Illinois farmers know waterhemp is a challenge to control in corn and soybean fields. What many don’t know is that this tough weed is now demonstrating resistance to multiple herbicides, according to Aaron Hager, University of Illinois Extension weed specialist.
He says that of the 100 Illinois fields the university tested in 2011, roughly one-third contained plants that demonstrated resistance to three different active ingredients.
"Unfortunately, this is going to be even more of a challenge in our state moving forward," he says.
Hager adds that he believes multiple resistance issues are showing up in other states as well.
Farm Journal caught up with Hager during the Bayer CropScience Ag Issues Forum, where he provided more insight on the problem and solutions farmers might want to implement this season. Hear more about his concerns and recommendations in the following video.