A virus that attacks grapevines is leading many Napa County growers to consider replanting and replacing their vineyards and vines by 2017. According to a study conducted by the Napa Valley Grapegrowers, 86% of farmers who responded to the survey said they have plans to redevelop portions of their acreage by the end of next year.
You can read more details about this survey and its implications in this Wines & Vines article.
The Grape Geeks 