Giant Ragweed Control In Soybeans

Following wheat harvest weeds may survive and be difficult to control in double cropped soybeans.

Giant ragweed control in soybeans.

Remember individual results may vary so always read and follow label directions. Effective control of giant ragweed has relied heavily on the use of herbicides. 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. Breitenbach fritz r lisa m.

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. 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. Common and giant ragweed i ll group these together because the control options are similar. Marestail is the one weed in this group that can often be adequately controlled with residual herbicides assuming an effective burndown.

Studies and results in depth looks at two more tough to control weeds and a table of rainfast times for common products. Residual control of marestail is essential in roundupready and nongmo soybeans since there are no postemergence options. 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. Cobra comes in third place.

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. If wet weather has delayed postemergence herbicide application to your soybeanfields there may be some large giant ragweed that needs treating. 2 2 and soil test p and k levels of 31 ppm and 123 ppm respectively. Programs and options for soybeans plus other valuable resources.

If you don t have als resistant ragweed firstrate is our 1 choice. In soybean there are fewer herbicide options for controlling giant ragweed than in corn. If you have a very dense population of giant ragweed on your farm improving control and reducing weed density by an additional 10 will help the postemergence program clean up the remaining giant ragweed in your field. The research site was a loamy sand series with ph of 6 4 o m.

Flexstar is 2 and an awfully good tankmix partner for firstrate. Mark loux ohio state university recommends using the full rate of herbicideallowed in roundup ready or liberty link fields.