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Black or tar spot - maple tree #875067

Asked June 28, 2024, 9:45 AM EDT

Please confirm that this established maple tree has black or tar spot. I believe this is a benign or non-threatening issue. Thank you.

Oakland County Michigan

Expert Response

Hi,
I think this is actually a different but equally common fungal infection called anthracnose. There is still no action needed other than raking and bagging fallen leaves to prevent reinfection next season.
https://www.canr.msu.edu/news/maple_leaf_blister_and_anthracnose_two_foliar_diseases_that_can_appear_on_s
Ruth

An Ask Extension Expert Replied June 28, 2024, 3:28 PM EDT

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