There are 33 different weed species in the United States that are resistant to one or more herbicide mechanisms of action.
After more than 70 years of use, only 7 species of weed have become resistant to 2,4-D, leaving it as an effective tool for managing weeds resistant to other herbicides.
Herbicide Resistance Management
“Twenty years ago, it would have been hard to predict the extensive uses and benefits that 2,4-D continues to have today. Even with the introduction of many new herbicides, farmers, professional applicators, and homeowners still rely on 2,4-D”