Fall Webworm as their name implies used to occur later in the growing season with webs becoming present in many types of trees canopies from mid-August through September. As of late these caterpillars are having two generations per growing season in the southern portion of our region for the first time due to warming temperatures and are making their presence known by constructing their webbed tents as early as June. A second generation of this pest in one season puts trees and shrubs at risk of being infested twice, an increase in the pest population in the landscape and their spread from the original host plant to surrounding landscape plants. Contact your professionals at North Eastern Tree Care if you see these tents forming to learn how to prevent them from causing damage to your ornamental trees and shrubs.
Adult Webworm females lay eggs on the bottom of leaves. After the caterpillars hatch they immediately start eating foliage and building a tent like web to cover and protect themselves from predators. They feed on a wide variety of trees including alder, elm, oak, hickory, birch, cherry, apple and willow to name a few. Their webs are not only unsightly but large populations feeding on young or newly planted shade trees, ornamental trees and shrubs can affect the plants health and appearance long-term. There are several ways to control this pest, call your professionals at Northeastern tree care today to learn how to protect your plants from Fall Webworm.