With data through mid-October, the University of Missouri’s Integrated Pest Management program compiled dicamba damage reports from throughout the U.S.
There were 2,708 dicamba-related injury cases under investigation by various state departments of agriculture around the U.S. There were approximately 3.6 million acres of soybeans that were injured by off-site movement of dicamba.
Arkansas led the nation with 986 cases reported effecting roughly 900,000 acres. Illinois was second with 245 cases affecting 600,000 acres and Missouri was third with 319 cases and 310,000 acres affected.
The figures were gathered either in the form of official dicamba-related cases that are currently under investigation by the state departments of agriculture or as estimates of injured acreage from university extension weed scientists.
As the data was being compiled, the EPA and manufacturers came to an agreement on registration and labeling changes for dicamba, including making these products restricted-use, record-keeping requirements and certain additional spray drift mitigation measures.
Many state departments of agriculture are also deciding whether or not to impose additional state requirements for the use of these products in 2018.