What is this on my birch’s leaves?

Asked August 25, 2020, 1:37 PM EDT

My river birch has these weird little bumps on several of its leaves. Is this an insect infestation I need to do something about? If so, what should I do?

Ramsey County Minnesota

1 Response

The bumps are leaf galls caused by insects or mites. Leaf galls seldom affect tree health so no control is recommended.

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