1. Department of Viticulture and EnologyUniversity of California DavisDavis CA95616 USA
2. Department of Botany and Plant SciencesUniversity of California RiversideRiverside CA92521 USA
3. Department of Plant PathologyUniversity of California DavisDavis CA95616 USA
4. University of California Cooperative Extension, Sonoma CountySanta Rosa CA95403 USA
5. United States Department of Agriculture ‐ Agricultural Research ServiceCrops Pathology and Genetics Research UnitDavis CA95616 USA