description Fall webworm moth Overview
The fall webworm moth, Hyphantria cunea, is a moth in the family Erebidae whose caterpillars feed communally inside loose silk webs. The larvae build the webs over the leaves and branch tips of many host trees and shrubs, enlarging them as they eat, and the nests are the species' main field sign. Native to North America, the moth has also become established in parts of Europe and Asia, where larval feeding can defoliate ornamental, fruit, and forest trees.
help Fall webworm moth FAQ
Why do fall webworm caterpillars build silk webs?
The caterpillars live communally inside loose silk webs that cover leaves and branch tips. They enlarge the nests as they consume more foliage.
What trees do fall webworm caterpillars feed on?
Hyphantria cunea larvae feed on many host trees and shrubs rather than one single plant. Their webs can spread over the leaves and tips of branches as the group grows.
Is the fall webworm a moth or a caterpillar?
The fall webworm is the moth species Hyphantria cunea, while the web-building stage is its caterpillar. The species belongs to the family Erebidae.
Do fall webworm nests move as the caterpillars eat?
The larvae enlarge their loose silk webs over leaves and branch tips as they feed. The nest therefore becomes larger and more visible during the communal feeding period.
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