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Ok soybean expo 2011 -weed control
- 1. Recipe for Success:Weed Control in 2011OK Soy Expo Joe Armstrong Extension Weeds Specialist
- 3. Authority XL FMC Pre-mix of Authority & Classic Use rates: 3.0 – 9.6 oz/acre Fall and PRE applications 4.0 oz = 3.33 oz Authority DF 1.25 oz Classic *36 month rotation restriction for canola
- 4. Warrant Monsanto Sold as MON 63410 in 2010 Use rate: 3 pints/acre Apply Early POST, V2 – V3 growth stage Tank-mix with POST product(s)
- 5. Verdict BASF Pre-mix of Sharpen & Outlook Use rate: 5 – 10 floz/acre Fall, burndown, and PRE applications 5.0 floz = 1 floz Sharpen 4.17 floz Outlook
- 6. Fierce Valent Pre-mix of Valor & pyroxysulfone Use rate: 3 – 4.5 oz/acre Fall, burndown, and PRE applications 3.0 oz = 2.0 oz Valor 1.5 ozpyroxysulfone *Not currently labeled for use in OK
- 7. What is the #1 goal of weed control? (Hint: it’s not always killing weeds)
- 10. Less in-season weed pressure
- 13. PRE herbicides inno-till soybean (NW OK) glyphosate + 2,4-D alone 7 weeks after treatment All treatments included glyphosate + 2,4-D ester (32 fl oz + 1 pt)
- 14. PRE herbicides inno-till soybean (NW OK) glyphosate + 2,4-D alone 7 weeks after treatment All treatments included glyphosate + 2,4-D ester (32 fl oz + 1 pt)
- 16. Early POST with residual
- 17. Herbicide resistance testing update
- 18. Glyphosate-resistant marestail in Oklahoma Resistant Susceptible Untreated 1x glyphosate (0.75 lbae) 2x glyphosate (1.5 lbae) 4x glyphosate (3.0 lbae) Grant County, 2010
- 19. PSS-2779 “Diagnostic Service to Test for Herbicide-resistant Weeds in Oklahoma”www.weedscience.okstate.edu
- 22. Burndown before planting—start clean
- 23. Tank-mix to control difficult weeds
- 25. Contact information Joe Armstrong OSU Dept. of Plant and Soil Sciences joe.armstrong@okstate.edu Twitter: @OSUWeedSci www.weedscience.okstate.edu