What Are These?

bikerdoc5968 Z6 SE MIOctober 3, 2013

This year my very old oak had not produced any acorns. I know acorn production varies year over year, but this year NOT ONE! Instead, these fury little irregular balls are falling in huge numbers on a daily basis. They are green inside and soft. What are they? Some kind of insect infestation... I can't believe they are aborted acorns.

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rhizo_1 (North AL) zone 7

Those are a type of leaf gall called a fuzzy oak gall. This gall is caused by a teensy wasp...the wasp larva develops inside the gall, feeding on it as it grows into an adult wasp.

These galls are not considered at all harmful to the tree.

    Bookmark   October 3, 2013 at 1:41PM
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