Winery waste can be a source of vine mealybugs, but pomace management practices can greatly reduce the future contamination of vineyards.
Vine mealybugs (Planococcus ficus) were found in southern San Joaquin Valley vineyards in 1998, the Central Coast in 2000, and in the Sacramento Valley, Sierra Foothills and the North Coast in 2002. By the end of 2004, infestations were known to occur in 16 counties, and an additional three counties were suspected of having infested vineyards.
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