Iowa State University (ISU) Extension weed scientists are re­­commending only pre-emergence applications of dicamba on Roundup Ready 2 Xtend soybean fields in 2018 after widespread reports of off-target damage oc­­curred this year.

“We are fully aware that this very much limits the utility of the technology,” Extension Weed Specialist Mike Owen said last week at the annual ISU Integrated Crop Management Conference in Ames. “We (feel) the benefits do not outweigh the risks.”

New low-volatility dicamba formulations, including BASF’s Engenia and Monsanto’s Xtendimax with ...