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Choreutis pariana (Clerck)
Psorosina hammondi (Riley)
Bucculatrix canadensisella Chambers


Apple-and-thorn skeletonizer: Choreutidae Choreutis pariana (Clerck)
Appleleaf skeletonizer: Pyralidae Psorosina hammondi (Riley)
Birch skeletonizer: Bucculatricidae Bucculatrix canadensisella Chambers

The adults of the skeletonizers are brown and short, with transverse bands (A, B) on each forewing. The larvae are yellow to pale green with numerous hairy discs on each segment of the body (C).


C. pariana: Most fruit-growing states and provinces in eastern North America and south to VA.
P. hammondi: Southeastern Canada and south through the central and mid-Atlantic states.
B. canadensisella: Mainly southeastern Canada.


Attack apple and other fruit trees. Larvae of the skeletonizers feed on the upper leaf surface, leaving only the veins and the lower epidermis of the leaf. C. pariana creates webbing in leaf creases.


These insects cause few problems. The removal and destruction of affected branches is usually sufficient to eliminate the caterpillars observed on the trees.

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The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.