Powdery Mildew

• Powdery mildew will appear in early to mid July. The disease will appear on the leaves as a white, powdery mildew. Powdery mildew infection will reduce the vine's hardiness through winter, and will stunt the vine's growth and reduce the plant's yield. French hybrids and European varieties are most susceptible to powdery mildew. Fungicide sprays are the most effective at controlling the disease.