What behavior do sod webworms exhibit in turf?

Sod webworms are known for their unique behavior of spinning silk webbing near the soil surface. This silk forms small, irregular webs over the turf. The presence of these webs is an indicator of their activity and can often be seen in areas where they are feeding. The webs also help protect the larvae from predators and environmental factors, allowing them to feed effectively on grass blades.

Their feeding is primarily on the leaves rather than the roots, which distinguishes their behavior from other pests that target root systems. While they do inhabit the soil, they do not burrow deep; instead, they reside just beneath the surface in thatch or soil where they feel secure. The construction of mounds is characteristic of other types of pests, such as certain types of ants or beetles, but not sod webworms. Understanding this behavior is crucial for proper identification and management of sod webworm infestations in turfgrass.