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IPM Scouting in Stone Fruits

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American plum borer - Euzophera semifuneralis (Walker)
IPM scouting in stone fruits > borers > American plum borer
American plum borer (APB) larvae feed on the cambium tissue of many fruit and ornamental trees. In stone fruits, APB is most problematic on cherries and plum but can also be a pest of peach and nectarine. Larvae require an opening to enter the cambium. Typically, they enter through splits in cherry bark from mechanical harvesters, and cankers in peaches, plums and cherries caused by various pathogens. They also infest black knot in plums. There are two generations per year in Michigan. First-generation adults begin to emerge at cherry white bud stage. Second-brood adult flight generally begins in early July, while peak activity often coincides with cherry harvest in July.
 
Adult American plant borer Adults are about 25 mm long. The forewings of males and females are reddish to grayish brown with a wavy band of black and brown markings toward the wing tips. The hind wings are pale brownish gray and fringed on the trailing edges.
APB larvae APB tunneling
American plum borer larvae Evidence of APB tunneling.
 Additional information
This information was developed from A Pocket Guide for IPM Scouting in Stone Fruits by David Epstein, Larry J. Gut, Alan L. Jones and Kimberly Maxson-Stein. Purchase this in a pocket-sized guide for reference in the orchard from MSU Extension (publication E-2840).
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 Michigan Agricultural Experiment Station, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.
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Updated 7/24/07