powdery mildew

views updated

powdery mildew Either a fungus of the order Erysiphales or a plant disease caused by such a fungus. The leaves, fruit, etc., of an infected plant bear characteristic powdery white patches of conidium-bearing mycelium; tiny black perithecia may also be visible. Many types of plant may be affected, usually each by its own particular species or strain of fungus.

More From encyclopedia.com