Powdery Mildew: Treatment and Prevention | Epic Gardening
Mar 01, 2019·How To Identify Powdery Mildew The most obvious sign of this disease is the distinct powdery, white dust that covers a plant’s leaves. These start out small, but grow in size as the disease progresses. The difference between downy mildew and powdery mildew. source. It can be easy to confuse powdery mildew with a similar disease, downy mildew.