Grass blades are chewed unevenly along the edges. In newly seeded lawns, young grass plants may be chewed or cut off near the ground. When a section of grass is peeled back, thick-bodied gray, brown, or black worms, 1 1/2 to 2 inches long, may be found in the thatch. The worms curl up and lie still when disturbed. Cutworms are primarily a problem in early and late summer. In the adult stage, cutworms become dark, night-flying moths.
Remove excess thatch to reduce cutworms'' daytime habitat.