Asked July 21, 2021, 9:02 PM EDT
Wright County Minnesota
Bronzed cutworm caterpillars (Nephelodes minians Guenee) are native to Minnesota and overwinter as eggs in weedy or grassy areas. They are nocturnal and usually hide during the day. Fully grown larvae are slightly larger than 1 1/2 to 2 inches long. The huge number of the bronzed cutworm near your yard can result in lawn injury. Cutworms usually dig a burrow in the ground. At night they emerge and clip off grass blades. This feeding damage appears as circular spots of dead grass or sunken spots. Turf grass is normally able to outgrow bronzed cutworm activity, unless it is already stressed by drought. It is possible that the current dry conditions could prevent the lawns from recovering from the feeding if the turf is not watered. Examples of common pesticides effective against cutworms are carbaryl, cyfluthrin and permethrin.