Sod Webworms are the larvae of the tan moths seen flying over the lawn during late spring and summer. They feed on the root of the grass plants, leaving the lawn brown and ragged looking.
Recommendations: An insecticide treatment is recommended to take care of any sod webworms feeding at the time of application. In severe cases, more than one may need to be applied. This application will need to be watered in to be effective. Once you have seen the adult, in most cases, it is too late to treat.
In the damaged areas, reseeding is also recommended. 