Tent Caterpillars / Webworms

Crabapple tree with tent caterpillar infestation in May.

Description: Caterpillars that feed on a wide variety of trees and build “tents” or “webs” on tree branches.

Trees Affected: Most tree species, but prefer crabapple, cherry, birch, linden, and ash.

What to look for: Physical presence of webs or tents throughout the tree crown, skeletonized leaves, defoliated portions of trees, or feeding caterpillars.

Treatment Options: Insecticide applications if severe damage. Can hand pick or prune out infestations on smaller trees.