American Chestnut Cooperators'
Foundation
2008 Newsletter
Send your report via our Online Report Form
or to
Forest Service Road 708, Newport, Virginia 24128
Dear Friends and Cooperating Growers:
In special thanks to the many volunteers who have helped us reclaim the Lesesne
research plot, we feature a virtual tour.
The Lesesne is surrounded by state forest lands of the same name which
were donated by the DuPont family to the Virginia
Dept of Forestry (VDF) for
American chestnut research. Al
Dietz, cooperating with the VDF, planted here in 1969, on a
gentle south-facing slope at the foot of the Blue Ridge in deep fertile
loam soils. His original planting was about 10 acres, divided into
three squares with 40 rows and columns in each square and the chestnuts
planted on 10 foot centers. These chestnuts had been exposed to
ionizing radiation in an experiment aiming to induce mutations favorable
to blight resistance.
Over the years, nearly all of Al's chestnuts have died from blight, and
then from deer browsing the new shoots and from intense competition of
other trees when state funds for maintenance were cut. With the
exception of the roadways leading up to and between the squares and the
western edge of the middle square the planting disappeared in a tangle
of vines and other trees.
The western edge was saved because there in 1980, Bruce
Given and John Elkins of
our informal American chestnut research group had worked with Tom
Dierauf (VDF) to graft large survivors into the
stocks of the blight-killed chestnuts. In 1982 and '83, the first
blight cankers on the grafts were inoculated with a mixture of
hypovirulet (weak) strains of the blight fungus obtained from Jack
Elliston in Connecticut. Research conducted by Virginia
Tech graduate students, supported by the ACCF has shown some of
these hypovirulent strains have spread, over the past 26 years,
throughout the grafted trees. These grafts inspired me to add to
the collection.
My scope was quite limited until John
Buschmann approached the VDF to enlarge our edge by clearing an
acre, or the first 24 columns on the west side. Then, in 2002, a National
Wild Turkey Federation grant made it possible for us to clear and
plant 5 rows of second-generation all-Americans (Ruth x Miles) along the
downhill, southeast side. The following winter, once again the VDF
pitched in to clear the rest of the square, making planting room in
which we have established several additional breeding lines by
direct-seeding nuts beginning in 2003; they are first- and
second-generation intercrosses among six different parent trees.
In each case, before clearing, we flagged all the chestnut stems to be
saved for resistance testing; most failed the tests. On the
western side we left many failed chestnuts to witness the continuous
cycles of death by blight followed by regeneration via root sprouts; we
use the others for grafting stock.
Mainly I graft the parent trees whose progeny we have been planting
here, but also, some related chestnuts, such as "Ed", with its
first blight canker swollen, a very strong-growing volunteer from
a Virginia Tech breeding orchard, and "Joyce" an advanced
intercross (Parent x F1) made by John Elkins in 1993, which has thrived
with blight infection in a severe environment.
Because foresters don't like to cut down beautiful trees, in addition to
all the chestnuts, ranging in age from one to 49 years old, there are
four large tulip poplars and one oak among the upper eastern rows and in
the space between the upper and lower rows. Probably around 20
years old and up to 60 feet tall, they illustrate the site's growth
potential.
We have kept to the approximate 10 foot spacing between chestnuts, but
more than doubled the space between rows at VDF request for vehicle
travel. In the center of the square, the VDF bulldozed the cleared
trash trees to fill a big dip; a similar dump is at the beginning of the
first row at the bottom of this dip. These places have become
havens for birds, blackberries, and snakes. In rows two through 5,
many chestnuts planted in the dip died of apparent root rot, and we have
left most of these spaces planted in grass. We also left a broad
space between the upper and lower rows and a lesser one between the
western side and the eastern rows. These are buffer zones against
the spread of root disease.
In spite of watering, many of the seedlings planted in 2002 struggled
for several years, with yellowish-green
leaves and little or no growth increments, and many of them died
in their first two years, before we discovered that Phytophthora
was a problem here. We can guess how this soil-born disease may
have been introduced because it is
endemic in Piedmont soils, and the Lesesne is near the edge of
the Piedmont: it was probably transported here on the tires of
vehicles that had driven in infected fields or roadways.
After one of the big inspirational
chestnut grafts died from root rot, Gary cordoned off the area around
the two nearby grafts whose root systems were in contact with the dead
tree to ward off foot travelers and inhibit deer. Inside the cages
where small seedlings had died, apparently from root rot, we removed
them, treated the soil with SubdueMax fungicide drench and
planted grass. We also spread grass clippings around the
outside of cages and sprinkled gypsum inside the cages of nearby
seedlings to help control the spread of this disease.
These measures cannot save the big chestnuts with extensive, deep root
systems, so Gary has been treating them with a combination of
fungicides, painted on the lower bark (where Phytophthora
can cause collar rot) or injected into the stem from whence it
works down to the roots. These treatments are experimental, but
they have been used with success in avocado orchards. He also
covered the soil at the base of the trunks with limestone gravel, to
prevent splashing of soil onto the bark during heavy rains. Other
measures to contain the spread of Phytophthora:
vehicle traffic is minimized and restricted to the roadways; we treat
shoes, tools, gloves used in the infected area with 20% Clorox solution
for two minutes; the contract mower power-washes his equipment, does not
mow within 24 hours of a rainfall, and begins at the top of the plot,
working downhill and avoiding the cordoned-off area.
Before we discovered the Phytophthora
problem, weeds appeared to be the most trouble. This is to
be expected in any fertile site in full sun. Where the soil is deepest
and in the dip, which holds moisture longest, by August the weeds are
over my head. I tried tree mats to control weeds inside the
cages; the tree mats encouraged voles. We use Roundup between and
outside the cages, and I hand-weed inside the cages, once in winter and
twice in the growing season. Weeding one row can take an hour.
Probing for vole tunnels with a
stick, at first I seeded the tunnels with Prozap
or another more expensive poison. I found so many tunnels, I think
chestnut roots must be the voles favorite food. They may graze on
feeder roots of seedlings for many years, severely
stunting the growth (also causing
yellowish-green leaves), or in a drought they may be capable of
consuming the whole taproot, leaving a once three-foot tall chestnut
seedling rootless and leaning against its cage. In this way, I
lost about a dozen seedlings here last August. This year I tried Molemax
sprinkled inside the cages, in March and June, with extra doses whenever
new holes appeared or where my probe turned up new tunnels. This
has been more effective than poison (unless the poison had already
knocked off most of the vole population), and this summer most of the
formerly stunted chestnuts are thriving and many have doubled their
size. I will apply Molemax again in September. On the
chance that nutrition delivered via the leaves may assist recovery of
the chestnuts with vole-damaged root systems, I spray
the seedlings having poor leaf color with iron chelate and magnesium
sulfate, on alternating weeks.
NOTE: It is inadvisable to
plant chestnuts in or near former apple orchards because voles
are famous apple orchard pests.
We plant empty spaces where chestnuts have died from blight or
voles by direct-seeding with members of the same family which were
open-pollinated on a precocious F2 graft or on one of the parent trees.
There are about 30 places to be re-seeded this winter. In
drought, watering the one- and two-year old chestnuts can take two
hours.
There is so much work to be done in this plot, we work here most
Tuesdays. On workdays November
through January, we prepare planting holes, direct-seed the nuts
from the previous fall, erect protection cages and transplant volunteers
(planted by squirrels, often inside the cages). In February,
I am collecting scions and preparing the stems to be grafted beginning
mid-March through April. In
late spring and summer, I try to cruise the whole plot,
checking and tying up the new grafts, straightening out any cages which
the deer have crashed into and looking for other problems, with a roll
of flagging and a Sevin sprayer
handy. Besides defoliation, insects can wound the tiny stems of
new seedlings, providing an entry for blight before the seedlings are
big enough to express resistance; they can take out the leader of big
seedlings. So I spray the newly planted chestnuts and those
leaders still within reach on the bigger chestnuts.
Among my Lesesne grafts, 7 are
bearing nuts and 4 others have made their first male flowers. Among
the seedlings planted in 2002, 38 have outgrown the 5-foot
tall cages and are enclosed in heavy-gauge, 4-foot cages with a bigger
grid for easier weeding inside cages. Eight of these are bearing
nuts and an equivalent number made first male flowers.
Among the seedlings grown from chestnuts direct-seeded in 2003, 17
have outgrown the 5-foot cages, one made early flowers, and the tallest,
at 18 feet, nearly equals the size of the champion among the seedlings
in the lower rows which had a two-year head start! The glorious
chestnut grafts of 1980 are showing no signs of decline and producing
big chestnut crops. For the time being, the infection in their
roots is under control.
The Lesesne is the largest of many research plots where American
chestnuts in our breeding program are under study, producing information
as well as chestnuts. Future newsletters will visit the other
plots.
Those of you who can travel and are unwilling to wait a year, may see
one or more of the other research plots by volunteering
to help at harvest, weekdays
September 22 through October 10.
To volunteer, suggest a date when you may be able to help, by e-mail to accf@hughes.net
My 2008 Report shows a total of
469 chestnuts surviving, mostly from direct-seeded nuts; 71 are new this
year. I have 99 grafts, only 18 of which are new, and 2 of these I
shall have to destroy since they have been ID'd as American x Japanese
hybrids. We shall no longer
solicit scions or identify leaves for others, because of the time
involved. To make the most of many possible intercrosses among the
12 parent trees already identified by our tests as blight resistant, we
must concentrate on them.
We received Reports from 209 growers in
2007, reporting on 5,175
ACCF chestnut survivors. Where are the rest of the reports?
Since 1985 we have sent out about 160,000 American chestnuts. Where have
all these chestnuts gone? So far
in 2008 we have received 141
reports, of 4,286 survivors
At the 100th anniversary of the founding of the
American Phytopathological Society, Gary's invited talk,
reviewing and evaluating recent progress in the many branches of
American chestnut research, was very well received. Among the best
pictures shown were the two biggest Lesesne grafts and John's
"Joyce " chestnut. This is the objective opinion of an
interested observer.
Several years ago, Douglas J. Buege
spent a week, working with us in many of our chestnut plots, as part of
his preparation to write about the organizations working for American
chestnut recovery. His book has a few small errors and a final
chapter with which we do not agree, but otherwise we recommend
If a Tree Falls for evenhanded reporting written in engaging
style. Available from Xlibris Corp. at 1-888-795-4274 or
Orders@Xlibris.com
Thanks to Outstanding Cooperators
who helped with the 2007 harvest: Philip
Latasa, Tim Logan, Vincent Roberts, E. C. Horman, Harold & Rich
Pierce, Albert Ward, Molly & Shawn Hash.
who assisted in spring 2008 grafting: Eli
Lewis and Elizabeth Cooper.
who probed for voles and made the March Molemax
application in the Lesesne: Victoria
& Eli Lewis.
who gave substantial funds that support student
technicians to keep chestnut research going in the laboratory at
Virginia Tech and pay the contractors for maintenance and improvements
in the largest research plots: The
National Wild Turkey Federation, John B. Buschmann, Carl Mayfield, and
Violet Pesinkowski.
Our directors believe in the all-American chestnut breeding program.
This is the reason for the ACCF. We are working to restore 100%
American chestnuts in our forests. However, some of our growers
have been hedging their bets and also planting hybrid chestnuts
developed elsewhere. The nuts from their plantings will not be
all-American; in this way the ACCF contribution to American chestnut
restoration could be diminished or erased.
To insure that American chestnut groves, established with our help,
accurately reflect our breeding program, we have changed the Grower
Agreement form. To order or request ACCF seedlings, chestnuts or
scions, please fill out and return the new form (link on front
page). If you have already reported via our Web site, please
indicate this on the Report form. The $20 donation to ACCF
research is unaffected by inflation, but please note that the nursery
cost of seedlings is valid only for the 2008 supply.
When we establish a chestnut planting, we try to plant on sites which
are ideal for growing American chestnuts, but a trouble-free chestnut
site has not yet been found. So if you want a successful chestnut
planting, you must commit to defend your work, in spite of all losses.
You may e-mail me for advice in dealing with trouble as it arises
(accf@hughes.net), or write in the space at the bottom of the Report
Form. Your reports are most welcome; we look forward to
them.
Respectfully submitted,
Lucille
Lucille Griffin, Executive Director
Other ACCF Directors
Gary Griffin, President,
Professor Emeritus of Plant Pathology, Virginia Tech
Dave McCurdy, Vice-president,
retired Superintendent, Clements State Tree Nursery, WV
John Rush Elkins, Secretary,
Research Chemist, Professor Emeritus of Chemistry, Concord
College, WV
William Pilkington, Treasurer,
Financial Advisor, Ghent, WV
Ed Greenwell, Director of
Tennessee chestnut projects, Electrical Engineer, Cookeville, TN
Dear Friends and Cooperating Growers:
If you have reported on previous ACCF plantings and donated $20 in 2007,
and if we have a Grower Agreement Form on file in your name, you
are welcome to order American chestnut seedlings (through November)
and/or nuts (until October 15). The 2007 cost per bundle of 25 or
fewer American chestnut seedlings is $27. Growers west of the
Mississippi need to add $5 extra per bundle to cover higher mailing
cost. Please make the check payable to ACCF.
From the 2006 Virginia harvest we sent 3,880 nuts to cooperating
growers, 4,698 nuts to nurseries in West Virginia, and last winter the
nursery distributed 4,535 American chestnut seedlings to our cooperating
growers.
HARVEST
You can either harvest chestnuts out of the trees in their burs or off
the ground where they have dropped. Following last falls abundant
harvest, I thought we might switch to this second method,
eliminate the storage problem and the job of getting nuts out of burs,
and greatly decrease the numbers to be processed and sent to growers.
The squirrels have been good cooperators for several years now, planting
nuts in every one of our breeding orchards and even starting some of
them right in the row where there was a space, so I do not mind letting
them have a bigger share. However, Dave McCurdy tells me
that the nursery chestnuts will produce a much smaller crop this fall
because of poor pollination. So we must try for the big harvest
once again, to be able to send the nursery sufficient seed to make 2008
seedlings.
Chestnut trees are individuals with different
schedules: they do not all ripen their chestnuts at the same time,
but over a period of roughly two weeks which, in Virginia, usually
begins in the last week of September. Harvest starts when burs
begin to crack open, then the burs on that tree may be ready to pick.
However, burs which contain no viable nuts may crack open as much as two
weeks early, and chestnut trees often contain small numbers where the
flowers happened not to be fertilized. Furthermore, the first chestnuts
to make flowers contain much larger numbers of infertile nuts, because
many of their flowers were receptive before any pollen was available.
So before picking a tree we make sure that the cracked burs contain
full, fat chestnuts, not sunken blanks. We use hand clippers and a
pruning pole that extends up to 12 feet, and sometimes also a 6-foot
ladder. Wearing leather gloves we collect the burs into dog food
bags, marked with the date and the name of the mother tree and store
them in a rodent-free cool place, in the basement or in lidded garbage
pails in the shade.
MANY THANKS to the
volunteers who helped pick chestnut burs in 2006: Matt
Habersack, Albert Ward, Nate Faris, Rich and Harold Pierce.
To help at harvest, e-mail Lucille at accf@hughes.net for a date
and directions. We will not begin picking the burs before the week
of September 24, leaving our yard at 9 a.m.; in afternoons
the first week of October, we should begin getting the nuts out of the
burs. We will not harvest on the weekends of September 22
and 29 because of home football games.
We check the storage bags once a week, dumping the
contents onto a picnic table to see if more burs have cracked open .
Wearing heavier leather gloves, we remove the nuts from their burs, then
return the unopened burs to their bags for a few more days in storage,
when they can be checked again. In years of fall drought, some
burs will not crack open unassisted: rolling the bur back and
forth underfoot sometimes does the trick. Burs which cannot be
opened by humans may be scattered in the woods, where the animals can
deal with them or they might be planted, expecting a very low percentage
to make seedlings.
WEEVILS are common
throughout the range of American chestnuts, especially in areas where
Chinese chestnuts have been planted and their nuts and burs are left to
rot on the ground. The insect lays its eggs in the young chestnut
flowers and weevils (tiny worms) develop inside the chestnuts and burs.
The weevils over-winter in the ground where they emerged from wasted
nuts and spent burs to hatch out the following spring and increase
destruction of the next nut crop. To control weevils, you make a
clean harvest, burn or bury the burs and ruined nuts and encourage your
neighbors to do likewise.
PROCESSING & STORAGE
We must assume there may be weevils in the chestnuts, so we give our
chestnuts a hot water bath at 120 F for 20 minutes to kill
weevils the same day that the nuts come out of the burs. After the
hot bath, we put the chestnuts in a cold bath to stop the heat
treatment. Once they are cooled down, we pat them dry and spread
them on newspapers till they are no longer damp; then we pack them with
slightly damp peat moss in plastic bags with a few pin holes for air
exchange and send them to growers.
Those chestnuts which we keep to plant in our
research plots, we place inside plastic mayonnaise or peanut butter jars
in which small holes have been drilled, in a 50/50 mix of sand and peat
moss. We bury the jars under about 4 inches of soil with grave
markers. In Virginia the chestnuts can be safely stored this way
until early February, when many of them will begin sprouting. We
have direct-seeded chestnuts in November, December, January and February
and have had the best success with January planting.
Growers who do not plant their chestnuts
when received, but store them in the refrigerator, should check the bag
at least once a week, to be sure the chestnuts are not drying out or
getting wet and becoming moldy, then turn the bag onto the other side.
It is too easy to forget this chore and let the seed spoil in storage;
in this way, very large numbers of seed are lost each year because
growers cannot plant when they receive them.
You may notice on the
Grower Agreement Form that we will be sending only 10 chestnuts per
grower request. Growers who need a larger number for
a group project may obtain more by volunteering at harvest, taking your
chestnuts in the burs and doing the processing yourselves.
GYPSY MOTH has invaded
Giles County. Luckily, only one of our research plots was
infested. I first noticed tiny black caterpillars toward the end
of May, picked off by hand those within reach on our chestnuts, squashed
them and sprayed with Sevin. Their numbers and size increased at
an alarming rate. It became necessary to visit the plot at least
twice a week, pick them off and stomp them, spray after each rain.
While the tall canopy oaks were completely stripped of leaves, followed
by nearly all the other hardwoods and understory trees and bushes, our
chestnuts thrived in the additional sunlight. The battle to save
them lasted about 3 weeks, and we must expect a similar job in this plot
in future years. We noticed that the gypsy moth does not eat the
leaves of the tulip poplar or cucumber magnolia. This suggests
that plantings located in clearings within solid groves of these species
(such as the Pandapas plot below our yard) may be less likely to suffer
a gypsy moth attack.
GROWERS REPORT
516 of the American chestnuts I planted are still growing. Among
them, 155 are new this year, although 20 of these are not planted
on their permanent sites but growing in a yard nursery, for transplant
following dormancy this November. These 20 are survivors from a
bunch of rejects: they appeared during processing to be in very poor
condition, too discolored --suggesting possible mold-- or too dry to
send to growers or to the nursery; they are a great example of the
benefit of getting the seed right into the ground. In
addition to the numbers above, we have at least 3 dozen chestnuts which
I did not count because they were planted by the squirrels. My
tallest seedling is Pacman E; I am unable to measure it without help.
The tallest grown from 2006 nuts are 2 feet. Six of my seedlings
are bearing nuts. Losses in our research plots were attributed to
voles, root rot or blight.
As of December 7, we have
received 194 reports, for a total
of 5,027 ACCF chestnuts reported.
These numbers will be updated, as more reports come in.
GRAFTERS REPORT
The past two years I have tried a few topgrafts (whips), choosing
stocks among sunny -side branches on blight resistant American chestnuts
which are growing in places where a pollinator is distant or lacking.
On the down side, because the grafted branches are only 1/4 inch in
diameter, the graft is vulnerable to blight. However, these grafts
are much easier to execute because you are not lying on the ground and
there is nothing to inhibit making the cuts exactly as you want to, so I
judged it worth the risk. Two of my new grafts this year are
topwork and although they are still alive, their branches could go
out this winter. Including these, I have 19 new grafts
growing in 4 sites. All but 2 (triangles) are whip grafts.
Last winter we lost several big grafts (voles eating the roots) and had
the tops blight-killed in several others. Surviving are 105
grafts, divided among 9 sites. The tallest is Thorofare Gap,
grafted in our yard in 1991. Forty-one of my grafts bear nuts, and
their pollen is improving the potential of the chestnuts harvested in 5
of our breeding orchards.
Yes, indeed, I am bragging a little, hoping to
interest some more of you in learning to graft, to improve your own
chestnut plantings, like Harold Pierce
is doing in Alabama: he has 2 grafts from 2005, one from 2006
and 8 from 2007; all bark grafts into chinquapin, they
represent a very nice variety of blight resistant American chestnuts.
Health problems prevented Carl
Mayfield from grafting this year, but he has sent in a wonderful
report of 29 grafts surviving from past years; among them are
nearly all the American chestnuts of note in our breeding program.
NATHAN PEASE UPDATE
The Nathan nutgraft on which we have been reporting the progress of
blight-resistance trials has been killed by a root rot. Another,
smaller Nathan nutgraft on a different site is in its second summer with
blight. It has 7 burs.
WATERING
The bare-root seedlings from the nursery require one gallon of water
each week of drought through their first two growing seasons. For
successful planting, it is very important to plan for this. On
planting sites where watering may be a problem, it is best to plant
smaller numbers and consider starting from nuts instead of seedlings.
Here in Virginia, we often have drought in August,
and in some of our plots, also in July and September. So we have
been establishing the Pandapas plot, by direct-seeding about 20
per year, with the goal of making a grove of 100 American
chestnuts in the National Forest 100 yards down the mountain from our
yard. We plant the nuts inside 8 inch tree shelters, sunken
a few inches in the ground and surrounded by wire cages to deter
raccoons. The small seedlings, less than two feet tall, can
survive on a quart of water per week of drought because their roots are
equal to the stems and sometimes larger (whereas nursery seedling roots
were trimmed at lifting). We remove the short tree shelters after
the first growing season.
In Turkey Run, the two research plots are both 100
yards up the mountain from the access road. These plots were
originally for grafting, but so many of the native root systems have
been weakened or killed, we decided to plant about a dozen seedlings to
make up the deficit. Direct-seeding there just provided more food
for a large vole population. Therefore, this winter we
started nuts in December by the Moote
Method, in a south-facing window , as follows: using 18
inch tree shelters with newspaper liners, we filled them with a 50/50
mix of damp peat moss & sand, let the fill settle for a day and then
press a nut one inch down, lay plastic wrap on top until the
sprouts begin to emerge (about one month), water sparingly, the same as
other house plants. In January and February we dug 2 foot planting
holes and put gallon milk jugs full of water, 3 each per hole, inside
the cages where animals could not steal the water. During a
rainy week in May, we transplanted the 6 to 8-inch tall seedlings.
These tiny seedlings also can get by on about a quart of water per week
of drought. Watering them in the cool of early morning through the
summer heat was made easy, with the supply already on site.
We thank the National Wild Turkey
Federation for continuing generous support of our cooperative
research with the Virginia Department of
Forestry, USDA-Forest Service
and Virginia Tech, breeding for
blight resistance, establishing and maintaining forest plots of ACCF
all-American chestnuts.
SPECIAL THANKS to more OUTSTANDING
COOPERATORS:
John B.
Bushmann, Ken James, Carl Mayfield, and Violet
Pesinkowski, long-term, big supporters of the research for
American chestnut restoration.
Philip Latasa
once again volunteered several days in the Lesesne last winter,
making the work go faster as we moved protection cages, removed tree
mats, weeded and treated the soil with gypsum (where we have had
root-rot in the past) and prepared new planting holes.
Remmington Bolt
also volunteered several days last winter, pruning trees at the Airport
and cutting trees at Turkey Run.
These are a few of my favorite things: working
outdoors, the company of towhees, bluebirds and indigo buntings,
watching chestnuts grow, the green of new leaves unfolding on grafts and
seedlings, a complete row of American chestnuts, a fawn
springing up from its bed in the tall weeds, a newly mown or
completely weeded research plot, hundred-foot tall tulip poplars right
next to a chestnut plot, the perfect mornings in March and April when I
graft with highest expectations, the moments each year when the
last newsletter is in the mail, the last nuts are off to growers, the
last orders, to the nursery, and lots of reports about ACCF chestnuts.
Thanks again for sending your report.
Respectfully submitted,
Lucille Griffin, Executive Director
Other ACCF Directors
Gary Griffin, President, Professor of Forest Pathology, Virginia Tech
Dave McCurdy, Vice-president, Superintendent, Clements State Tree
Nursery, WV
John Rush Elkins, Secretary, Research Chemist, Professor Emeritus of
Chemistry, Concord College,
WV
William Pilkington, Treasurer, Financial Advisor, Ghent, WV
Ed Greenwell, Director of Tennessee chestnut projects, Electrical
Engineer, Cookeville, TN
Dear Friends and Cooperating Growers:
We shall distribute American
chestnut seedlings and/or nuts to growers who have made the annual $20
donation to ACCF research, have sent in a completed Grower Agreement Form
and have reported in 2006 on the status of their previous ACCF planting
projects.
There in no monetary profit in our chestnut
distributions. Each year we aim to break even. After learning
the nursery cost per bundle of seedlings, we make a price to include the
average cost of priority mailing east of the Mississippi. The past
few years, the Foundation has lost money on seedling distributions, and
this year the nursery costs have gone up one dollar per bundle of 25.
Therefore, the 2006 cost per bundle of 25
American chestnut seedlings is $25. Growers west of the Mississippi
need to add $5 per bundle to cover a higher mailing cost.
Please make all checks payable to ACCF.
From the 2005 Virginia harvest we sent
2,378 nuts to cooperating growers, 7,541 nuts to the nursery in
West Virginia, and the nursery
distributed 5011 American chestnut
seedlings to our cooperating growers.
MANY
THANKS
Right up front, we wish to thank all the volunteers who helped with the
2005 chestnut harvest: Tim
Logan, Jack Torkelson, Bruce Engen, Gary Pace, Philip Latasa, Michael
Linder and Steve Prupas.
To pitch in at harvest, e-mail Lucille at
accf@hughes.net for a date and directions. We are likely to begin
picking the burs mornings on the week of September 18, leaving our yard at
9 a.m.; we should begin getting the nuts out of the burs in
afternoons by October 2. We will not be scheduling any harvest
help for the weekends of September 16, 23 and 30 because the home football
games monopolize local accommodations and highways.
A
CHESTNUT PARABLE
Before the deer herd had become a problem, perhaps 20 years ago,
when we did not have enough cooperating growers to plant all our seednuts,
I used to plant the extras along the edges of wildlife clearings in the
National Forest or along the Forest Service Road. Since they were
planted without protection, nearly all of those chestnuts have been eaten.
Fewer than a dozen have survived continuous munching and exist as tiny
bushes. Just one among the hundreds planted has made a great
escape. It is almost 4 inches dbh and 30 feet tall, growing in
semi-shade on the steep bank opposite our driveway. Last winter when
it developed a fist-sized canker halfway up the trunk, I expected the top
to die this summer. However, in September, the only dead
foliage is on a lower branch. Gary's opinion of this tree, Keep an
eye on it. In keeping with the designations assigned to our yard
seedlings, we named this chestnut, G-wiz.
This story illustrates several points: First, it
is unwise to assume that chestnuts can grow into trees without benefit of
protection cages. Second, the larger a chestnut can grow before its
first blight attack, the better its chances to express blight resistance.
Third, it is very important to note when a chestnut is first attacked by
blight and observe its reaction. Fourth, a chestnut which has not
been attacked by blight (blight free), however lovely to look upon, is not
yet anything special. Finally, one observation of a blight resistant
reaction is insufficient evidence; to be included in our breeding
program, the chestnut has to prove itself by surviving five to 10
additional years without death in its crown.
ESCAPES
As more and more enthusiasts comb the woods each year, more discoveries of
large American chestnuts (over 10 inches dbh) are reported. In most
cases these chestnuts are disease escapes, growing in the far north, south
or western edge of the natural range for the species or in a pocket
sheltered from normal wind dispersal of the blight fungus. They may
be blight free or they may have grown quite large before their first
blight attack. Like my G-wiz chestnut, they also bear watching.
Although they are likely to die from blight within a few years,
there is always a chance that some may prove to have durable blight
resistance.
RAISING
AMERICAN CHESTNUTS
The ACCF chestnuts we distribute to you, our cooperating growers, have
much greater chances to express blight resistance. We estimate at
least 10%. The best possible result will be obtained by growers who
plant in well-drained, sandy loam soil, in full sun, on cove slopes facing
North to East at altitudes below 2,500 feet, protecting against injury to
the trunk and leader of each seedling with 5-foot-tall wire caging, and
regularly checking seedlings to deal with other problems as they arise.
The most important site
requirement is that it be well-drained, to avoid the possibility of
root rot. Growers who have discovered root rot among their plantings
should try to limit its spread by fencing off and marking the area with
bright flagging, avoiding work there when the ground is wet, planting
grasses but no seedlings downhill from the infected area and treating
tools, gloves and footwear with a 20% Clorox solution immediately after
use there (for more information, scroll down and see
Phytophthora, in the 2003 Newsletter).
Tree mats
(Forestry Suppliers, Inc.) are helpful in controlling
weeds inside the cages, but they also offer cover for voles
that can nip off the chestnut roots. Weeds and grasses are serious
competition to young seedlings and will greatly retard their growth,
leaving the seedlings at high risk for a longer period. In
very fertile plots we are unable to control the weeds without tree mats.
We lift the mats two or three times a year, pull weeds and put poison
(Prozap) into vole runs and tunnels.
Japanese beetles
can be picked off by hand from lower branches and hit with Sevin on leaves
that are out of reach. Where a plot is isolated, you can spread Milky
Spore over the grassy area to wipe out the Japanese beetle problem.
Ambrosia beetles
can be eliminated if the infestation is caught early in spring and sprayed
with permethrin through that growing season and again in March of the next
year.
When a small chestnut seedling
(under an inch in diameter) is girdled
by blight, the stem can be cut near ground level and the wound
covered with soil. If its root system is healthy, a new shoot will
take over, grow rapidly and give the chestnut a second chance.
Pruning is not
usually advised, but sometimes you need to cut out blighted branches.
This should be done in the fall when the blight fungus is least active.
Cover the wound with pruning seal. When a chestnut has more than one
stem, choose the strongest and cut the others below ground level, cover
these cuts with soil.
The first swollen blight canker often occurs at
the base of a chestnut. We advise making mud
packs to cover basal cankers
through winter dormancy and keep them in place, watering occasionally,
until the seedling is 1.5 inches in diameter.
When the leaves
of a seedling are not dark green,
there may be a nutrient deficiency. This can occur occasionally in a
plot where other seedlings are making healthy growth. We spray
yellowish leaves with magnesium sulfate and repeat the following week if
their color seems to be improving. Otherwise, spray chelated iron
and observe whether it makes a difference. This is quicker and
cheaper than individual soil or leaf tests for each plant.
About midway through the growing season, often the leaves
on the tips of branches in many chestnuts become rumply
and curled up. This is an unidentified disease, possibly a
virus. It is not lethal, but it sharply curtails growth for the rest
of that season. This year we noticed that in many cases the curly
leaves are lighter in color than the other leaves on the chestnut.
We sprayed magnesium sulfate and iron chelate on the curly tips, on the
possibility that the chestnuts are deprived of nutrients. In many
cases, the curly leaves turned a darker green, and in several cases the
seedling resumed production of normal leaves.
GROWERS REPORT
This year I have 406 American chestnut seedlings growing, of which 105 are
from chestnuts planted last winter. My tallest is Pacman E, which
has had swollen blight cankers since 1999. Six of my seedlings are bearing
nuts. My losses are nearly all attributed to voles or blight.
As of December 15, we have received
152 reports, for a total of 10,092
ACCF chestnuts reported. The numbers above will be updated,
as more reports of chestnuts from ACCF distributions come in.
GRAFTERS
REPORT
In the past I have reported some instances of high percentage takes with
bark and cleft grafting methods. Unfortunately, the numbers have not held
up. Many bark and cleft grafts make spectacular growth on incomplete
unions, but for many years they remain highly vulnerable to total
wipeout from high winds. Comparing my notes, I was unable to find
anything to account for this uneven reliability. So I have given up
on them; beginning this year I am making only whip and triangle grafts.
John Elkins still has good success with bark grafts.
I have 90 grafts growing well, of which only 9 are new
this year. My tallest is Thorofare Gap, at 50 feet; it was grafted
in 1991 and has had swollen blight cankers since 1998. Thirty-one of my
grafts are bearing nuts. Losses are attributed to incomplete unions and
blight.
A few of our best grafters have reported early:
Carl Mayfield has 42 ACCF grafts, of which 7 are new this year. Ed
Greenwell has 49 grafts, of which the tallest is 25 feet. Carl &
Ed make mostly nut grafts. Harold Pierce has 6 grafts, of which 3
are new this year; Harold grafts into chinquapin stocks.
NATHAN
PEASE UPDATE
The end of this growing season finds Nathan Pease 25 feet tall, with no
new blight cankers and its one trunk canker surrounded by swollen tissue
which has expanded inward to cover a little of the exposed wood.
We are watching it: two years down and 8 to go.
We thank the National Wild Turkey
Federation for continuing generous support of our cooperative
research with the Virginia Department of
Forestry, USDA-Forest Service and Virginia
Tech, establishing and maintaining forest plots of ACCF
all-American chestnuts.
The Pandapas
plot now has 79 American chestnuts growing. They are mostly first
generation crosses among chestnuts that were not represented in our
original intercrosses: Thompson, NC Champ, Ragged Mt, and JEB.
We also planted some volunteers into which we plan to graft the parent
trees (above). From 2006, we have one JEB graft started.
The tallest chestnut in this plot is a 5-foot (Thompson x NC Champ) from a
nut planted in 2003.
At Turkey Run 18
grafts survive, and two of these are new in 2006; all are in the
(Ruth x Miles) family, F2s. The two grafts killed in 2005 by
ambrosia beetle have sprouted back; time will tell whether these sprouts
come from the grafts or the blight-susceptible stocks. One
graft made male flowers only.
Three seedlings planted in 2002 survive; the tallest is
5 feet. We direct-seeded twelve more chestnuts harvested from a (Ruth x
Miles) F2, by planting them inside 2-feet tall, fine-mesh hardware
cylinders that were sunken a foot into the soil which contained glass
shards; most germinated, but all were killed by voles. To plant
these places we shall try one more time, in winter of 2007, using
seedlings grown from an open-pollinated F2. Most of the work
in this plot is management, cutting the other trees, so that the chestnuts
are the tallest trees and wind dispersal of pollen (perhaps next year) may
be most efficient.
In the Lesesne
State Forest, Nelson County, we have 234 seedlings mostly growing
from various F1 and F2 intercrosses along with a smaller number of
open-pollinated nuts from the parent trees of these crosses.
Sixty-four of these are from nuts planted last winter; some are survivors
from a test planting (to determine whether Phytophthora was still a
problem) in 20 holes which were treated with SubdueMax drench in 2004 and
2005 after the previous seedlings died of root rot. This year, all
seedlings and grafts in the lower half of the 3.4 acre plot received a
dressing of gypsum, which is said to disrupt Phytophthora
reproduction, and the grafts and seedlings near or downhill from the 1980
Thompson and Ragged Mt grafts (which have survived with blight control for
25 years and are now seriously threatened by Phytophthora root rot)
were surrounded with a thick mulch of grass clippings, to inhibit spread
of this root disease. Fungicide treatments are being continued
only within the canopy of the two large grafts, above.
OUTSTANDING COOPERATORS:
John B. Bushmann,
Ken James, Karl Mayfield, and Violet
Pesinkowski continue extensive support for and participation in
American chestnut restoration research.
Philip Latasa
was most helpful during the 2005 chestnut harvest and also
volunteered many hours working in the Lesesne, lopping off ailanthus,
digging and preparing the planting holes, making protection cages and
pruning trees that shaded the planting area.
Jenny & Lizzy
Cooper again spent their spring vacation grafting American
chestnuts.
FOR INTERNET RESOURCES:
Scroll down to the end of the 2005 or 2004 newsletter.
We are a very small, nonprofit foundation,
capable of doing a very big job for American chestnut restoration because
our scientists and officers are all dedicated volunteers and the
Foundation neither owns nor rents property. Thus, we can make
progress with a small budget, because funds are needed only to support the
research, to pay for student assistance in the laboratory and field, for
plot maintenance and supplies, and for correspondence and mailing seednuts
to you, our cooperating growers. The thousands of ACCF American
chestnuts growing in research plots on public lands and on your lands, and
you, our cooperating growers, are the most important assets of our
Foundation. Our rewards are in knowledge reaped from scientific
research and field experience and shared with the public. We thank
you for joining in and supporting our work and look forward to counting
many more of your reports among this year's rewards.
Respectfully submitted,
Lucille
Griffin, Executive Director
Other ACCF Directors:
Gary Griffin, President, Professor of Forest Pathology, Virginia Tech
Dave McCurdy, Vice-president, Superintendent, Clements State Tree
Nursery, WV
John Rush Elkins, Secretary, Research Chemist, Professor Emeritus of
Chemistry, Concord College, WV
William Pilkington, Treasurer, Financial Advisor, Ghent, WV
Ed Greenwell, Director of Tennessee chestnut projects, Electrical
Engineer, Cookeville, TN
American
Chestnut Cooperator's Foundation
The 2005 Seedling Cost is
$40 per 50 or fewer year-old, bare-root American chestnut seedlings
mailed to growers east of the Mississippi. For western growers, the cost
is $50 per 50 seedlings, to cover the additional mailing cost. Seedling
orders need to be submitted on a Cooperating Grower Agreement form (inside
leaf), unless we already have one here on file for you. Make the check out
to ACCF, and please remember to include your annual donation if you have
not already sent it in. Early ordering is strongly advised; we ran out of
seedlings in the beginning of November in 2004.
Everyone who has a Grower Agreement on file with us and has sent in a
donation this year may request up to 15 American chestnut seeds.
But you will need to get your request in early, also: all chestnut seeds
which have not been requested by October 15, will be shipped to the
nursery to make next year's seedlings. We have discontinued the practice
of sending out larger seed lots to individuals or groups. The work of
processing, extracting them from their burs and then the hot water
treatment, 120 F for 20 minutes, is very time-consuming, and we do not
have the capacity to store large numbers of chestnut seed.
From the 2004 Virginia harvest we sent 4,716 nuts to cooperating
growers and the nursery in West Virginia, and the nursery distributed
5544 American chestnut seedlings to our cooperating growers.
The only way to get more than 15 American chestnuts is to help out at
harvest and take up to 100 nuts home with you, in their burs, and process
them yourself. We need volunteer help at chestnut
harvest, usually beginning in the third week of September, to
cut out the burs on the trees ready to be harvested and put burs into dog
food bags marked by mother tree. The seed orchards are in Blacksburg and
Giles County. I usually leave home around 9 and work till noon or until
the work for that day is done. Some days there may be only one tree to
harvest, other days, many. The burs are cut with an extension pole pruner
usually 12 feet long; you hold it overhead, stretching to reach the burs
and bracing against the rope pull that works the blade. It is hard work,
for strong, younger persons. To pitch in at harvest, e-mail Lucille at
accf@direcway.com for a date and directions.
We store the burs in the basement about a week, until many are cracking
open, then extract nuts from the burs, wearing heavy leather gloves,
working outside on a picnic table, usually afternoons, beginning in the
end of September. This is a repetitive job that wears out your hands and
grip. We would be grateful for help with this, also.
Voles are determined miners of American
chestnuts, eating the nuts before they sprout and eating the roots when
they grow below the protection of the tree shelter. Direct-seeding
chestnuts is wasted effort in the face of large vole populations and
nursery plantings may be possible only with special precautions. The bed
should be prepared by digging a trench one foot deep and lining the bottom
and sides with quarter-inch grid hardware cloth before replacing the soil
and planting. The hardware cloth should extend several inches above ground
where it is joined by a ch chicken-wire fence. Poison baits to be placed
in PVC pipes or tire halves can be obtained at feed stores, but they
require daily monitoring to remove the dead voles.
The Asian ambrosia beetle is a tiny pest
which has been found throughout the southeast, from Texas to coastal
Maryland. To reproduce, the female bores pinholes into the sapwood of
young, thin-barked hardwoods. The beetle damage is most serious when it
begins in early March and April, and it continues at lower levels until
fall. While many other tree species may survive, an attack by ambrosia
beetles can be a death sentence for American chestnut because the blight
fungus may enter through the many tiny holes.
Defend against this pest by examining the lower trunk and branches of
chestnuts smaller than 3 inches in diameter at breast height: look for the
telltale pinholes; sometimes a tiny column of sawdust is protruding from
the hole. Check once a week at least, beginning in March and throughout
the season. If any pinholes are found, treat the entire bark surface
weekly with a spray containing permethrin. Prune out heavily infested
stems and burn them. Stems with strong root systems can sprout back if you
cut the stem near ground level and cover the wound with soil.
Here in the Virginia mountains, this is the first year we have found
ambrosia beetle damage. Because so much is at stake in the four research
plots involved, we have been spraying all the chestnut stems 3 inches in
diameter and smaller in these plots. The beetles had been at work for two
months before we discovered them, so we may lose at least six large
grafts. We hope, through vigilance and prompt treatment, that you may be
able to avoid similar losses.
This Grower's Report covers twelve separate
American chestnut research plots: eleven are in three Virginia counties
and one is in West Virginia. Half are in yard or orchard settings and half
are in the forest. I have been planting American chestnuts since 1985.
This year I counted 331 survivors, of which 131 are F2
seedlings (second generation all-Americans). My tallest is Pacman, at
about 35 feet, and three of my seedlings are bearing nuts. Seedling losses
this year I attribute, in order of importance, to poor germination, hungry
voles, blight, Phytophthora, and other unidentified varmints.
As of MAY 8, we have received 141 reports
from growers, for a total of 6639 ACCF
chestnuts reported.
This Grafter's Report covers eight grafting
plots in Virginia, all of which contain seedling plantings, also.
Four plots are in the National Forest. For 2005, I have only 15 new grafts
surviving. From all the years since 1990, I have 111 surviving grafts of
which 26 are bearing nuts. Thirty-eight are F2
grafts, and three of these are bearing. As always, graft failure is the
biggest problem, followed by premature blight infection, undermining of
the root systems by a root rot or voles, and now also, the ambrosia
beetle.
We look forward to reading your grafting reports, and as they are
received, they will be posted in the on-line newsletter here:
Carl Mayfield reports 41
surviving ACCF grafts. Harold Pierce
beginning this year grafting into chinquapin has 4
grafts.
Nathan Pease is the occasional subject of
inquiry. Ed Greenwell named his Pease seedling, Nathan when it showed
precocious blight resistance. You may remember that we began the
blight-resistance trial on a Nathan nutgraft in May 2004, by inoculating
the lowest branch in two places with a killing strain of the blight
fungus. This May the results were disappointing: the level of blight
resistance recorded in the one-year test is very low and would be
insufficient for inclusion in our breeding program. However, there is the
second, long-term test: this spring we inoculated a blight canker on
Nathan's trunk with hypovirulent strains of the blight fungus. A few of
our American chestnuts, which did not test well at first, have since shown
impressive long-term resistance (10 years +).
Breeding: We have just over a hundred control
bags up in six different mother trees. All of this year's intercrosses are
first generation all-Americans, to increase the numbers that may be
available for future testing in several new lines which we started in
previous years. Although the mother trees have demonstrated very
impressive long-term blight resistance, we have learned from past
resistance trials that blight resistance of the parent trees does not
regularly combine. Equal or better blight resistance may be expected to
show up in about 10% of the progeny. This is one reason why breeding for
blight resistance takes so much time.
Another reason is premature infection with the blight fungus. The one-year
resistance test requires trunks blight free and at least 1.5 inches in
diameter at breast height. Before they reach this size, many American
chestnuts have blight on the main stem. This is the case with our large,
bearing F2 grafts. We inoculated their cankers with
hypovirulence and will have to watch them over 10 years, instead of being
able to make selections for the next generation following a one-year test.
Thus, we did not put bags on the F2 flowers.
We thank the National Wild Turkey Federation for
continuing support of our cooperative research with the Virginia
Department of Forestry, USDA-Forest Service and Virginia
Tech, establishing and maintaining forest plots of ACCF all-American
chestnuts.
The Pandapas plot has 96 prepared planting holes, with staked
5-foot weldwire cages and tree mats for weed control. From the 2003
planting, 7 (Th x J) and 7 volunteers (for grafting) have survived. Last
winter, we direct-seeded nuts to fill all the empty spaces for a total of
96 and planted four to six daffodils around each cage in an attempt to
create an area unappetizing to voles. We also made a small nursery
planting with 30 extra from this seed lot in a cold frame in our yard, for
a backup system, in case of poor germination or theft. Only 31 of the
direct-seeded chestnuts germinated and all 30 in the backup nursery were
stolen by voles. The tallest new seedling is 21 inches. We are
contemplating strategies for planting the 51 empty spaces this winter.
At Turkey Run 15 grafts survive. Two each were killed this past
spring by blight and ambrosia beetle. The few new grafts made failed, so
we concentrated efforts to cut back the competing tree species and bring
more sunlight on the grafts and other chestnuts which may be grafted in a
year or two, when they are growing more vigorously. We direct-seeded seven
(Ruth x Miles) to fill the empty places in the small planting area where
three chestnuts from previous plantings survive. Here we had excellent
germination, but one by one, at six to eight inches tall, the five planted
in the bottom row died, their roots trimmed off by voles.
In the Lesesne State Forest, Nelson County, we planted in holes
where nuts or seedlings had previously failed 59 open-pollinated nuts and
12 volunteer seedlings. None of the nuts germinated in the two sections in
which we have a Phytophthora problem, while seven of the small
volunteer seedlings survive there, but with insignificant incremental
growth. We continue to treat with SubdueMax fungicide drench, spring and
fall, most of the lower half of this 3.5 acre plot and also tried a
chicken manure treatment in the spring.
In the 2003 planting section, most of the open pollinated nuts germinated
and 9 have survived. Nearly all of the controlled pollinated nuts
germinated, also: we have 27 (NCC x J), 26 (VT2 x G4) and 12 Pacman. Total
survivors in this planting, including 6 F1
back-crosses to the Floyd parent, are 80. Many of the new seedlings were
at or over 20 inches tall when checked on August 9, and the tallest
2-year-old is 4.5 feet.
In the 2002 planting, 88 of the original F2
seedlings survive, along with 5 F2 grafts and 5
volunteers for future grafting. The tallest seedling is 12 feet. Most of
the losses in this planting have been to Phytophthora.
The western third of the Lesesne plot contains the big 1980 grafts and
many root systems from the original Dietz planting in 1969, some of which
may receive grafts in the future. We have nine new grafts in this area,
along with 12 others made since 2000. Three of the older grafts and one
from this spring have died apparently from root rot, along with two small
seedlings. Ten seedlings survive, although the tallest has yellowing
leaves which might be an early sign of stress from root rot. In addition
to the fungicide drench, we spray yellowing leaves with magnesium sulfate
and amend the soil inside the cage with compost, in case the problem may
be nutritional.
We have gone into detail, to give the newcomers among an idea of some
growing problems in forest settings, as well as any planting place without
very good drainage.
Outstanding Cooperators:
John B. Bushmann, Ken James, Karl Mayfield, and Violet Pesinkowski are
long-term, outstanding supporters of and contributors to American
chestnut research.
Charlie Elgin and another gentleman, whose name I have misplaced,
helped with the 2004 chestnut harvest. We hope to recognize the
unidentified gentleman here next year.
Jenny & Lizzy Cooper cut trees in the Turkey Run plot and
grafted, spending their spring vacation helping the American chestnut
cause.
INTERNET RESOURCES: Ed's Web page showing Nathan's progress
http://www.accf-online.org/nathanblight.htm
The Tennessee ACCF site, also by Ed: http://www.geocities.com/RainForest/Canopy/1436/
ACCF Links page, by Ed, featuring a March 2003, photo of Jenny
Cooper grafting in Craigs Creek research plot:
http://www.accf-online.org/links.html
We are working for American chestnut restoration with the hope of making
a small contribution which might be multiplied many times throughout the
natural range and through the generations to improve our forests. This
is often hard work and also demands a stubborn, long-term commitment,
keen observation skills and a thoughtful, rapid response in
problem-solving. It teaches the habit of keeping notes and is a great
introduction to scientific study. With our work product constantly
exposed to the forces of nature, we learn to develop patience in
adversity and humility in success. Our spirits are uplifted by each
small advance, and we give thanks. These are the values which made our
country great. You cannot go wrong by involving the whole family,
children and grandchildren in American chestnut restoration.
Respectfully submitted,
Lucille Griffin, Executive Director
Other ACCF Directors
Gary Griffin, President, Professor of Forest Pathology, Virginia Tech
Dave McCurdy, Vice-president, Superintendent, Clements State Tree
Nursery, WV
John Rush Elkins, Secretary, Research Chemist, Professor Emeritus of
Chemistry, Concord College, WV
William Pilkington, Treasurer, Financial Advisor, Ghent, WV
Ed Greenwell, Director of Tennessee chestnut projects, Electrical
Engineer, Cookeville, TN
American Chestnut Cooperators' Foundation
2004 Newsletter
Dear Friends and Cooperating Growers:
STRONG HELP WANTED AT HARVEST to
wield 12 and 20 foot extension-pole pruners and cut the burs out of seednut
mother trees. We will need help on September 18, 20-24, 27-30 and October 1.
Meet at Forest Service Rd708, Newport, VA at 9 a.m; e-mail accf@direcway.com
for directions.
ACCF BREEDING
In our quest for all-American chestnuts with high
blight resistance, we start from original blight survivors with low levels
of blight resistance. By selecting the best blight-resistant
individuals through successive generations of breeding, we aim to
concentrate their blight resistance, to obtain the high level which is
required for long-term survival within the American chestnut's natural
range. This is a classic breeding method. It has been widely
successful, creating many disease-resistant crops.
With trees, it just takes longer. A
generation for American chestnuts is 8 to 10 years from
controlled pollination to blight-resistance testing. We have three
breeding lines in their second generation; of these only (Ruth x Miles) may
begin testing within a year or two. Other 2004 controlled all-American
intercrosses include (G4 x Fl), (BigM x G4), (Fl x JEB), (Th x JEB), (RgMt x
JEB), (NCC x JEB), (MtL x JEB), (MtL x Am), (Lo x Am) and (Lo x JEB).
But what about the seedlings and seednuts from open
pollination which you, our cooperating growers, are raising? Thousands
of these, planted within the natural range, are being field-tested by the
ever-present blight. Most may have some genes in common with our
controlled intercrosses, as well as genes from dozens of other
blight-resistant American chestnuts. The best blight-resistant
individuals to turn up among them are to be our source of diversity for the
blight resistant American chestnut population. Gary and John plan to
visit your plantations as they mature to evaluate these American chestnuts.
We rely upon your reports to help identify the best American chestnuts from
our distributions. Pollen and scions from the very best among them
will add the finishing touch to each ACCF breeding line.
COOPERATOR'S AGREEMENT
We request all cooperating growers to sign, date
and fill out the enclosed Cooperating Grower's Agreement form, in pledge of
your commitment to our breeding program. An additional document
(posted on our Web site) will be required for orders of 100 or more
seedlings or requests for larger than the usual (15) seednut
allotment.
LOWER SEEDLING COST
The 2004 nursery cost for seedlings is $35 per 50
or fewer year-old, bare-root American chestnut seedlings. This
includes Priority mailing, where necessary, to most addresses East of the
Mississippi. Growers West of the Mississippi need to add $10 per 50
American chestnuts to cover a higher shipping cost. Orders must be
received on a Cooperating Grower's Agreement form. We strongly advise
those who cannot plant seedlings in winter to request seednuts instead.
The nursery distribution schedule depends upon the
weather. American chestnuts must be fully dormant before lifting.
Also, the machinery cannot operate on very wet terrain. Thus, the date
when seedlings may be mailed is unknown until the last minute, and we are
unable to promise delivery for a specific date. In general, the
chestnuts are lifted in the second half of November, processed and packed on
a Saturday for mailing the following Monday. All
growers should start now to prepare the holes and erect protection cages.
The ability to plant seedlings soon after they arrive correlates strongly
with high transplant success.
PROTECTION CAGES are necessary to
save your young American chestnuts from deer and rabbit depredations.
We prefer to make our cages from 2 x 4 inch grid, 4- and 5-foot tall
weldwire (sometimes called dogwire). You can cut 7 cages from a 50
foot roll. When constructing cages, it is best to bend only 3 wires,
with the middle wire bent in the opposite direction to the wires at the top
and bottom. This way, cages can be easily moved, as needed. We
use five-foot cages to protect the leader of shorter seedlings and
grafts; we change to 4-foot cages once the leader is 7 feet tall. The
strongest stakes for cages are 4-foot rebar, but half-inch conduit is
lighter-weight for carrying into plots and also cheaper. Running deer
may crash into cages, destroying them, if they are not decorated with bright
flagging.
GROWERS' REPORTS
From nuts and seedlings I have planted over the
past 20 years, I count 258 surviving American chestnuts. Only 6 of
these are big enough to take care of themselves. The rest require
regular attention through the growing season to keep them in full sun and
free from the competition of other plants, to minimize insect damage, and
nip all other problems at the bud. My experience with setbacks,
natural and unnatural disasters is the source for most of our
recommendations to growers. Thus, I read your reports with sympathy, I
appreciate your efforts (often in spite of the evidence), and I always
hope to be able to help.
As of 12/12/05, we have received 168 reports of 5,455
surviving ACCF chestnuts. If yours is not among these, please send
your report via our Web site or on the reverse side of your Cooperating
Grower's Agreement form. Your numbers will be added the tally above.
Last winter, we sent out 2,737 seednuts and
8,595 seedlings to cooperating growers.
GRAFTING REPORT
I have 36 new grafts, representing 30% success
overall for 2004, but as usual, the results varied greatly among the
different plots. Many losses at the Airport and Scion Bank were caused
by tiny ants colonizing the new grafts inside their shelters and eating the
buds. This might be avoided in the future by sprinkling Diazinon on
the soil surrounding each graft. Most other losses I attribute to bad
luck in timing the graft: on certain dates nearly everything grew,
while during one whole week everything failed. Thus, some plots had
success higher than 60%, while others obtained less than 20%. I have
altogether 117 surviving grafts and Carl Mayfield has 92. We look
forward to your grafting reports and observations.
BLIGHT RESISTANCE TESTING
begins in May, when blight-free American chestnuts that are 1.5 inches in
diameter at breast height can be inoculated with a known killing strain of
the blight fungus. Then, the following May we measure the size and
depth of the blight canker and compare it against the standard developed by
Gary Griffin. About a dozen (Miles x Ruth) F2 grafts were
large enough this year; but unfortunately, well before May, none were
blight-free. Keen to begin testing something, I chose Ed Greenwell's
Nathan Pease nutgraft, although it was only one inch dbh. We are
looking forward to May 2005 results.
NWTF GRANT
Many thanks to the National
Wild Turkey Federation for very generous support of our project,
in cooperation with the Virginia Department
of Forestry, USDA-Forest Service
and Virginia Tech, to establish and
test in forest plots ACCF all-American chestnuts.
Last winter, the Blacksburg Ranger District cleared
the area in the Jefferson National Forest
which they had cut for the Pandapas plot to test a first generation
intercross (Th x J). We have marked 10 rows with 10 foot spacing down
the mountainside in this east-facing cove. We prepare each hole thus:
cut and pull roots, dig 18 inch hole, mix a tablespoon of Diazinon in the
fill and replace it, push an 8 to 10 inch cylinder 2 to 3 inches down in the
center of the planting place, install a tree mat (Forestry Suppliers, Inc.)
and a staked, 5 -foot tall protection cage, hung with pink flagging to keep
deer from crashing into cages. Our yield from 2003 controlled
pollinations was so disappointing, we only had 12 nuts to plant (in
the cylinders) here last winter. Seven have survived, and we
planted an additional row of volunteer seedlings, of which 8 survive.
These volunteers are from American chestnuts that are not blight resistant;
we will use them for grafting stock to include the parent trees in the same
plot with their progeny, for test purposes. This past June and
July, hoping for enough seed to fill out plantings this winter, we
pollinated each flower 3 times at 5 day intervals, instead of the usual two
times.
In the Lesesne
State Forest, Nelson County, in the area newly cleared by the VDF, we
planted two and a half long rows by direct-seeding as above, with several
different controlled intercrosses, F2 and F1. This new planting
has 28(VT2 x G4), 21(NCC x J), 2(F x G4), 5(Ruth x F) and 2 Pacman.
Also surviving in the other parts of this plot from past years' planting are
102(Miles x Ruth) and 12 additional F1 intercrosses. From past
years' grafts 16 survive, along with 16 new grafts, mostly F2 but also some
parent trees. In May, we inoculated blight cankers on seven of the F2
grafts with hypovirulence. In June, Gary applied Subdue
fungicide drench in two areas where seedlings or grafts have died from a
root rot. We cannot increase the Lesesne plantings until the
Phytophthora or other root-rot pathogen is under control.
At Turkey Run
we have 24 F2 grafts and 3 F2 seedlings. We have inoculated the first
blight cankers on six of these grafts. Altogether, we now have 18
(Miles x Ruth) F2 grafts under integrated management: blight-resistant
all-Americans on ideal sites managed for American chestnut, with their
first blight cankers inoculated with select hypovirulent strains of the
blight fungus. Our largest F2 graft (20 ft) is at the Airport;
it made 2 female flowers which we pollinated with JEB.
2004 OUTSTANDING COOPERATORS
Wayne Bowman of the Virginia
Department of Forestry and Ed Leonard,
Silviculturist of the George Washington and Jefferson National Forest, for
invaluable cooperation and assistance in research plots.
Jenny, Lizzy & Lise Cooper, and Vicky
Lewis for harvesting most of our 2003 seednuts. They held the
pruning poles last fall.
John Buschmann, for contributions too
numerous to cite toward ACCF progress in the research at the Lesesne State
Forest, and Frieda for pitching in
with the dirty work.
Ken James, no relation to Jesse, for
his work at Chestnut Hill. In July, Gary and I visited Ken to
look over his American chestnut restoration project. He has 38
surviving grafts and 271 seedlings growing on ideal, rich chestnut land in
the severe upstate NY climate. This is a great test site. To
create his chestnut plots, he cut the big timber himself. In addition
to ACCF stock, his collection includes some good-looking native NY
chestnuts. Considering the quality and scope of Ken's work at Chestnut
Hill, we are amazed.
Carl Mayfield, for regular generous
support of ACCF research, outstanding grafting and an extensive,
well-documented American chestnut restoration project.
Violet Pesinkowski, for regular, very
generous support of ACCF research.
Douglas Buege, for volunteer labor in
ACCF research plots, carrying bales of weldwire, preparing terrain, cutting
trees and weeds.
By taking on the job of restoring American
chestnuts in the forests, we accept a huge environmental challenge.
This year, we are pleased to welcome many new cooperating growers from the
National Wild Turkey Federation. We need as many hands as
possible to make the long-term commitment and share the hard work.
Cutting trees, weeding, digging planting holes, constructing cages, driving
stakes, planting or grafting, you may be tired, dirty and sweating, but
nevertheless very happy to look upon your work and give thanks that you are
still able to do this work. The possibility of an American chestnut
grove is worth it.
Respectfully submitted,
Lucille Griffin, Executive Director
Other ACCF Directors
Gary Griffin, President, Professor of Forest Pathology, Virginia Tech
Dave McCurdy, Vice-president, Superintendent, Clements State Tree
Nursery, WV
John Rush Elkins, Secretary, Research Chemist, Professor Emeritus of
Chemistry, Concord College, WV
William Pilkington, Treasurer, Financial Advisor, Ghent, WV
Ed Greenwell, Director of Tennessee chestnut projects, Electrical Engineer,
Cookeville, TN
Dear Friends and Cooperating Growers:
NEW SEEDLING PRICE
We are late figuring the seedling cost this year
because we lost money on last year's distribution. Also, we have learned that
most seedlings sent outside West Virginia are in the mails for as long as 2
weeks, even those going across the river to Ohio. Seedlings now cost
$40 per bundle of 50; for bundles of 25 or fewer, the cost is $23.
We highly recommend that all growers who do not plan to
pick up their seedlings (see below, Open House) and do not live in West Virginia
consider requesting Priority mailing. Priority costs an additional $10
per bundle. When you write your check payable to ACCF,
please remember to add your contribution for 2003 ($20) to the research that
supports these distributions.
The nursery has designated only 4,500 seedlings for
ACCF growers this year, so it is best to send your orders in early.
OPEN HOUSE
1. The West Virginia Forest Tree Nursery where
they harvest the nuts and then grow the American chestnut seedlings which
we have been distributing since 1989, will hold an open house for ACCF growers
on Saturday, December 6, from 10 to 12 a.m.
The nursery is located about 10 miles north of Point
Pleasant, WV, in Lakin, near the Ohio River, on Route 62.
Please note in your order, if you plan to pick up your
seedlings at that time. We can send you a list of motels within a 10 mile
radius of the nursery upon request.
Come and meet Dave McCurdy, John Elkins, and (weather
permitting) Ed Greenwell, ask questions and discuss your growing problems and
solutions.
2. The Airport Research Plot near Virginia Tech in Blacksburg is
the place where we hold spring grafting lessons; there we are making another
demonstration of integrated management for chestnut blight control. We
also have about 2 dozen tiny volunteer chestnut seedlings which may be dug up
and taken home. Lucille can meet you at 10 a.m. on November 8.
Please request directions to avoid being late to this open house. Security
requires locking the gate after entering.
PHYTOPHTHORA
The first symptom of a Phytophthora infection is
premature yellowing leaves, followed by browning leaves and then death of the
stem. When the seedling is dug up, a brownish-black decay is evident on
the fine roots and the structural roots. Unlike chestnut blight,
Phytophthora offers no second chance because it kills the roots as well as the
top.
The ultimate defense is to plant in sandy, well-drained
soils, avoid low-lying and flat land (unless the soil is sandy), and also, avoid
old fields in the Piedmont. In cases where the soils are ordinarily
well-drained but are heavy in texture, unusually wet conditions can slow the
drainage to create a Phytophthora problem.
If the disease is diagnosed in its early stages,
it can be controlled with a fungicide drench (Ridomil or Subdue) applied
following the manufacturer's directions. This is an expensive and
labor-intensive solution which we recommend only where the planting site
is ordinarily well-drained but held water longer than usual because of extremely
heavy and frequent rains.
If you have a Phytophthora problem: put the dead
seedlings directly into garbage bags and send them to the landfill; seed the
planting holes with grass to contain spread of the pathogen, and do not replant
American chestnuts there, or nearby downhill from the
Phytophthora-infested area.
VOLES
They make tunnels in field and forest, feeding on
insect grubs, worms and roots, and like many other creatures they fancy American
chestnuts.
With no voles in the neighborhood, you can protect
direct-seeded chestnuts with a tree shelter about 10 inches tall, driven two
inches into the soil and staked in place. The nut is planted no more than
an inch down and covered with peat moss, and the shelter is surrounded by a 5
foot tall weldwire cage to protect against raccoon, rabbit and deer.
Voles simply undermine this defense and eat the
chestnut root as it emerges below the shelter barrier. The control
recommended for commercial orchards presumes an ability to visit the plot daily;
if you may be able to do this, then contact your County Agent for help.
Other possible courses of action include planting daffodil bulbs (which are
poison) in a wide circle around each chestnut and/or mixing ground glass around
and below each chestnut. More vole control suggestions are most welcome.
NWTF GRANT
This year a National Wild Turkey Federation grant of
$5,000 continues support for planting second generation all-Americans (F2s)
and making grafts of them to test their blight resistance and to establish two
seed orchards on public lands.
For part of this project, we cooperate with the Virginia
Department of Forestry in the Lesesne State Forest. In February,
they cleared an additional acre or so to make more space for planting &
grafting. This past November and March, in last year's planting rows, we
filled the empty places by direct-seeding. This September, I counted 112 F2
seedlings there, (Miles x Ruth) and (Ruth x Miles). Although three of the
seedlings are 6 foot tall and three are 5 foot tall, the majority grew very
little this year because of intense weed competition (over 8 feet tall) and a
non-lethal virus infection on the leaves.
The grafts of these F2s in several sites number
54, but they represent only 40 individuals, and of these it appears that only 5
may be large enough to begin blight resistance testing in May 2004, while the
others will need at least one more growing season to reach the required diameter
of 1.5 inches at breast height.
The test for blight resistance includes inoculation with a
killing strain of the blight fungus, after which the canker growth is measured
over a 2-year period.
Our new seed orchards are under development in cooperation
with the USDA-FS, Blacksburg Ranger District. The Craigs Creek
project now has 22 grafts and 5 seedlings, all from the same controlled
pollination (above). While 7 of them are over 12 ft tall, we did not plan to use
these grafts for resistance testing, but instead, to put them under integrated
management as soon as they are naturally infected by blight.
The final step in integrated management involves regularly
checking for blight and inoculating the first blight cankers (on resistant
individuals) with hypovirulent strains of the blight fungus selected from the
research cultures at Virginia Tech. In May, we inoculated with
hypovirulent strains the first three F2 grafts to be infected with
blight, in 2 other test plots.
In our Poverty Creek project, the Forest Service has cut less
than an acre in a mesic, east-facing cove site where we shall begin
direct-seeding this November to establish a new breeding line with different
parent trees.
LARGE SURVIVORS
Recently there has been a great deal of public interest in
searching for additional American chestnuts which appear to have survived the
blight and therefore might be useful to programs breeding for blight resistance.
While this is a worthy project, our limited personnel and
resources are fully employed and often working overtime. We cannot take
time off to check out a discovery unless the American chestnut is growing in
heavy blight territory, not on the periphery of the natural range, in a forest
setting, at an altitude over 3,000 feet, and it is over 10 inches in diameter at
breast height with visible blight, but no serious crown damage.
No doubt there are numerous survivors which miss the above
description by only one or a few criteria and are therefore well worth the
effort of saving the genes for future testing and breeding. This could be
done best by nutgrafting. Those interested will find a detailed
description of how to make nut grafts in Ed Greenwell's paper at:
http://www.accf-online.org/chestnut/nutgrafting.htm
GRAFTING REPORT
This was a mediocre year for me. I have just 25
new grafts, including two that were made by Jenny Cooper. Overall a
total of 125 of my grafts survive on 9 different sites. Carl
Mayfield reports a total of 50 ACCF nutgrafts, which includes 30 new
nutgrafts this year.
Burnie & Essie Burnworth attended April grafting
lessons and have reported 4 of their grafts at Stronghold, MD, are growing well.
Grafting invitation: learn chestnut-grafting techniques
at Virginia Tech in April of 2004, by appointment on a morning of your choice.
This invitation is open to all growers who send an additional donation to
support ACCF research. Please respond in February, suggest two dates
(from which I could choose one) and indicate how many grafts you plan to
attempt, so that we may have enough scionwood to share with you.
GROWERS' REPORT
If you followed our recommendation to plant on
well-drained sites, 2003 was a great growing year throughout the East.
I have counted 191 survivors, and my tallest from a
2002 nut direct-seeded is 2 feet! A few of my 2- and 3-year-olds have
doubled their height. While our Western growers hauled water, we pulled
weeds and cut competing trees. American chestnut seedlings hardly ever
succeed without a good deal of work.
Ed's Nathan Pease American chestnut is still
looking good, but my graft of it will not be large enough to begin its
blight-resistance test until 2005.
Thanks very much for reporting! We have so
far received reports from 114 growers of 4,166 ACCF chestnuts
surviving in 2003. Sometimes I wonder if everyone understands that total of ACCF
seedlings surviving means the grand total for all years plantings. We
accept additions and corrections. Late reports will be added
to the above numbers as they are received..
This past year we sent 7,627 seedlings and 6,917 seednuts
to cooperating growers in 37 states and Ontario.
SEEDNUTS
We are expecting a smaller crop of seednuts here in Virginia
because of the very heavy and frequent rains during pollination time.
Each grower may request 15 nuts, but we will probably run out of seed
earlier than we did last winter (January 21).
I did not put many control bags in the Miles and Ruth
grafts, thus many more of their open pollinated nuts may go out to our most
reliable, reporting growers.
Looking out our dining room window, I saw female
flowers in our Pie chestnut's crown. In between rains, I tossed into
its upper branches the catkins leftover from this year's controlled crosses.
These father trees may give this year's Pie nuts many more interesting
possibilities, so they also will go only to our growers who have reported.
HARRY HOTINE SCHOLARSHIP
We have awarded the graduate student, Eric
Hogan, a research scholarship in memory of my father, a self-educated man
who knew and loved the trees, all the Latin as well as common names, and was a
great believer in education and hard work. With this scholarship we
recognize Eric's contribution to American chestnut research through long hours
of careful work in the laboratory.
OUTSTANDING COOPERATORS
Many thanks again to John Buschmann, John
Buschmann, Jr, and the Jones Family for pitching in and supporting
our work in the Lesesne State Forest.
Once again, Violet Pesinkowski (NY) and Carl
Mayfield (VA) have been extremely generous in support of the graduate
student research at Virginia Tech.
Mark Depoy, Mammoth Cave National Park, (KY) was
responsible for planting 2,000 additional ACCF seedlings in our National
Parks.
Thanks to Jason Kramer for engaging Biology and
Botany students at Yough High School in a large project, raising American
chestnuts from seed, planting them on Pennsylvania State Game Land and sending
us an A+ report.
Thanks to John Knouse, who once again sponsored and
manned an ACCF booth at an environmental fair in Athens, Ohio, we have many
additional Ohio growers. And Laurie Spangler set up an ACCF exhibit
at the Mill Mountain Zoo near Roanoke, VA.
Ken James (NY) continues his efforts to maintain and
expand the largest American chestnut forest revival project outside Virginia.
Charles Lytton, (VA) Giles County 4-H Leader,
continues work with area school children, organizing help for harvest at the
Martin American Chestnut Planting, as well as spring field trips to area
chestnut-growing projects involving the children in planting, maintenance and
reporting; he also distributes seednuts to school growing projects.
We now have over 1,000 on the mailing list and look forward
to news about all those American chestnuts.
Respectfully submitted,
Lucille Griffin, Executive Director
Other ACCF Directors
Gary Griffin, President, Virginia Tech
Forest Pathology
Dave McCurdy, Vice-president,
Superintendent, Clements State Tree Nursery, WV
John Rush Elkins, Secretary,
Professor Emeritus of Chemistry, Concord College, Research Chemist, Beckley, WV
William Pilkington, Treasurer, ChFC, Cool
Ridge, WV
Ed Greenwell, Director of Tennessee
chestnut projects, Electrical Engineer, Cookeville, TN
FOUNDING FATHERS
Since the majority of you are new members, let us
introduce two deceased founding fathers, Al
Dietz and Bruce Given, West
Virginians whose dedication to American Chestnut restoration made possible
the Lesesne project and our breeding program for blight resistance.
Al was an industrial chemist; Bruce worked for the West Virginia Division of
Forestry. Well before the ACCF was founded, they were collecting
American chestnuts, together and for separate projects.
Al took large quantities of American chestnut seed to be
irradiated, with the hope of inducing mutations favorable to blight
resistance. He made plantations of these seedlings in cooperation with
landowners throughout the East. The Lesesne is his largest plantation;
the Virginia Tech airport plot is among his smallest. Stronghold, Inc.
in Maryland, a new 2002 ACCF member, is also a legacy of Al Dietz. We
were able to test very few of his trees (all at the Virginia Tech airport,
but just a small number at the Lesesne) for blight resistance and found only
a few at the Lesesne with low levels of blight resistance.
Al also discovered the Gault chestnut in Ohio, a
grandparent on both sides of our F2 cross, Miles x Ruth, with the best
chance right now to breed true for blight resistance.
Bruce Given was most interested in finding American
chestnuts with possible blight resistance and grafting them into Chinese
chestnut stocks to make all-American chestnut breeding possible and to
assemble an American chestnut collection at a West Virginia tree nursery.
Because of his nursery collections, we can distribute American chestnut
seedlings at cost to our members. Bruce spent years refining bark
grafting techniques, especially for American chestnut replication; his work
made our all-American chestnut breeding program possible.
Bruce grafted the blight-resistant chestnuts (1980) in
the Lesesne, into the stocks of some of Al's trees which were
blight-susceptible; he make the big chestnut grafts which have become the
first demonstration within the natural range of a high level of chestnut
blight control. Bruce taught John Elkins to graft chestnuts, and John
taught me. We are fortunate to follow in their footsteps.
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