Blaze Orange Maple Tree Leaf Symptom

What is this black growth under leaves? For what it’s worth, a very old huge black walnut tree was cut down 2 years ago, approx 30 yards from our little 9 yr old maple. Thank you If you already sent the answer to this I missed it, and apologize.

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1 Comment To "Blaze Orange Maple Tree Leaf Symptom"

#1 Comment By BushDoctor On 12/14/2021 @ 3:21 pm

It is quite difficult to see, since the spot in question isn't quite in focus. What I can see looks like Maple Tar Spot (Rhytisma sp.).

This isn't usually fatal. Here is an article to help you with the disease and treamtent:

https://www.gardeningknowhow.com/ornamental/trees/maple/maple-tar-spot-disease.htm ^[1]

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