Powdery Mildew On Dogwood - Dogwood Powdery Mildew

ANR-1051 Revised November 2000. Austin Hagan, Extension Plant Pathologist, Professor, and Jacqueline Mullen, Extension Plant Pathologist and Diagnostician, both in Entomology and Plant Pathology at Auburn University
owdery mildew, which is caused by the fungus Microsphaeria penicillata, was seen on a single flowering dogwood in 1993. By the spring of 1994, this disease was commonly found on flowering dogwood in landscapes statewide. Since then, powdery mildew has remained the most common foliar disease of flowering dogwood in Alabama. Normally, damage to trees is cosmetic but seedling dogwoods may be badly disfigured or killed by powdery mildew. On susceptible dogwoods, the disease is equally damaging on trees in full sun as on those growing in heavy shade.

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