Check out the Pierce's Disease Control Program Internet Map Server
An interactive mapping program on the California Department of Food and Agriculture

Napa County Farm Bureau

California Department of Food and Agriculture

U.C. Davis Media Kit

U.C. Berkeley

U.C. Riverside

Napa Valley Grape Growers

Napa Valley Vintners

Department of Pesticide Regulation

List of Host Plants (Scroll to Section 3658)