Gypsy Moth control can be accomplished in several ways.

* Scraping egg masses from trees, woodpiles, and outdoor furniture is the most effective means of control for homeowners. The egg masses can be immersed in soapy water, burned or buried. (Remember: Eggs scraped directly onto the ground may survive the winter months and still hatch in the spring).

* Natural enemies such as birds, feed on the larvae of the Gypsy Moth. Birdfeeders can attract and maintain these natural predators.

* Banding- Placing cloth bands on trees prevents caterpillars from traveling up and down the trees. Barrier bands, such as sticky bands, also prevent the movement of caterpillars.

* Biological and Chemical- Insecticides such as Bt, acephate, carbaryl and difluron can be used to control gypsy moths. Bt, Bacillus thuringienses, is a naturally occurring bacterium and is commercially used as an aerial spray. It is usually applied the third week in May when Gypsy Moth caterpillars are less than an inch long.

* Keeping trees healthy is very important in the control of the Gypsy Moth. Fertilizing, thinning, pruning, and watering trees during dry spells will help maintain the trees' health and minimize the effects of defoliation on the trees.

more info: http://www.ent.msu.edu/gypsyed/docs/control.html#Management