How can herbicide drift accidentally damage crop plants?

Herbicide drift occurs when chemical agents applied to control weeds are inadvertently carried by wind or air currents away from the intended target area, leading to accidental contact with nontarget crop plants. This phenomenon poses a significant risk to agricultural production, as many herbicides—particularly nonselective ones like glyphosate—are toxic to most plant species upon contact with their foliage.123

When these chemicals drift onto sensitive crops, they can cause substantial damage or mortality, as the plants may not possess the specific genetic resistance engineered into herbicide-resistant crops. The severity of the impact often depends on the type of herbicide; for instance, translocated herbicides can be absorbed by the plant and transported to other organs, potentially causing systemic harm.12

To mitigate these risks, farmers and applicators are encouraged to follow strict management practices, such as adhering to updated product labeling that provides guidance on drift prevention. Because the accidental injury of crops through drift is a well-documented challenge, careful application and the integration of diverse weed-management strategies remain essential to protecting agricultural yields and environmental health.23