Can you identify

Asked July 2, 2019, 11:55 AM EDT

I had some pictures sent to me via email. They would like to know what is going on with their Maple tree. I think there is two different problems happening. The first two pictures look like Maple tree Gall, the third looks like tar spots. I would just like a confirmation or an answer. Thanks,

Gladwin County Michigan leaf galls tar spot fungus

1 Response

Yes, gall mites are the culprits of the deformities in the leaves. The dark spots do appear to be tar spot. Neither the tar spot nor the mites are a cause for concern. Check out the following links:
https://wimastergardener.org/article/maple-gall-mites-eriophyidae/
https://www.canr.msu.edu/news/why_do_my_maple_leaves_have_spots
I hope this helps,