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Foundation Plant Services Finds 21 Red Blotch-Positive Vines at Russell Ranch

December 07, 2018

During annual virus testing at its Russell Ranch Foundation Vineyard, UC Davis Foundation Plant Services found 21 vines tested positive for red blotch virus. ... Foundation vineyard blocks serve as the source repository for certified, virus-free and true-to-variety clean grapevine plant material distributed to nurseries under the California Department of Agriculture's Grapevine Registration and Certification Program