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Common Insects & Mites
Aphids
Asian lady beetle
Bark beetles
Brown marmorated stink bug
Brown soft scale
California gallfly
Conifer aphids
Cottony camellia scale
Cutworms and loopers
Earwigs
Eriophyid mites
Exotic longhorned beetles
Fall webworm
Inchworms
Leafhoppers
Leafminers
Leafrollers
Lecanium scale
Oystershell scale
Pamphilid sawflies
Pear slug
Root weevils
Sapsucker damage
Shothole borer
Skeletonizers
Slugs
Sowbugs, pillbugs, and millipedes
Spider mites
Spotted wing Drosophila (SWD)
Tent caterpillars
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Caption: Fall webworm
Photo by: S.J. Collman
Common Insects & Mites : Fall webworm
(revision date: 4/30/2013)
Use Integrated Pest Management (IPM) for successful plant problem management.
Biology
Fall webworm caterpillars feed on the foliage of a variety of trees and shrubs. Conspicuously hairy, they appear rusty tan with a dark, almost black, body color. Some populations have a lighter tan color phase. Large tents of this late-season pest become noticeable in late summer and early fall. Caterpillars are particularly fond of alder, cottonwood, walnut, and apple. They sometimes feed on apple fruit as well as foliage.
Management Options
Non-Chemical Management
Prune out and destroy caterpillar tents.
Select non-chemical management options as your first choice!
Chemical Management
IMPORTANT:
Visit Home and Garden Fact Sheets for more information on using pesticides
Pesticide applications are generally not recommended. If you choose to make an application, make certain that the pesticide applied is registered for the host and effective against the pest. Homeowners should not make foliar applications to trees over 10 ft tall. Consult a commercial pesticide applicator for treatment of trees and shrubs over 10 ft. tall.
Images
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Caption: Fall webworm
Photo by: S.J. Collman
Caption: Fall webworm tent on apple
Photo by: R.S. Byther