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Extension > Garden > Diagnose a problem > What insect is this? > Trees and shrubs > Caterpillars, maggots, grubs, and similar immature insects - 1 to 2 inches long > Fall webworm

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Fall webworm

Hyphantria cunea

Fall webworm

Whitney Cranshaw, Bugwood.org


Description: 1 inch long. Variable head and body colors- black heads with light green to yellow bodies with shaggy blonde hairs to red heads with darker bodies and shaggy reddish-brown hairs. Pairs of dark spots on each back segment.

Where/When: Attacks many hardwood trees, including ash, black walnut, chokecherry, cottonwood, elm, mountain-ash, and willow. Present July through September.

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