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American plum borer

Euzophera semifuneralis (Walker)
Lepidoptera: Pyralidae

The adult is a light grayish brown moth with reddish brown forewings marked by wavy black and brown vertical bands about two-thirds the distance from the base (A). The larva ranges in color from grayish green to grayish purple, with a yellow to brown head capsule, cervical shield and anal plate (B).

Distribution

Most fruit-growing states and provinces in eastern North America.

Damage

Attacks plum, cherry, and apple. Larvae feed in the cambium layer of trunk or scaffolds (C), which they can access only through openings created by mechanical damage, disease, sunscald, winter injury, etc. Because they feed horizontally, girdling can eventually occur; drought conditions intensify feeding effects.

Management

Species presence and flight activity can be monitored with pheromone traps. Minimize trunk damage caused by mechanical harvesting and cankers; coarse insecticide sprays may be applied to trunk shortly after petal fall and again, if necessary, in midsummer.

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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.