This presentation will help consultants, growers, and other practitioners in arid tomato production areas of the United States to recognize and manage powdery mildew of tomato caused by Leveillula. The presentation addresses disease symptoms, identification, life cycle, and host range of the fungus. The impacts of mildew on fruit yield and quality are presented, and management strategies are discussed. Although cultural methods can impact the disease and will be mentioned, emphasis will be on chemical tools for disease management. Fungicide resistance management strategies will also be covered. The information presented should allow the practitioner to improve management of this disease.
