Dogwood Tree Leaf Diseases

Symptoms are small inch tan spots with reddish purple borders.

Dogwood tree leaf diseases. Dogwood clubgall midge resseliella clavula the dogwood clubgall midge is responsible for spindle shaped swellings near the tips of dogwood twigs. The initial symptoms appear as medium to large purple bordered leaf spots and scorched tan blotches. Leaves are smaller than normal light green and exhibit premature fall leaf coloration. There are any number of diseases and pests that can stress your dogwood and cause dogwood leaf drop.

Anthracnose disease spreads very quickly and it is critical to identify it during its nascent stage. This disease is caused by the fungus elsinoe corni one of the most common leaf diseases of flowering dogwoods. The canker slowly girdles the tree. These gradually extend to the trunk of the tree with necrotic weeping areas.

Leaf infections called leafspots are caused by a variety of fungi and some bacteria on many trees. The adult midge is a small delicate brown fly. Canker disease generally appears as sunken areas filled with dead tissue on the dogwood s bark. This disease occurs only if weather conditions are very wet and humid in the spring.

This disease propagates quickly in cool slightly wet conditions that are associated with the late spring and fall season. The shoots are also killed in this disease. Symptoms begin on leaf borders with purplish blotches that eventually cover the leaf. Fungal growth appears on the.

It is caused by the discula fungus. The anthracnose disease affects flowering varieties of dogwoods like the pacific dogwood. It starts out with blighted leaves showing purple margins and tan color around the edges of leaves. Secondary signs may include cankers on twigs and smaller branches.

Caused by the fungus discula destructiva anthracnose thrives in moist shade. Twigs and large branches die as a canker forms at the base of the tree. Dogwood anthracnose is one of the most common fungal diseases to attack this plant. The flower bracts are usually attacked first and then the leaves young shoots and fruit of dogwoods primarily during wet spring weather.

Warm dry weather will curtail the disease. When leaves are falling off dogwood in summer it could mean a serious illness improper siting or cultivation problems. The infection is manifested in the form of leaf spots and stem cankers. The adult midges emerge in may and the female deposits eggs in new terminal leaves.

Dogwood anthracnose is the most common disease that affects dogwood trees. One of the very common diseases of dogwood trees is the dogwood anthracnose which is caused by the fungus discula sp. Positive identification usually requires laboratory diagnosis. Symptoms of leaf spot disease.