Sod webworms are caterpillars of small brown to dull gray moths. Webworms
grow to a length of nearly 3/4 inch and vary in color from pinkish white to
yellowish brown with a light to dark brown or black head. They are covered with
fine hairs. The moths have a wingspan of about 3/4 inch. They fold their wings
closely about their bodies when at rest and have a prominent forward projection
on the head. Moths hide in shrubbery or other sheltered spots during the day.
They fly over the grass in early evening. The female scatters eggs over the
lawns as she flies.
Sod webworms feed only at night. Damaged grass blades appear notched on
sides and are chewed raggedly. Irregular brown spots are the first signs of
damage. Large areas of grass may be damaged severely. A heavy infestation can
destroy a lawn in only a few days. Insecticide application should be timed for
treatment during early evening hours when caterpillars begin feeding on the
surface of the turf.
Sod Webworms can be controlled by treating areas with Talstar
One or with Acephate.
Lawn Pests Molecrickets
Chinch Bugs Spittlebugs