As larvae increase in size, the entire leaf, except for the principle veins, is consumed. Older larvae strip the leaves except for the petioles. The larvae molt four times before becoming fully grown in late July or early August. They then crawl down the tree trunk or drop to the ground. Pupation takes place in the litter or rarely, in the upper two inches of soil.
Some larvae spin a loose, silken cocoon in which to pupate.
Starvation and disease also bring an end to outbreaks. Refer to Cornell Recommendations for Pest Control for Commercial Production and Maintenance of Trees and Shrubs. Homeowners may use nonrestricted pesticides. If large forested areas are also affected, please contact the Department of Enviornmental Conservation. The insecticide name will appear in the product's trade name or in the ingredient statement on the product label.