Localized populations of these species found on headlands or field margins likely represent a new introduction. Populations that are distributed throughout fields are likely a sign that these species have gone undetected for more than one year.

According to a draft ecological assessment on the EPA’s website, the agency has recorded 3,500 new incidents of off-target dicamba incidents in the 2021 growing season alone.

Soybean cupping observed in parts of Iowa probably isn't the result of glufosinate or 2,4-D choline, according to Iowa State professor Prashant Jha. The most likely culprit is dicamba on non-dicamba-resistant soybeans. Nearby tomatoes also aren't a good indicator of whether or not dicamba may have wandered afield.

When No-Till Farmer (NTF) got its start in 1972, its pages were filled with tips on how to make herbicides like paraquat, atrazine, 2,4-D, Princep and Banvel (an early dicamba formulation) work in no-till systems. In Part 1 of this series, we’ll look at the most important early herbicides for no-tillers. The No-Till History series is made possible by Calmer Corn Heads.