Canker Dogwood Tree Diseases Pictures. Both are canker diseases. The canker slowly girdles the tree.
However two dogwood tree diseases are potentially lethal to the trees. Twigs and large branches die as a canker forms at the base of the tree. This disease occurs only if weather conditions are very wet and humid in the spring.
Leaves are smaller than normal light green and exhibit premature fall leaf coloration.
Older trees may also be occasionally affected by mistletoe. You may be able to extend the life of the tree by just leaving. Maintaining healthy dogwood trees by following the recommended cultural practices is the first line of defense in reducing any of these problems. However two dogwood tree diseases are potentially lethal to the trees.
