The 2 primary foliar diseases are Maple Anthracnose and Tar Spot. These fungal diseases are not considered to be “life threatening” to maple trees. If an infected tree is in relatively good health, it can withstand these leaf fungal diseases. You can reduce the number of spores that cause anthracnose and tar spot by raking up and discarding fallen, infected leaves.
The Village of Fox Point does not apply fungicides to prevent or cure these leaf diseases.