Gum Tree Leaf Diseases
These leaf spot diseases affect all shade trees including the black gum tree according to the university of illinois extension.
Gum tree leaf diseases. Leaves turn yellow and drop and it is common to see eucalyptus trees dropping their branches as the disease takes hold. This type of rot causes roots to die which can stunt the tree s growth and cause early fall colors of its leaves. Blights might be caused by drought conditions but little is known about these types of diseases of the sweet gum. Leaf spots multiply at the end of the growing season.
The symptoms include raised black spots with ragged edges on leaves. Cercospora is a fungal spot disease that produces dark brown bordered angular to circular spots 2 to 10 mm in diameter on both sides of leaves. Black leaf spot is one of several leaf spot diseases caused by fungus.