Adult sod webworms are small beige butterflies usually seen when disturbed by a lawn mower or people walking on the grass. They are often seen all over the yard in June, at the time of egg laying. At the adult stage, the sod webworm is not damaging to the lawn, but the larval stage is very damaging. The damage is often seen in early September. The larvae is beige and brown with lines on the back. It can measure up to 2 inches long and lives in the thatched grass, feeding on stems and blades of grass. As soon as our Experts find sod webworms in your lawn, they use the necessary methods to eliminate them.