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Gypsy Moth Caterpillars Pupating into adult form for the future mating and egg laying

gypsy moth mass

Gypsy Moth Caterpillars in Branch Crotch on Maple Tree

gypsy moth eggs

Egg Mass on Trunk of a Maple Tree

adult male gypsy moth

Adult Gypsy Moth Male

Gypsy Moths


The gypsy moth is one of the most important forest pests in the Northeast. The caterpillars feed on leaves of forest, shade, ornamental and fruit trees, and shrubs. A single defoliation can kill some evergreens, but usually two or more defoliations are needed to kill hardwoods.

Cornell University Fact Sheet

Forest Health Fact Sheet

Gypsy Moth Management Guide for Homeowners

Btk Pesticide Treatment Info

How to Care for Defoliated Trees

How to Properly Water Your Trees


Don Gasiewicz
Natural Resources/Horticulture Program Manager
585-786-2251 ext 113

Last updated November 16, 2023