Costco has issued a warning to customers who purchased desert willow plants between June 24 and July 3, 2026, due to concerns about an infestation of the glassy-winged sharpshooter.
This invasive insect can spread Pierce’s disease, a bacterial infection that threatens grapevines, citrus trees, and other crops. The disease has historically cost California’s grape and wine industry millions annually.
According to a report by Fox Business, the sharpshooter is particularly hard to contain as it can fly significant distances, spreading the disease between host plants. Customers are advised to keep the plants in their original containers, isolate them from other plants, and contact their local county agricultural commissioner’s office for inspection.
The Animal and Plant Health Inspection Service emphasizes the importance of early detection and rapid response to prevent further spread. Customers are instructed not to plant, transport, or dispose of the desert willows and to seal them in double trash bags if possible. Costco will provide full refunds to affected customers who present the notification letter at their local warehouse.
The California Department of Food and Agriculture is actively working to track and manage the infestation, urging customers to cooperate with local agricultural officials. The department highlights the significant economic threat posed by Pierce’s disease, estimating potential annual losses of $166 million if the pest becomes established statewide.
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