Black spots on leaves of tree - Ask Extension
Our maple (or is it an oak) tree seems to be suffering. The leaves are covered with big black spots.
Can you please tell me what this is? I'm also wo...
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Black spots on leaves of tree #427509
Asked September 18, 2017, 9:12 PM EDT
Our maple (or is it an oak) tree seems to be suffering. The leaves are covered with big black spots.
Can you please tell me what this is? I'm also wondering if there's a solution.
Ramsey County Minnesota
Expert Response
It is a maple and it is tar spot, a common fungal infection on maples. Tar spot is usually only a cosmetic problem and rarely requires treatment:
http://www.mortonarb.org/trees-plants/tree-and-plant-advice/help-diseases/tar-spot-maple-rhytisma-sp...
http://www.mortonarb.org/trees-plants/tree-and-plant-advice/help-diseases/tar-spot-maple-rhytisma-sp...
