A harmful pest has been detected on grapevines sold at a Napa Costco, raising concerns for California's wine industry. - The pest was found during inspections of grapevines sold at the Napa Costco.
- Butte County Agricultural Commissioner Katharine Quist confirmed the Chico Costco also sold affected plants. - Officials urge customers to report purchases to prevent pest spread.
- The discovery threatens vineyards and could cause economic losses for wine growers. The investigation is ongoing to trace the source and assess the full impact.