Powdery Mildew: Treatment and Prevention | Epic Gardening
Mar 01, 2019·How To Prevent and Treat Powdery Mildew Complete prevention of powdery mildew outbreaks can be difficult. The spores of the fungus are carried through the air on gusts of wind. The spores then fall on plant surfaces and begin to reproduce if the conditions are right. In moist conditions, powdery mildew may not be a problem.