Giant Ragweed Control In Soybeans

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Giant ragweed control in soybeans.

Roundup ready and liberty link fields in this situation should generally be treated with the maximum rate of herbicide allowed 1 5 lbs ae a of glyphosate or 36 oz of liberty. 2 2 and soil test p and k levels of 31 ppm and 123 ppm respectively. If wet weather has delayed postemergence herbicide application to your soybeanfields there may be some large giant ragweed that needs treating. Giant and common ragweed johnsongrass and marestail all produce spring growth that can reduce winter wheat harvesting efficiency and may lead to dockage from increased moisture and foreign matter.

Marestail is the one weed in this group that can often be adequately controlled with residual herbicides assuming an effective burndown. Remember individual results may vary so always read and follow label directions. Cobra comes in third place. Studies and results in depth looks at two more tough to control weeds and a table of rainfast times for common products.

Effective control of giant ragweed has relied heavily on the use of herbicides. In soybean there are fewer herbicide options for controlling giant ragweed than in corn. Mark loux ohio state university recommends using the full rate of herbicideallowed in roundup ready or liberty link fields. If you don t have als resistant ragweed firstrate is our 1 choice.

Behnken annette kyllo and reed searcy the objective of this trial was to evaluate herbicide programs for giant ragweed control in soybeans in southeastern minnesota in 2016. Giant ragweed control was 10 percent greater with authority first sonic at a 6 4 oz a application rate than at the 4 5 oz a. The research site was a loamy sand series with ph of 6 4 o m. Programs and options for soybeans plus other valuable resources.

The wet season has delayed crop development and postemergence herbicide applications in many soybean fields and there are some large giant ragweed waiting to be treated. Common and giant ragweed i ll group these together because the control options are similar. Roundup ready and liberty link fields in this situation should generally be treated with the maximum rate of herbicide allowed 1 5 pounds ae a of glyphosate or 36 ounces. The wet season has delayed crop development and post emergence herbicide applications in many soybean fields and there are some large giant ragweed waiting to be treated.

Breitenbach fritz r lisa m. Prior to the wide spread use of roundup ready soybean als inhibiting herbicides such as firstrate and classic were used extensively for giant ragweed control.