Your SlideShare is downloading. ×
0
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Ok soybean expo 2011 -weed control
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Ok soybean expo 2011 -weed control

131

Published on

Presented at 2011 OK Soybean Expo in Stillwater, OK.

Presented at 2011 OK Soybean Expo in Stillwater, OK.

Published in: Education, Technology, Business
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
131
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
0
Comments
0
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Recipe for Success:Weed Control in 2011OK Soy Expo<br />Joe Armstrong<br />Extension Weeds Specialist<br />
  • 2.
  • 3. Authority XL<br />FMC<br />Pre-mix of Authority & Classic<br />Use rates: 3.0 – 9.6 oz/acre<br />Fall and PRE applications<br />4.0 oz = 3.33 oz Authority DF<br />1.25 oz Classic <br />*36 month rotation restriction for canola<br />
  • 4. Warrant<br />Monsanto<br />Sold as MON 63410 in 2010<br />Use rate: 3 pints/acre<br />Apply Early POST, V2 – V3 growth stage<br />Tank-mix with POST product(s)<br />
  • 5. Verdict<br />BASF<br />Pre-mix of Sharpen & Outlook<br />Use rate: 5 – 10 floz/acre<br />Fall, burndown, and PRE applications<br />5.0 floz = 1 floz Sharpen<br />4.17 floz Outlook<br />
  • 6. Fierce<br />Valent<br />Pre-mix of Valor & pyroxysulfone<br />Use rate: 3 – 4.5 oz/acre<br />Fall, burndown, and PRE applications<br />3.0 oz = 2.0 oz Valor<br />1.5 ozpyroxysulfone<br />*Not currently labeled for use in OK<br />
  • 7. What is the #1 goal of weed control?<br />(Hint: it’s not always killing weeds)<br />
  • 8.
  • 9. PRE herbicides<br /><ul><li>Improve early-season control
  • 10. Less in-season weed pressure
  • 11. Can pay for themselves with as little as 1 bu/acre increase</li></li></ul><li>When do weeds begin reducing yields?<br />Adapted from Knezevic et al. (2003) Weed Tech 17:666-673<br />
  • 12.
  • 13. PRE herbicides inno-till soybean (NW OK)<br />glyphosate + 2,4-D alone<br />7 weeks after treatment<br />All treatments included glyphosate + 2,4-D ester (32 fl oz + 1 pt)<br />
  • 14. PRE herbicides inno-till soybean (NW OK)<br />glyphosate + 2,4-D alone<br />7 weeks after treatment<br />All treatments included glyphosate + 2,4-D ester (32 fl oz + 1 pt)<br />
  • 15.
  • 16. Early POST with residual<br />
  • 17. Herbicide resistance testing update<br />
  • 18. Glyphosate-resistant marestail in Oklahoma<br />Resistant<br />Susceptible<br />Untreated<br />1x glyphosate (0.75 lbae)<br />2x glyphosate (1.5 lbae)<br />4x glyphosate (3.0 lbae)<br />Grant County, 2010<br />
  • 19. PSS-2779 “Diagnostic Service to Test for Herbicide-resistant Weeds in Oklahoma”www.weedscience.okstate.edu<br />
  • 20.
  • 21. 2011 Weed Control<br /><ul><li>Use a PRE herbicide
  • 22. Burndown before planting—start clean
  • 23. Tank-mix to control difficult weeds
  • 24. Spray when weeds are small</li></li></ul><li>Thanks to:<br />Cooperators:<br />Lindy Baker<br />Jay Franklin<br />Bob Ross<br />Chad Otto<br />Curtis Vap<br />
  • 25. Contact information<br />Joe Armstrong<br />OSU Dept. of Plant and Soil Sciences<br />joe.armstrong@okstate.edu<br />Twitter: @OSUWeedSci<br />www.weedscience.okstate.edu<br />

×