Integrated Desease Management Guide For Small Grain

 

Disease Management and Practices Foliar Diseases Seed and Seedling Diseases Root and Crown Diseases Head Diseases Virus Diseases

 

Wheat and Barley Leaf Rust Control Recommendations

 


Fungicide Common Name Fungicide Trade Name Formulated Rate/Acre
azoxystrobina (wheat only) Quadris 6.2-10.8 fl oz
propiconazoleb Tilt 3.6EC 4.0 fl oz
propiconazole + trifloxystrobina Stratego 250 EC 10.0 fl oz
pyraclostrobinc Headline 2.09EC 6.0 - 9.0 fl oz

Other Control Recommendations: Wheat Cultivars   Management Practices



Remarks:

aFor wheat only. Quadris and Stratego should be integrated into an overall disease management strategy that includes proper selection of varieties with disease tolerance, proper timing and placement of irrigation, removal of plant debris in which inoculum overwinters, plant residue management, and crop rotation. Resistance management: Do not make more than two applications of Quadris per acre per year. Application directions: Quadris should be applied prior to or in the early stages of disease development. Applications may be made at any time, immediately after jointing (Feeks 6 or Zadok's 31) up to late head emergence (Feekes 10.5 or Zadok's 59). A crop oil concentrate adjuvant may be added at 1.0% V/V to optimize efficacy. Do not apply later than Feekes growth stage 10.5 (Zadok's 59). Do not harvest treated wheat for forage. Do not apply more than 0.77 quarts product/acre/season (0.4 lb ai/A). Do not apply within 14 days of harvest for hay. Do not apply within 45 days of harvest for grain and straw.

bScout fields weekly from Zadoks' growth stages (GS) 30 through 59 (Feekes'GS 5 through GS 10.5). Examine plants from 5 to 10 randomly selected areas within the field. Make application only when rust pustules cover 1-3% of area of fully expanded upper leaves (see leaf area figure), but not before first joint (Feekes' GS 6 or Zadoks' GS 31), except in Tidewater region south of the James River. See Figure 1. Do not apply more than 4 oz/A/ year or after Feekes' GS 10.5 or Zadks' 59 on wheat. Do not apply after Feekes' 8 or Zadoks' 37 on Barley. Do not graze or feed livestock treated forage or cut the green crop for hay or silage. After harvest the straw may be used for bedding or feed. Follow label instructions for additional precautions.

cHeadline should be integrated into an overall disease management strategy that includes proper selection of cultivars with disease tolerance, removal of plant debris in which inoculum overwinters, and plant residue management. Resistance management: do not make more than two applications of Headline/A/year. Determination of treatment threshold: Scout fields weekly from Zadoks' growth stages (GS) 30 through 69 (Feekes' GS 5 through 10.53). Examine plants from 5 to 10 randomly selected areas within the field. Make application only when rust pustules cover 1% to 3% of area of fully expanded upper leaves (see leaf area figure). Do not apply to barley after Zadoks' GS 55 (Feekes' GS 10.3). Do not apply to wheat after Zadoks' GS 69 (Feekes' GS 10.53). Do not harvest hay within 14 days of application.


Biological Description




Last updated on March 03, 2003.