"Apple canker is a disease caused by a fungus, Neonectria ditissima, which attacks thebark of apples and some other trees, causing a sunken area of dead bark and, eventually, death of the branch.

By Aislinn Sarnacki Have you ever noticed how much tree bark varies in texture, color and pattern? If your answer is “no,” I ...

Butternut canker can cause large dead spots on the tree and can even girdle the tree and kill it before ... The toothed leaflets are green in the summer and yellow in the fall. The bark is light gray ...