Source: University of Missouri
When it comes to weed pests, glyphosate-resistant waterhemp tops the list, but resistant giant ragweed may be the challenger.
"Giant ragweed certainly has my attention," Kevin Bradley, University of Missouri Extension weed scientist, told pest management field day visitors at MU Bradford Farm. "We'll focus our research on giant ragweed, both resistant and not."
Bradley considers the resistant waterhemp a statewide problem. "We're not focusing on anymore surveys of waterhemp," Bradley said. "I'm confident it is just about everywhere corn and soybeans are grown."