Dogwood Tree Leaf Problems

If a tree has a lot of powdery mildew the overall health of the tree is affected due to minimized harvest.

Dogwood tree leaf problems. Alternifolia the pagoda dogwood c. One of the very common diseases of dogwood trees is the dogwood anthracnose which is caused by the fungus discula sp. Injuries can also be seen at the union of the trunk and branches or smaller twigs and branches. Sawflies resemble caterpillars often covered with white powdery material dogwood sawfly.

Dogwood borers synanthedon scitula dogwood trees attacked by borers clear winged moths which begin emerging in late may to september will display swollen knotty calloused or gall like areas on the trunk at or immediately below the ground surface possibly between the ground surface and the branches above. The tree usually dies in three to five years. The disease discula destructiva causes leaf twig and branch dieback beginning in the lower part of the tree. Many varieties of plants can get this fungal infection which cause leaves to get a white coating and eventually suffocate and die.

Sanguinea cvs are unfussy about their soil conditions but they are able to thrive in damp conditions where other shrubs might fail. Root rots and canker disease abound and thrive in moist conditions. Numerous small shoots may grow from the trunk. Spot anthracnose septoria leaf spot and powdery mildew are all conditions that affect the leaves.

This may further kill the entire leaf. The initial symptoms appear as medium to large purple bordered leaf spots and scorched tan blotches. Shrubby dogwoods grown for their winter stem colour cornus alba c. Leaves eaten or chewed.

Diseases of dogwood are the usual suspects when leaves are falling prematurely and include. Controversa the wedding cake tree c. Within a year or two the entire tree is affected. The infection is manifested in the form of leaf spots and stem cankers.

The adult pests tiny orange flies lay eggs on leaves. Officinalis are also tolerant of a range of soil conditions. This is a serious fungal disease of dogwoods that is prevalent in states east of missouri. Twigs and even large branches die.

Leaves are smaller and lighter green than normal and turn prematurely red in late summer. Treating dogwood leaf diseases. Leaf scorch powdery mildew drought conditions poor site conditions causes tree stress crown canker. These gradually extend to the trunk of the tree with necrotic weeping areas.

Young dogwoods are usually attacked at the crown. It spreads from leaves to the twigs down to the main stem forming cankers on it. A number of factors other than insects or diseases can contribute to the decline of dogwoods in the landscape especially mower injury over fertilization and poor growing conditions. One of the most recurring causes of leaf drop is powdery mildew.

Check with your local county extension office for help in treatment or contact a certified arborist. Mas the cornelian cherry and c. Dogwood clubgall midges resseliella clavula also tunnel into dogwoods. Crown canker caused by a fungus occurs primarily on transplanted dogwood trees.

There are listed fungicides and bacterial agents to combat the various disease issues affecting dogwood trees. Poor leaf color unhealthy plant growth twig dieback and even tree death are typical symptoms of distressed dogwoods. Trunk sprouts occur in the advanced stage.