Dogwood Tree Disease Powdery Mildew

Banner maxx rubigan and eagle have provided better control over previously recommended fungicides.

Dogwood tree disease powdery mildew. In this video she talks about powdery mildew on do. We are recommending that you spray at least 6 hours prior to a rain. This disease is caused by the fungus elsinoe corni one of the most common leaf diseases of flowering dogwoods. The infection is manifested in the form of leaf spots and stem cankers.

Dogwoods are forest understory trees that grow best in partially shady sites with regular moisture and an annual application of organic matter such as leaf compost. Remove the infected tree and do not replace it with another woody ornamental until the soil has been fumigated and aerated. Powdery mildew is a powdery white to light gray colored fungus that will grow on succulent stems leaves buds and flowers. There are many powdery mildew diseases on many of the different plants that we grow but they don t go back and forth across the different species.

One of the very common diseases of dogwood trees is the dogwood anthracnose which is caused by the fungus discula sp. Disease resistant cultivars are available and reduce the chances of problems such as powdery mildew and spot anthracnose. The flower bracts are usually attacked first and then the leaves young shoots and fruit of dogwoods primarily during wet spring weather. Apply a fungicide to protect plants.

Powdery mildew usually attacks dogwood from mid to late may until frost in tennessee. In the southeast powdery mildew on dogwood is known to be caused by two different fungi microsphaera and phyllactinia. The canker slowly girdles the tree. Deprive powdery mildew of excess succulent dogwood growth to feed on by avoiding fertilizers with high nitrogen content.

During this time the tree flowers and fruits profusely but eventually dies. Join virginia tech plant pathologist mary ann hansen as she discusses common plant diseases in virginia. Today we re looking at powdery m. The shoots are also killed in this disease.

Prune out dead limbs that might be harboring fungi but do not trim infected. Powdery mildew on flowering dogwood hi i m james blake director of the clemson extension home garden information center. The initial symptoms appear as medium to large purple bordered leaf spots and scorched tan blotches. Young plants and new growth are usually more severely damaged than older plants leaves or branches.

Powdery mildew is a disease which is common on many ornamental trees and shrubs including dogwoods.