Because soybeans can recover, both he and Johnson cautioned farmers about avoiding PPO-inhibitor herbicides going forward.
“The increased amount of injury to soybean this year might cause some of our producers to avoid these particular herbicides in the future,” Johnson said. “We have seen exceptional weed control out of these PPO-inhibiting herbicides at our Palmer amaranth research site this season, and would encourage growers to continue to use these valuable tools.
“Producers need to weigh the risk of temporary injury against quality control of problematic weeds, such as Palmer amaranth, common waterhemp and marestail. In the majority of years, these products pose little threat of soybean injury.”
Growers who suspect soybean herbicide injury can submit a sample to Purdue’s Plant and Pest Diagnostic Laboratory for further confirmation.
— Rushville Republican