Hi,

Are you able to send me any pictures of your trees? It's difficult to diagnose what the issue may be without seeing them. It's helpful to have a close up photo of the issue and a wider shot show the environment the plants are growing in. You can add these using the blue square at the bottom of the dialog box where it says "choose them". You can send up to 3 photos at a time.

In the meantime, here are a couple of publications about issues Maples can have in Michigan.

https://www.canr.msu.edu/news/maple_leaf_blister_and_anthracnose_two_foliar_diseases_that_can_appear_on_s

https://www.canr.msu.edu/news/black_polka_dots_on_maple_tar_spot#:~:text=Tar%20spot%20is%20a%20foliar,vary%20substantially%20year%20to%20year.

If you do need to call us with a gardening question, please use the lawn and garden hotline which operates Monday, Wednesday and Friday mornings 9am-noon,<personal data hidden>.

Let me know if you would like other photos 

Thanks!

Thank you for these photos. After seeing these, the issue does not look disease related to me. Does this area ever flood or have standing water? Sometimes if trees are not well suited for a flood plain they may not thrive. They have problems getting adequate nutrition and oxygen to the roots when the soil is inundated with water. If this is the case, there's not much to be done except to plant species there that can tolerate those conditions.

the center for lakes page has some great resources for gardening near water: https://www.canr.msu.edu/cls/

https://www.canr.msu.edu/home_gardening/uploads/files/WaterfrontPlants-Shorelands-AA.pdf

If this area is not particularly wet, I'd recommend doing a soil test in that area since what you're seeing may be related to soil pH or nutrition.

I forgot to link to where you can get a soil test! https://homesoiltest.msu.edu/