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New PD-Resistant Wine Grape Varieties Named and Released

December 03, 2019

The University of California, Davis Office of Research's Innovation Access unit informed the California Department of Food and Agricultureof the official release of five new Pierce's Disease (PD) resistant grapevine varieties developed in the breeding program of UCD viticulture professor and grape breeder Dr. Andy Walker. The five releases include three red wine grape selections and two white wine grape selections that have repeatedly shown strong resistance to PD in greenhouse and field trials, and have shown high fruit quality and high wine quality across several vintages and in wine tastings. These five selections are the results of a multi-year research and breeding project largely funded through the CDFA Pierce's Disease and Glassy-Winged Sharpshooter (GWSS) Board