“Battling herbicide resistance” from the September 2014 issue of Landscape Management fixes on weed resistance in the lawn care industry. Here, we offer a chart on common turf herbicide modes of action.

Turf scientist have discovered weeds become resistant to herbicides due to lack of diversified weed management methods. When managers find an effective herbicide, then use it year in and year out without rotating in different products, weeds build resistance to the herbicide’s mode of action (MOA), scientists say.

Reference the table shown at right for information on MOAs and classification of common turfgrass herbicide site of action, compiled from the publication, “Preventing and Managing Herbicide-Resistant Weeds in Turfgrass” by Jay McCurdy, assistant extension professor of plant and soil sciences at Mississippi State University.