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U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Lymantria dispar dispar

The Lymantria dispar dispar is a non-native insect established in 19 states, the District of Columbia, and neighboring parts of eastern Canada. Historically it has been the most destructive pest of oak-dominated hardwood forests in the east, and during extended outbreaks can cause mortality of large areas of urban and rural forests. The USDA program to manage Lymantria dispar is a partnership with the Forest Service, APHIS, and state partners, to suppress outbreaks in the generally infested area, eradicate isolated infestations in the uninfested area, and slow the spread along the advancing front.

Lymantria dispar adults

Lymantria dispar adults. Male (bottom right) and female (left) Asian Lymantria dispar shown for comparison. Photo by USDA APHIS PPQ , USDA APHIS PPQ,

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