Gall-producing mites, Michigan trees, shrubs

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Gall-producing mites - Eriophyidae

Mites in this family are responsible for producing galls and dense patches of hair or beadlike growth called erinea on a number of plants. The size of the mites is less than 0.5 mm. Several commonly seen galls are: maple spindle gall, maple bladder gall, and erineum on maple.

Management: Treatment is not usually not necessary, as lasting harm to plants rarely occurs.


Maple spindle gall on sugar maple.	Maple bladder gall on silver maple.	Erineum patches on undersides of silver maple leaves.

Additional information

MSU Diagnostic Services for assistance in pest identification.
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This information was developed from A Pocket IPM Scouting Guide for Woody Landscape Plants by Diane Brown-Rytlewski. Purchase this in a pocket-sized guide for reference in the orchard from MSU Extension (publication E-2839).

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 7/09/07