Around 300 different species. Lindens, red-leaf and variegated cultivars of Norway maple, wild grape, as well as members of the family Rosaceae (amelanchier, crabapples, mountain ash, purple leaf plum, roses and others) are particularly favored.
Look for adult beetles in late June to early July, as littleleaf linden begins bloom and Hills of Snow hydrangea is in full bloom. Adults often feed in a group, skeletonizing leaves with only a network of veins remaining when feeding damage is heavy. Larvae damage roots of turf.
Beetles are attracted to plants damaged by feeding, so control damage early. Pheromone traps and bait traps are not recommended as a strategy for trapping out beetles. Traps contain a floral lure to attract female beetles and a pheromone to attract males. It is possible to draw in more beetles from surrounding areas and to have greater damage resulting, particularly if traps become full.
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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.