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Yellowjackets
Rufus Isaacs, MSU Entomology
Home > Scouting guide> yellowjackets
Yellowjackets and other wasps may break open grape berry skins during late summer. Early in the growing season, wasps are mainly predatory, but late in the season they begin to search for sugar, including ripened fruit. Destruction of nearby nests is effective but difficult because nests are often underground.
Yellow jacket
Yellowjacket feeding on ripe berry.

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Funding for this web site provided by Project GREEEN, American Farmland Trust, EPA Region 5's Strategic Agricultural Initiative program, The National Foundation for IPM Education, the Center for Agricultural Partnerships and the MSU Integrated Pest Management Program
in collaboration with MSU Extension and the Michigan Agricultural Experiment Station.
Updated 12/11/07 Contact: J.N. Landis.