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Norwegian maple tree
What is the issue with this tree? What are the black spots?
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The plant appears healthy.
Tar Spot. Symptoms: Begins as yellow spots on leaves before turning into tar-like, black spots Causes: The Rhytisma fungus (R. punctatum) Treatment: None. Prevention is the best method; clearing away infected leaves that have fallen to the ground also lessens the chance of maple spider mites and box elder bugs hiding and multiplying in the leaf litter. Season: Late summer, early fall Risk Level: Low. Not life-threatening to the tree; only affects its appearance. Found this info on Google.
