The U.S. Department of Agriculture will contribute $1 million to help California battle the spread of European grapevine moth.

The pest was discovered last fall in the Napa County wine country. It has since been deteted in nearby Sonoma, Solano and Mendocino counties, according to a news release.

The California Department of Food and Agriculture has quarantined the area.

USDA's Animal and Plant Health Inspection Service, the state and counties are working together to survey and, if necessary, control the pest.

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