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Maple Bladder Gall

Vasates quadripedes


The upper surface of silver and red maple leaves often become covered with small, red, round wart-like structures about 1/16 to 1/8-inch in diameter. These are maple bladder galls caused by a small mite, Vasates quadripedes (Shimer). The structures are generally noticed first in May, about the time the leaves have become fully expanded. At first the galls are green but they quickly turn pink to red and eventually black. Leaves frequently become so covered with the galls that they completely twist out of shape and may even drop early.


Noe and Pili
Noe and Pili 7 years ago

Thanks Courtney for your help!

CourtneyVerk 8 years ago

Looks really similar to my spotting.

Noe and Pili
Spotted by
Noe and Pili

Schönstedt, Freistaat Thüringen, Germany

Spotted on Jun 5, 2012
Submitted on Jun 27, 2012

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