Grapeleaf skeletonizer, Harrisina americana (Guerin)

This is taken primarily from an extension bulletin by D. G. Pfeiffer & P. B. Schultz, entitled "Major Insect and Mite Pests of Grape in Virginia" (Va. Coop. Ext. Serv. 444-567 (1986))
This species occurs widely in the eastern U.S.; a related species, the western grapeleaf skeletonizer (H. brillians Barnes & McDunnough), replaces it in the west. Pupae pass the winter in cocoons in debris on the ground. In late spring, adults emerge and eggs are deposited in yellow clusters on lower leaf surfaces. After hatching, larvae feed in upper leaf surfaces, often feeding side-by-side in a row. Young larvae skeletonize leaves; older larvae feed on entire leaves. Larvae are yellow with four black tubercles on each body segment. Adults are small, black, narrow-winged moths. There are two generations annually.

See page on grapeleaf skeletonizer on Virginia creeper, and California page on western grapeleaf skeletonizer

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