One of the main causes of a maple tree’s bark turning black is a fungus called Verticillium. … Eventually, the wood beneath the bark will become grotesque green and black, arranged in streaks, though the smallest branches on the tree may be free from this kind of discoloration.

How do you treat maple bark fungus?

Treatment: No cure, but some trees can recover with proper care. In severe cases, remove tree, fumigate soil, and plant a wilt-resistant species in its place. The best treatment is prevention through proper maintenance.

What does a sick maple tree look like?

Signs of maple wilt include scorched-looking leaves and diseased branches with unhealthy leaves. Occasionally olive-colored streaks can be found in the sapwood. Anthracnose – This disease results in extensive defoliation, shoot dieback, and twig death.