Frass (insect waste) on blueberries

Denise Attaway  |  5/25/2011 12:17:00 AM

Cranberry fruitworm. Photo by Jerry A. Payne, USDA, www.bugwood.org. Used with permission.

Go to Blueberry Insect Pest Guide




Go to Blueberry Insect Pests Home Page




Click on the links above to go to the Blueberry Insect Pest Guide home page or the Blueberry Insect Pests home page.


Frass is insect debris (waste or poop). Two insects can be identified on blueberries by the frass they leave behind. Click on the links below for information about what damage these insects can do to blueberries and how these insects can be managed.

Blueberry tip borer  causes damage by feeding internally. This feeding causes the stems to wilt and the leaves to dry from the tips. Pruning infested shoots can help suppress populations.

Cranberry fruitworm is one of the most serious pests of blueberries in the eastern United States. Some fields have suffered 50 percent to 70 percent fruit loss. Infested berries may be harvested and packaged without detection, resulting in consumers finding larvae in packaged berries.

More research-based information to help producers grow and maintain blueberry crops is available at eXtension.

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