I have been told it is powdery ... mildew on ornamentals and general care and pest management for crape myrtles at www.ipm.ucdavis.edu. Molly K. Weden is a Contra Costa Master Gardener. The UC ...

UC Davis researchers have uncovered important genetic clues about the pathogen that causes grape powdery mildew, among the most destructive vineyard pests throughout California and the world.

UC Berkeley researchers are currently working on improving resistance of crops toward powdery mildew, an effort that could potentially save up to billions of dollars in crop damage in California.