Fall webworm. Photo courtesy of entoplp.okstate.edu
About Fall Webworms
Fall webworm is a defoliating caterpillar found in eastern and central US, from Canada to the Gulf of Mexico. The caterpillar can have either a darkish body with a light stripe down the back or yellow green with a dark stripe down the middle of the back, about 1 inch long and with long, whitish hairs. It commonly attacks birch, cherry, mulberry, alder, willow, cottonwood, and crabapple. The caterpillars live and feed on the foliage inside the tents they make at the branch tips. As they grow, they expand their webs. The webs are unsightly but the actual damage to the tree is usually minimal unless infestation is severe.
Host Trees for Fall Webworm
Crabapple, Birch, Willow, Cottonwood.
Treatments for Fall Webworms
Trees with Fall Webworm can be treated with: TREE-äge®*, ACE-jet or AzaSol™.
Learn More About Common Tree Pests & Treatments
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*Important: Always read and follow label instructions before buying or using these products. The instructions contain important conditions of sale, including limitations of warranty and remedy. TREE-äge® Insecticide is a Restricted Use Pesticide and must only be sold to and applied by a state certified applicator. TREE-äge® is not registered for use in all states. Please check with your state or local extension service prior to buying or using this product. TREE-äge® is a registered trademark of Arborjet, Inc.
