Maximize yield and Italian ryegrass control with 2-pass herbicide programs<br />Joe ArmstrongOSU Extension Weeds Specialis...
Crop rotation is the most effective tool for improving weed control in wheat<br />
However, we still have many effective tools available in winter wheat<br />
Fall weed control = highest yields<br />60<br />≥ 85% weed control<br />55<br />50<br />Maverick<br />Wheat yield (bu/ac)<...
Fall weed control = highest yields<br />60<br />Despite still achieving ≥85% cheat control at 63 days after planting, yiel...
PRE & Early POST herbicides<br />Finesse<br />Amber<br />Maverick<br />Axiom<br />Prowl H2O<br />
PRE & Early POST herbicides<br />Preemergence and early-postemergence herbicides can be used to maximize early-season weed...
Excellent ryegrass control with Axial XL…<br />Preharvest ratings, Stillwater 2010-11<br />
Excellent ryegrass control with Axial XL…<br />Axial XL is very effective for postemergence ryegrass control.  Axiom will ...
Untreated<br />Photo taken May 14<br />
Axial XL<br />Axiom fb Axial XL<br />Photos taken May 14<br />
Both treatments resulted in excellent ryegrass control at the end of the season<br />Axial XL<br />Axiom fb Axial XL<br />...
..but early-season weed control is crucial<br />+ 6.6 bushels<br />Stillwater 2010-11<br />
..but early-season weed control is crucial<br />+ 6.6 bushels<br />Even though Axiom didn’t provide season long ryegrass c...
..but early-season weed control is crucial<br />+ 6.6 bushels<br />At $7-8/bu wheat, the added expense of a second herbici...
Untreated<br />Photo taken January 17<br />
Axial XL, 16.4 floz<br />applied December 2<br />Photo taken January 17<br />
Axiom, 8 oz<br />applied November 1<br />Photo taken January 17<br />
Axial XL<br />10 WAT<br />Axiom<br />6 WAT<br />Photos taken January 17<br />
The effects of early-season competition are very evident, both in yield and crop development<br />Axial XL<br />6 WAT<br /...
..but early-season weed control is crucial<br />+ 5.3 bushels<br />Perkins 2010-11<br />
..but early-season weed control is crucial<br />+ 5.3 bushels<br />Similar results were also observed at the trial at Perk...
Timing is crucial with Axiom.It must be applied when ryegrass is in the 1-2 leaf growth stage.<br />
For 2011-2012 crop:<br />To maximize Italian ryegrass control:<br />Axial XL POST<br />To maximize yield:<br />Axiom early...
Contact information<br />Joe Armstrong<br />OSU Dept. of Plant and Soil Sciences<br />joe.armstrong@okstate.edu<br />Twitt...
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Maximize yield and Italian ryegrass control with 2-pass herbicide programs

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Results of research conducted during 2010-11 season looking at 1- and 2-pass herbicide programs to improve winter wheat yield and Italian ryegrass control.

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  • 85% or better cheat control from 2 to 9 weeks after planting. But how much yield loss occurred in that same time frame?Fall weed control = better use of moisture, fertilizer, space. More vigorous crop = better, faster canopy development = cultural weed control.
  • 85% or better cheat control from 2 to 9 weeks after planting. But how much yield loss occurred in that same time frame?Fall weed control = better use of moisture, fertilizer, space. More vigorous crop = better, faster canopy development = cultural weed control.
  • 98% control with Axial XL, 99% control with Axiom fb Axial XL
  • 98% control with Axial XL, 99% control with Axiom fb Axial XL
  • 6.6 bu increase for Axiomfb Axial XL compared to Axial XL. At $7-8/bu wheat, the added expense of a second herbicide treatment is more than offset by the increase in yield—not to mention the increase in quality and reduction of future weed problems.
  • 6.6 bu increase for Axiomfb Axial XL compared to Axial XL. At $7-8/bu wheat, the added expense of a second herbicide treatment is more than offset by the increase in yield—not to mention the increase in quality and reduction of future weed problems.
  • 6.6 bu increase for Axiomfb Axial XL compared to Axial XL. At $7-8/bu wheat, the added expense of a second herbicide treatment is more than offset by the increase in yield—not to mention the increase in quality and reduction of future weed problems.
  • Early-season weed control leaves more moisture, fertilizer, light, and space for the crop. We will be further investigating weed control timing and nitrogen uptake by the crop and weeds this upcoming season.
  • Early-season weed control leaves more moisture, fertilizer, light, and space for the crop. We will be further investigating weed control timing and nitrogen uptake by the crop and weeds this upcoming season.
  • 5.3 bu increase for Axiomfb Axial compared to Axial XL
  • 5.3 bu increase for Axiomfb Axial compared to Axial XL
  • Timing is crucial. Also need to gather more information regarding potential variety sensitivity to metribuzin component of Axiom.
  • Axiom also provides additional herbicide modes of action to further mitigate herbicide-resistance.
  • Maximize yield and Italian ryegrass control with 2-pass herbicide programs

    1. 1. Maximize yield and Italian ryegrass control with 2-pass herbicide programs<br />Joe ArmstrongOSU Extension Weeds Specialist<br />
    2. 2. Crop rotation is the most effective tool for improving weed control in wheat<br />
    3. 3. However, we still have many effective tools available in winter wheat<br />
    4. 4. Fall weed control = highest yields<br />60<br />≥ 85% weed control<br />55<br />50<br />Maverick<br />Wheat yield (bu/ac)<br />45<br />Olympus<br />40<br />35<br />14<br />28<br />42<br />56<br />70<br />84<br />98<br />112<br />126<br />140<br />154<br />168<br />Days after planting<br />
    5. 5. Fall weed control = highest yields<br />60<br />Despite still achieving ≥85% cheat control at 63 days after planting, yields had already decreased by nearly 5 bu/acre.<br />≥ 85% weed control<br />55<br />50<br />Maverick<br />Wheat yield (bu/ac)<br />45<br />Olympus<br />40<br />35<br />14<br />28<br />42<br />56<br />70<br />84<br />98<br />112<br />126<br />140<br />154<br />168<br />Days after planting<br />
    6. 6. PRE & Early POST herbicides<br />Finesse<br />Amber<br />Maverick<br />Axiom<br />Prowl H2O<br />
    7. 7. PRE & Early POST herbicides<br />Preemergence and early-postemergence herbicides can be used to maximize early-season weed control<br />
    8. 8. Excellent ryegrass control with Axial XL…<br />Preharvest ratings, Stillwater 2010-11<br />
    9. 9. Excellent ryegrass control with Axial XL…<br />Axial XL is very effective for postemergence ryegrass control. Axiom will control early-season ryegrass, but will provide season-long control.<br />Preharvest ratings, Stillwater 2010-11<br />
    10. 10. Untreated<br />Photo taken May 14<br />
    11. 11. Axial XL<br />Axiom fb Axial XL<br />Photos taken May 14<br />
    12. 12. Both treatments resulted in excellent ryegrass control at the end of the season<br />Axial XL<br />Axiom fb Axial XL<br />Photos taken May 14<br />
    13. 13. ..but early-season weed control is crucial<br />+ 6.6 bushels<br />Stillwater 2010-11<br />
    14. 14. ..but early-season weed control is crucial<br />+ 6.6 bushels<br />Even though Axiom didn’t provide season long ryegrass control, the yields were still higher since early-season competition was reduced<br />Stillwater 2010-11<br />
    15. 15. ..but early-season weed control is crucial<br />+ 6.6 bushels<br />At $7-8/bu wheat, the added expense of a second herbicide treatment is more than offset by the increase in yield—not to mention the increase in quality and reduction of future weed problems<br />Stillwater 2010-11<br />
    16. 16. Untreated<br />Photo taken January 17<br />
    17. 17. Axial XL, 16.4 floz<br />applied December 2<br />Photo taken January 17<br />
    18. 18. Axiom, 8 oz<br />applied November 1<br />Photo taken January 17<br />
    19. 19. Axial XL<br />10 WAT<br />Axiom<br />6 WAT<br />Photos taken January 17<br />
    20. 20. The effects of early-season competition are very evident, both in yield and crop development<br />Axial XL<br />6 WAT<br />Axiom<br />10 WAT<br />Photos taken January 17<br />
    21. 21. ..but early-season weed control is crucial<br />+ 5.3 bushels<br />Perkins 2010-11<br />
    22. 22. ..but early-season weed control is crucial<br />+ 5.3 bushels<br />Similar results were also observed at the trial at Perkins<br />Perkins 2010-11<br />
    23. 23. Timing is crucial with Axiom.It must be applied when ryegrass is in the 1-2 leaf growth stage.<br />
    24. 24. For 2011-2012 crop:<br />To maximize Italian ryegrass control:<br />Axial XL POST<br />To maximize yield:<br />Axiom early-POST<br />To maximize control and yield:<br />Axiom followed-by Axial XL<br />
    25. 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 />

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