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fungus? #930751

Asked May 05, 2026, 7:01 PM EDT

Can you help identify this growth on our (I think) cherry trees

Pope County Minnesota

Expert Response

That is black knot fungus. Quite common on cherry and other stone fruit trees, which can be controlled by pruning it off. Dispose of it after cutting off to reduce the spread of spores. Here is a link for more details: https://extension.umn.edu/plant-diseases/black-knot#pruning-out-galls-1170311

Paul -Tree Care Advisor volunteer

An Ask Extension Expert Replied May 05, 2026, 8:14 PM EDT

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fungus? #930751

Expert Response

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