The Impact of Grapevine Red Blotch Virus
Grapevine red blotch-associated virus found in grapevine nursery stock and established vineyards
Mar 2013 Issue of Wine Business Monthly
Over the past several years vines have turned red in the fall for no obvious reason. This phenomenon has been observed in single vines dotted throughout vineyards in apparently random fashion, in small contiguous groups of vines and in whole vineyard blocks where vines have developed symptoms resembling those associated with grapevine leafroll disease in mid- to late-October through November. Detailed studies of affected vines have failed to provide satisfactory answers as to the cause of the fo...
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