Black Spots on Tree Bark (Red Maple)

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davidericpowell Deltona, FL Sep 02, 2017

A friend of mine has a red maple in zone 9A, and it's developed black spots on it's bark. It's already lost a limb and is looking really bad. Any ideas what this is and how it's treated. I'm curious if it's a cancker. Thoughts?

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Post #10321361
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ViburnumValley Scott County, KY(Zone 5b) Sep 02, 2017

That is treated with basal pruning.

It looks like that tree has a multitude of problems, including borer damage. There is so much damage/decline evident in those photos, that no "treatment" will make any difference.

Cut it down, and start over.

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