Gall-producing mites


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

maple spindle
Maple spindle gall on sugar maple.


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

maple bladder gall Erineum patches
Left: Maple bladder gall on silver maple. Right: Erineum patches on undersides of silver maple leaves.

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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.