During this spring and early summer, there was a combination of cool days and nights with excessive amounts of rainfall and very few sunny days. These climatic conditions were most likely the cause of what we are seeing now with leaf fungal diseases impacting maple trees. Symptoms include, black and brown spots on leaves, curling/wrinkling of leaves and leaves falling prematurely.
The 2 primary foliar diseases are Maple Anthracnose (PDF) and Tar Spot (PDF). Please refer to the attachments below for more information on these two fungal diseases. 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 does not apply fungicides to prevent or cure these leaf diseases.