Dogwood Tree Disease Powdery Mildew

Young plants and new growth are usually more severely damaged than older plants leaves or branches.

Dogwood tree disease powdery mildew. The tree may produce less fruits when attacked by the fungus. Almost any tree species can be affected by powdery mildew but the most common are maple basswood dogwood lilac magnolia crabapple catalpa and oaks. Mulch the tree. Powdery mildew is a disease which is common on many ornamental trees and shrubs including dogwoods.

Powdery mildew produces thousands of spores per square inch on a dogwood leaf. During this time the tree flowers and fruits profusely but eventually dies. Many common edible and ornamental garden plants are affected including apples blackcurrants gooseberries grapes crucifers courgettes marrows cucumbers peas grasses the powdery mildew fungi are major pathogens of cereal crops acanthus delphiniums phlox many ornamentals in the daisy family lonicera honeysuckle. If disease is severe enough to warrant the use of fungicides be sure that the dogwood is a valuable specimen and the spray equipment can provide good coverage.

Powdery mildew is a powdery white to light gray colored fungus that will grow on succulent stems leaves buds and flowers. In the southeast powdery mildew on dogwood is known to be caused by two different fungi microsphaera and phyllactinia. Spores break off of small stalks and are wind blown to other trees. It usually kills the seedlings before they reach the woody stage.

Fortunately although the disease is disfiguring it rarely kills a tree. Powdery mildew a common fungal disease may destroy the beauty appearance of the dogwood tree. Sericea is very susceptible to powdery mildew. How to get rid of powdery mildew on dogwood.

New growth must be protected with sprays every 2 weeks frequency can vary with the fungicide selected and rate. The seedlings of this tree may suffer from root infection caused by the pythium fungus species. Powdery mildew is a fungal disease of the foliage stems and occasionally flowers and fruit where a superficial fungal growth covers the surface of the plant. Powdery mildew attacks all kinds of landscape plants including trees.

We observed up to a 50 percent increase in caliper and height where fungicides were. Apply a fungicide to protect plants. 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.

Prune out dead limbs. For fungicides to be effective they must be applied as soon as symptoms are noticed. Remove the infected tree and do not replace it with another woody ornamental until the soil has been fumigated and aerated.