Weeds are emerging and many postemergence herbicide applications are taking place in soybeans.  If spraying dicamba-tolerant soybeans with approved dicamba formulations, please remember to follow the application requirements. This will help preserve this technology for many years to come, ensure effective weed control and reduce the risk of injury to non-target crops.

With many soybean fields planted early, it is important to note that the federal label states that applications can only be made to dicamba-tolerant soybeans prior to the R1 growth stage (one open flower at any node of the main stem) or within 45 days of the soybean planting date, whichever comes first. Soybeans traditionally begin to flower shortly before or after the summer solstice (June 21st) and maybe a little later in late planting seasons. This can also happen a little earlier in soybeans planted early.  The 45 days after planting restriction is rapidly approaching for soybeans that were planted in the April 20th timeframe, so it is important to wrap those applications up within the legal window.  Always follow the label to reduce the risk of injury to non-target crops.

Also, remember that if the application window for dicamba sprays has passed, there are other herbicide options for weed control. For example, a product like Cobra® or Flexstar® would be a viable option for control of problematic weeds. Nonetheless, these products need to be applied to small weeds and coverage is essential for effective weed control to be accomplished. 

As the application cutoff date approaches, follow the dicamba label and best management practices, to keep this product as an effective and viable tool for weed management. If you have questions regarding dicamba applications and stewardship guidelines or other weed control options after the cutoff date, contact your local FS Crop Specialist.