In this photo taken Thursday, Dec. 13, 2012 vineyard manager Chris Pedemonte walks through a vineyard of Cabernet Sauvignon that was replanted this past spring at Round Pond Estate in Rutherford, ... more 
In this photo taken Thursday, Dec. 13, 2012 vineyard manager Chris Pedemonte walks through a vineyard of Cabernet Sauvignon that was replanted this past spring at Round Pond Estate in Rutherford, Calif. Napa Valley, one of California's premier wine growing regions, has an uncommon problem these days: Not enough new grape root stock to go around. Commercial nurseries were caught short by a trifecta of developments: aging vines planted after a deadly phylloxera outbreak of the 80s, the demand created by an improving economy and move toward grape plantings that allow some mechanization. (AP Photo/Eric Risberg) less 
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Associated Press | Photo By Eric Risberg
Sun, Dec 16, 2012 3:57 PM EST