Pest with ‘no cure’ sparks panic at Napa vineyards as urgent alert issued
An urgent alert has been issued in Napa County due to the discovery of the glassy-winged sharpshooter, an invasive insect linked to a devastating vineyard disease. The pest, which spreads Pierce’s disease, was found in grapevines sold at Costco, prompting officials to destroy part of the affected shipment. Authorities are urging community members to report any potentially infected plants to mitigate risks to local agriculture.
- ▪The glassy-winged sharpshooter poses a major threat to California's agricultural industry by spreading Pierce's disease, which has no cure.
- ▪220 grapevines shipped to Costco locations in Napa and surrounding counties were found to be affected by the pest.
- ▪63 of the 220 grapevines delivered to Napa Costco have been destroyed after GWSS was detected.
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Metro Pest with ‘no cure’ sparks panic at Napa vineyards as urgent alert issued By Daniel Farr Published May 26, 2026, 7:13 p.m. ET See more of our coverage in your search results. Add The California Post on Google An urgent warning issued Tuesday by Napa County’s agricultural commissioner has sparked concern across California after an invasive insect linked to devastating vineyard disease was discovered in grapevines sold at Costco Wholesale and distributed across multiple counties. Officials confirmed that shipments of grapevines originating from Burchell Nursery in Fresno County were delivered to Costco locations serving Napa, Sonoma, Marin, Solan and Yolo counties.
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