What are Webworms?
A defoliation caterpillar, the webworm is related to moths. They usually feed on the foliage of many deciduous trees. The webworm damages its host tree by eating away large quantities of foliage that can cause the branch to die back. This leads to patches of dead branches. In extreme cases of repetitive defoliation a tree can be stressed to the point of dying.
Treatment of Webworms
Webworms have multiple generations a year. By treating webworms when they first appear it decreases the amount that they will multiply later in the year. They usually first appear in mid to late June.
Trees that webworms feed on
Webworms usually target nut trees. The following are a list of trees that are susceptible.