Invasive Insect Alert: Costco Plants Affected, Northern California Counties Respond (2026)

The recent discovery of an invasive insect, the glassy-winged sharpshooter, on grapevines and citrus plants sold at Costco in Northern California has sparked concern among agriculture officials and the public alike. This non-native pest, which can carry Pierce's Disease, poses a significant threat to California's agriculture and home gardens. The insect was detected in multiple counties, including Sacramento, Solano, Stanislaus, Yolo, Alameda, Marin, Placer, Napa, Yuba, and San Mateo, with some infested plants sold at Costco locations in Marysville and Sacramento. The infestation was traced back to multiple shipments of grapevines from Burchell Nursery, Inc., in Fresno County, received between April 21 and May 21. This incident highlights the ongoing challenge of managing invasive species and the importance of vigilance in preventing their establishment and spread. The glassy-winged sharpshooter, native to the southeastern United States and Mexico, was first detected in California in the 1990s and has since become established in portions of central and southern California. The insect can damage a variety of plants, including grapevines, almonds, citrus, and ornamental plants, making its presence particularly concerning for local agriculture and home gardens. The Sacramento County Agricultural Commissioner, Chrisandra Flores, emphasizes the need for community collaboration to limit the risk to local vineyards and agriculture. The situation underscores the critical importance of early detection and rapid response to invasive species, as well as the role of retailers like Costco in ensuring the safety of the food supply chain. The affected grapevines and citrus plants have been destroyed, and officials are urging anyone who recently purchased these plants to take immediate action to prevent further spread. This includes placing two garbage bags over the plants and securing them tightly, or scheduling an inspection with the agriculture department for citrus plants. It is crucial to avoid returning, transporting, or relocating the plants, as well as placing them in the trash or compost bin, as these actions could exacerbate the infestation. The Yolo County Agricultural Commissioner, Humberto Izquierdo, emphasizes the urgency of the situation, stating that preventing further spread is critical. The collaboration between Costco, state and regional partners, and local agricultural officials is vital to identifying affected plants and protecting local agriculture and home gardens. This incident serves as a reminder of the ongoing battle against invasive species and the need for continued vigilance and cooperation to safeguard California's natural resources and agricultural economy.

Invasive Insect Alert: Costco Plants Affected, Northern California Counties Respond (2026)
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