Black spots on leaves of tree

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 tar spot horticulture

1 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...