Dogwood Tree Disease Powdery Mildew

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

Dogwood tree disease powdery mildew. Remove the infected tree and do not replace it with another woody ornamental until the soil has been fumigated and aerated. 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. Deprive powdery mildew of excess succulent dogwood growth to feed on by avoiding fertilizers with high nitrogen content. The flower bracts are usually attacked first and then the leaves young shoots and fruit of dogwoods primarily during wet spring weather.

These are systemic fungicides as are bayleton and cleary s. Some cultivars are more susceptible than others. During this time the tree flowers and fruits profusely but eventually dies. Powdery mildew grows on the outside of leaves and unlike many other bacterial or fungal infections does not require damp surfaces as it can grow on both dry and wet leaves.

Powdery mildew is a powdery white to light gray colored fungus that will grow on succulent stems leaves buds and flowers. Apply a fungicide to protect plants. 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. Join virginia tech plant pathologist mary ann hansen as she discusses common plant diseases in virginia.

Prune out dead limbs that might be harboring fungi but do not trim infected. In this video she talks about powdery mildew on do. They are generally host specific. However once infected with powdery mildew trees can develop an unattractive appearance.

Dogwood is a popular landscape tree throughout kentucky. We are recommending that you spray at least 6 hours prior to a rain. Disease resistant cultivars are available and reduce the chances of problems such as powdery mildew and spot anthracnose. The disease is most prevalent during periods of high humidity and in landscapes with reduced air circulation.

Young plants and new growth are usually more severely damaged than older plants leaves or branches. This disease is caused by the fungus elsinoe corni one of the most common leaf diseases of flowering dogwoods. Powdery mildew is one of the most common diseases and infects all types of plants and trees outdoors and indoors. The canker slowly girdles the tree.

In the southeast powdery mildew on dogwood is known to be caused by two different fungi microsphaera and phyllactinia.