Black Spots on Your Maple Tree Leaves?

Capac, Michigan's maple trees are facing an increasingly common fungal disease known as tar spot. Caused by fungi in the genus Rhytisma, particularly Rhytisma acerinum, this condition creates distinctive black, tar-like spots on maple leaves.

While alarming in appearance, tar spot is primarily a cosmetic issue that rarely threatens the overall health of established trees. The disease cycle begins in spring when spores from fallen leaves infect new foliage. By late summer, infected leaves display yellowish spots that gradually develop into raised, black lesions resembling drops of tar.

For Capac residents concerned about their maples several management strategies can help:

1. Rake and destroy fallen leaves in autumn to reduce next year's inoculum
2. Improve air circulation around trees through proper pruning
3. Apply two or three fungicide treatments for tar spot in the spring
4. Set up a deep-root fertilization to keep your maple tree healthy

In severe cases, fungicide applications in spring may be warranted. While tar spot can cause premature leaf drop in heavily infected trees, it rarely impacts long-term tree health. By implementing good sanitation practices and maintaining overall tree vigor, Capac's maple owners can minimize the visual impact of tar spot and preserve the beauty of their leafy canopies. Remember, a few spots don't spell doom for your maples. With proper care and understanding, Capac's maples can continue to thrive despite this unsightly but generally harmless fungal visitor.

Contact Owen Tree and Lawn Care at 800-724-6680 to have your maple trees inspected or to set up a fungicide program to control tar spot fungus.