Sod Webworm larvae are surface feeders that burrow in the thatch layer of lawns. They line their tunnels with a silk like material that looks like little cobwebs on the surface of the lawn. The adults are small tan moths. They often fly out of the grass when it is being mowed or when they are disturbed. The adult moths will be seen about three weeks before any damage appears.

Life Cycle:
The adults emerge by late May or early June and lay their eggs throughout the lawn. When the larvae emerge from the egg they begin feeding immediately. Damage is caused by the larvae chewing off the grass stems and leaves. The dead patches of grass will pull away easily in clumps revealing masses of silk-like material with green excrement (frass) left by the larvae.

Control:
The best time to control the sod webworm is when they are young and actively feeding. By early fall they begin to transform into adults at which point they are very difficult to control. It is possible to have two generations born and mature in the same season. If you notice a lot of moths or webs in your lawn accompanied with dead areas, contact Kendall Lawn Care for an accurate diagnosis and treatment.