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Powdery Mildew Fungicide Resistance Survey

The following message is from Brooke Warres, a graduate student in the University of Georgia Plant Pathology Department.

“Now that we are at harvest and spray programs may be halted or reduced, powdery mildew will likely be popping up.  As mentioned previously, we are conducting a survey of fungicide resistance in powdery mildew. We are trying to sample as many vineyards as possible to determine resistance profiles for DMI (e.g. Rally) and QoI (e.g. Abound) fungicides; the derived resistance information will be relayed to each participant — allowing more efficacious fungicide selection for next year. If you observe powdery mildew, even if it’s a small amount, please contact your local county agent and/or email me at or call me at 678-642-2183. Either your county agent or I will come by and quickly swab the leaves that have powdery mildew on them. Thank you so much for your help!”




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About Phil Brannen

Phil Brannen is a Professor in the Plant Pathology Department at the University of Georgia. He attended the University of Georgia for his undergraduate degree in Plant Protection and Pest Management, where he also received an M.S. in Plant Pathology, followed by a Ph.D. in Plant Pathology from Auburn University. He has extensive experience with disease management programs in numerous cropping systems. He serves as the extension fruit pathologist for Georgia – conducting research and technology transfer for multiple fruit commodities. His efforts are directed towards developing IPM practices to solve disease issues and technology transfer of disease-management methods to commercial fruit producers. He also teaches the graduate level Field Pathology Course, the History of Plant Diseases and their Impact on Human Societies Course, team-teaches the IPM Course, coordinates the Viticulture and Enology in the Mediterranean Region Course (Cortona, Italy), and guest lectures in numerous other courses throughout the year.