Dogwood Anthracnose Fact Sheet

Dogwood anthracnose is most severe only in areas of the state that are higher than 2000 feet.

Dogwood anthracnose fact sheet.

It is also an important disease of pacific dogwood cornus nuttallii in the west. A few cases have been reported at lower elevations where dogwoods are grown in very cool moist shady locations. Remove all pruned wood to reduce any. The native flowering dogwood cornus florida is a popular ornamental tree that thrives well in the warmer areas of new hampshire.

Discula dogwood anthracnose fact sheet january 1 2003. The fungus discula destructiva causes dogwood anthracnose leaf blight and canker. University of kentucky college of agriculture food environment extension plant pathology ppfs or w 06 college of agriculture food and environment. These diseases can be found throughout the eastern united states.

Anthracnose than late blooming cultivars. Dogwood anthracnose is a disease caused by the fungus discula destructiva. The southern part of the state is included in the northern transitional zone where patches of. It is a serious disease capable of killing large numbers of trees and most cornus species can become infected.

Dogwood powdery mildew has also become a recent major threat to dogwoods. Kousa is also susceptible to infection but is highly resistant to the disease and typically suffers only minor leaf spotting. Dogwood anthracnose discula destructiva is often described as the most serious disease that affects dogwood species specifically flowering cornus florida and mountain c. Sycamore ash maple oak and privet are especially susceptible.

Anthracnose diseases are caused by fungi that are capable of infecting stems branches leaves and fruits of a wide variety of deciduous trees and shrubs. If daily temperatures average above 60 f at bud break anthracnose is usually not severe. Dogwood anthracnose dogwood anthracnose is considered the most serious disease of flowering dogwood cornus florida in connecticut and the eastern seaboard. Although wet weather tends to favor this disease temperature is the most important factor.

Other common landscape dogwoods such as. Dogwood anthracnose infects flowering cornus florida and pacific dogwoods c. Spot anthracnose appears as reddish purple spots on bracts of flowering dogwood. The disease was first noticed on the flowering dogwoods in new york and connecticut in 1978 1 and on mountain dogwoods.

Anthracnose of trees and shrubs. The mildew which often causes a. Cool weather 50 to 55 f average daily temperature during leaf bud break and emergence greatly favors disease development whether it is wet or dry. Plant pathology fact sheet flowering dogwood diseases figures 1 2.

Nuttallii dogwood species in the united states.