Gnarled Oak Leaf Midge Galls

Gnarly Oak Galls on Pin Oaks

Gnarly-looking leaf galls are appearing on pin oaks in southwest Ohio. The unsightly, lumpy growths are produced by a gnat-like gall-midge, so I’ve commonly called the plant growths Gnarled Oak Leaf Midge Galls. Not very creative, but descriptive.
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Authors
Joe Boggs