Why a Gypsy Moth Suppression Program?
The Gypsy Moth is a foreign pest with few native predators to keep populations in check. Caterpillars feed on tree leaves, preferring those of oak, aspen, poplar, and birch. When those are not available, other tree species and evergreens are also at risk. Large populations can defoliate entire wooded areas. Caterpillars in large numbers and their waste (frass) are a nuisance on residential property. Gypsy Moths can not be eradicated, but they can be suppressed to tolerable levels. What are the goals of this program? • Reduce high caterpillar populations to tolerable levels. • Reduce tree loss by preserving at least 60% tree foliage to prevent refoliation. • Prevent indiscriminate use of chemical controls. • Provide educational information. How are Gypsy Moth Populations Suppressed? The aerial application of Btk (Bacillus thuringiensis variety kurstaki) is used to reduce high populations of gypsy moth caterpillars at sites that meet MDA requirements for spraying. Bt is a naturally occur
