Protecting trees and forests

Forest Tent Caterpillar

Forest tent caterpillar is a native insect that is a natural part of our ecosystem. At times, as in the summer of 2016, forest tent caterpillars can cause extensive defoliation in hardwood forests. Defoliation can stress trees, but most trees will recover.

We will provide updates on outbreaks as more information becomes available.

The Basics

2016 Forest Tent Caterpillar Damage (click images for a larger view)

Aerial view of forest tent caterpillar defoliation over Lancaster/Kilkenny, NH. Photo by Ryan Hanavan, U.S. Forest Service  Forest tent caterpillar defoliation from Mt. Cabot, Kilkenny, NH