Webworms

Webworm Control

Webworm is the common name applied to several species of webworms. All webworms are characterized by their habit of spinning large communal webs and the distinctive damage they do to plants. To create their webs, the webworm larvae weave webs with silk and feed on the leaves. Feeding on the leaves gives them a skeletonized appearance.

Webworms are frequently confused with bagworms. Bagworms are species of caterpillar that feed exclusively on cedars, arborvitae, and other conifers. They also do not make large masses of webbing. Each caterpillar spins an individual web that contains a mixture of plant leaves and spun silk. They are very difficult to control and handpicking is recommended.

Because of their webbing, it can be difficult to control them. However, sprays with Bacillus thuringiensis kurstaki, Spinosad or Neem Oil help achieve control.

Larvae are usually greenish in color with numerous black spots. They vary in size from ½ to 1 ½ inches in length.

Control products are shown below. For more information please see our Caterpillars and Moths Control page.

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