Controlling a destructive pest. Dark gray, hairy gypsy moth larvae feed at night in June and July primarily on oaks, but also on other deciduous and evergreen trees and shrubs. Firmly established in the northeastern United States and southeastern Canada, this pest causes extensive and rapid defoliation.
In fall and winter, leek for tan, fuzzy, inch-long, oval egg masses on trunks and branches; scrape them off and drop them into a pail of warm, soapy water.
In May, after the larvae hatch, spray foliage with acephate, carbaryl, or Bacillus thuringiensis. Check with the Cooperative Extension Service for spray programs in your area.
When traveling out of an infested area, check your car, camper, and camping equipment for egg masses or cocoons.