The grapeleaf skeletonizer (Harrisina americana) is a moth in the family Zygaenidae. It is widespread in the eastern half of the United States, [1] and commonly noticed defoliating grapes, especially of the Virginia creeper (Parthenocissus quinquefolia).

Adult moths of the first generation in the Central Valley emerge from hibernating pupa in early spring to June. The pale yellow or whitish capsule-shaped eggs are laid in clusters on the underside of grape leaves.

May 6, 2022 · The Western grapeleaf skeletonizer is a moth species common to the eastern half of the United States and the California wine regions. The larvae feed on the grapevine foliage as soon as they hatch, leaving individual leaves a skeletonized appearance.

Sep 3, 2023 · The Grape Leaf Skeletonizer is a type of moth whose larval stage is notorious for wreaking havoc on grapevines. Its scientific name is Harrisina americana, and it can be found in various regions across the United States.

Sep 3, 2023 · These pests, particularly the larvae of the grape leaf skeletonizer moth, Harrisina americana, feed on the leaves, leaving only the veins intact. There are several methods to control and prevent grape leaf skeletonizer infestations.

Grapeleaf skeletonizer moths have all-black wings that they typically hold flat, away from the body. There is an unbroken collar of red or orange behind the black head.

Apr 21, 2017 · Found on flowers in fields, etc. Adults are diurnal and nocturnal, and come to light. Larvae feed on grape foliage, and can be pests; may also feed on Redbud, Virginia Creeper. Adults take nectar. Yellow-collared Scape Moth (Cisseps fulvicollis) have more triangular-shaped wings, and lack scale tufts on the abdomen.

Monitor grapes for egg masses or larvae on the undersides of leaves after leaf expansion. Apply an insecticide (avermectin; Bacillus thuringiensis var. kurstaki; diamide; organophosphate; neonicitinoid; pyrethroid; spinosyn) to foliage when monitoring indicates small larvae are present.

Jan 31, 2025 · Its ten yellow bands of color are broken by eleven black hairy rings that can cause painful stings to humans. The spines can cause an allergic reaction that may require medical attention.

Western grapeleaf skeletonizer develops through four life stages: egg, larva, pupa, and adult. In California's Central Valley, adult moths of the first generation emerge from overwintering pupae in April and May.