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Tiny Bug Sparks Massive Costco Plant Recall in CA
15 Jul
Summary
- Tiny invasive insect threatens California's multibillion-dollar wine industry.
- GWSS spreads Pierce's disease, a fatal infection in grapevines.
- Thousands of grapevines and desert willows recalled from California Costcos.
California agricultural officials are engaged in a widespread effort to locate and remove thousands of plants sold at Costco. The concern stems from the presence of the glassy-winged sharpshooter (GWSS), an invasive insect capable of spreading Xylella fastidiosa, a bacterium responsible for Pierce's disease. This disease is potentially fatal to grapevines, threatening California's significant wine industry.
The GWSS, a leafhopper native to the southeastern U.S. and northeastern Mexico, was established in California during the 1990s. Its primary danger lies in its role as a vector for Pierce's disease, which blocks a grapevine's water supply, leading to discolored leaves, shriveled grapes, and eventual death. There is no known treatment for the disease, requiring infected vines to be removed and destroyed.
The recall affects grapevines sold between April 21 and May 21, 2026, and desert willow plants sold between June 24 and July 3, 2026. These were distributed across multiple California counties, including Santa Clara, Napa, and Sonoma. Over 1,300 grapevine plants were sold in Santa Clara County alone, with many still unaccounted for as of July 15, 2026.
Consumers who purchased the affected plants are urged to isolate them and contact their local county agricultural commissioner's office immediately. This rapid response is critical to prevent the further establishment of the pest and protect California's vital grape and wine production, which contributes billions of dollars to the state's economy.
