Dogwood Tree Disease Leaves. There are any number of diseases and pests that can stress your dogwood and cause dogwood leaf drop. Some dogwood varieties grow red berries during the early winter season.

Florida are resistant to anthracnose and decline and should be used to replace dying trees. Root rots and canker disease abound and thrive in. The initial symptoms include small circular to elongated reddish purple spots that appear in early spring.
Root rots borers crown canker.
The tree usually dies in three to five years. It is usually only cosmetic. When leaves are falling off dogwood in summer it could mean a serious illness improper siting or cultivation problems. Dogwood anthracnose is the most common disease that affects dogwood trees.