Gum Tree Leaf Diseases. An especially harmful version of this disease is called anthracnose which attacks many tree species including dogwood and sycamore positive identification usually requires laboratory diagnosis. Leaf spot diseases weaken trees and shrubs by interrupting photosynthesis.
Cercospora is the most common of the many diseases of a sweet gum tree according to the florida department of agriculture and consumer services. Known as root collar foot or crown rot the disease shows itself first through discolored leaves and red brown or dark brown wood directly beneath the bark. And grows best in u s.
Heart or trunk rot is a fungus that destroys the tree from the inside out.
Younger trees are most susceptible. Leaf spots multiply at the end of the growing season. Younger trees are most susceptible. Normally this does not pose a danger to the tree.
