Once again, we are getting many questions about soybean fields that have abruptly demonstrated symptoms resembling those attributable to a plant growth regulator (PGR) herbicide such as 2,4-D, dicamba, or clopyralid. Given this spring's windy conditions, there is no question that some drift occurred. Furthermore, with the limited "field time" available, it is surprising that sprayer contamination calls were not more prevalent.
Iowa State University
Owen, Micheal D., "Soybean cupping prevalent in Iowa" (2004). Integrated Crop Management News. 1517.
The Iowa State University Digital Repository provides access to Integrated Crop Management News for historical purposes only. Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user. Users should make their own assessment of the information and whether it is suitable for their intended purpose. For current information on integrated crop management from Iowa State University Extension and Outreach, please visit https://crops.extension.iastate.edu/.