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foliage off entire branches of trees. The good news is that minor feeding this late in the season does no damage to established trees. The leaves are going to fall off soon anyway, so treatment is not necessary.
Small, or newly planted trees in danger of complete defoliation may warrant treatment. In many cases, caterpillars can be knocked out of small trees by shaking branches.
Two other species of caterpillars that have caused minor defoliation recently are the green striped mapleworm and the redhumped caterpillar. The mapleworm is primarily a pest on maple, while the redhump is a general feeder on many types of trees. Again, their defoliation is usually too
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