Recently, Bayer reported a suspected dicamba resistant waterhemp population in Iowa. Now, Corteva has also discovered a suspected 2,4-D resistant waterhemp population in Wright County. Meaghan Anderson, extension field specialist with Iowa State University Extension and Outreach, said more studies will be done first before they can be certain that this population is resistant to 2,4-D.
This population was found in a ditch, which does change things a little bit, but Anderson said it’s still a warning of what can happen if we continue to overuse 2,4-D.
Instead of relying on 2,4-D alone for weed management, Anderson said farmers need to have a full weed management program to slow the evolution of herbicide resistance while still controlling weeds like waterhemp.
Anderson said it’s especially important to focus on diversifying because we’re not going to see another chemical that’s as effective as glyphosate.
Anderson added that, even though weeds in general are becoming more resistant to herbicides, she is confident that farmers will be able to adapt their practices.
Click here for the full report on this finding.
