Infested trees can be completely defoliated by hairy, red and blue spotted caterpillars that grow up to 2 ” long. Although many deciduous tree species will leaf out again, complete defoliation 2-3 years in a row is lethal. During heavy infestations, the rain of caterpillar excrement below trees can be a nuisance. White adult females can be found laying light brown egg masses from mid to late July through early August. On spruces, pines and Atlantic white cedar, loss of more than half the leaves can be lethal.
Call a Certified Arborist at Chatham Tree Services to diagnose your trees and determine if spraying is required!