Cutworms attack both newly seeded and established lawns. A single cutworm can sever the stems of many young grass plants in a single night. They also chew the edges of the blades. Cutworms spend days hidden in debris or in the thatch layer of the lawn. They feed only at night and are active throughout the growing season. In the adult stage, cutworms become dark, night-flying moths with bands or stripes on their forewings.
Remove excess thatch to reduce cutworms'' daytime habitat.