Valley wine grape growers are among those on the lookout for Pierce’s Disease and other vine viruses. Sabrina Hill reports.
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John Holmquist is the Manager Grower Relations for Constellation Wine out of Madera. He says there are a number of vine-health issues for wine grape growers to watch for. He says weather also caused some problems this last growing season. He says there’s just too many issues to know exactly what the cause was, but red blotch and other viruses remain a concern.