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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Maximize yield and Italian ryegrass control with 2-pass herbicide programs
1. Maximize yield and Italian ryegrass control with 2-pass herbicide programs Joe ArmstrongOSU Extension Weeds Specialist
2. Crop rotation is the most effective tool for improving weed control in wheat
3. However, we still have many effective tools available in winter wheat
4. Fall weed control = highest yields 60 ≥ 85% weed control 55 50 Maverick Wheat yield (bu/ac) 45 Olympus 40 35 14 28 42 56 70 84 98 112 126 140 154 168 Days after planting
5. Fall weed control = highest yields 60 Despite still achieving ≥85% cheat control at 63 days after planting, yields had already decreased by nearly 5 bu/acre. ≥ 85% weed control 55 50 Maverick Wheat yield (bu/ac) 45 Olympus 40 35 14 28 42 56 70 84 98 112 126 140 154 168 Days after planting
6. PRE & Early POST herbicides Finesse Amber Maverick Axiom Prowl H2O
7. PRE & Early POST herbicides Preemergence and early-postemergence herbicides can be used to maximize early-season weed control
9. Excellent ryegrass control with Axial XL… Axial XL is very effective for postemergence ryegrass control. Axiom will control early-season ryegrass, but will provide season-long control. Preharvest ratings, Stillwater 2010-11
14. ..but early-season weed control is crucial + 6.6 bushels Even though Axiom didn’t provide season long ryegrass control, the yields were still higher since early-season competition was reduced Stillwater 2010-11
15. ..but early-season weed control is crucial + 6.6 bushels 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 Stillwater 2010-11
22. ..but early-season weed control is crucial + 5.3 bushels Similar results were also observed at the trial at Perkins Perkins 2010-11
23. Timing is crucial with Axiom.It must be applied when ryegrass is in the 1-2 leaf growth stage.
24. For 2011-2012 crop: To maximize Italian ryegrass control: Axial XL POST To maximize yield: Axiom early-POST To maximize control and yield: Axiom followed-by Axial XL
25. Contact information Joe Armstrong OSU Dept. of Plant and Soil Sciences joe.armstrong@okstate.edu Twitter: @OSUWeedSci www.weedscience.okstate.edu
Notas del editor
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.
