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Glass-Winged Sharpshooters Found on Costco Grapevines, Hundreds Destroyed

5/27/2026

Summary

Costco Destroys Contaminated Vines

Northern California officials warned that glassy-winged sharpshooters were found on grapevines and citrus plants sold at Costco.
The insects were detected on Burchell Nursery shipments from Fresno County that arrived at Costco between April 21 and May 21, 2026.
Chrisandra Flores said 160 grapevines delivered to Sacramento Costco were destroyed.
Tracy Cleveland said 63 of 220 Napa Costco grapevines were destroyed, one egg mass was found, and about 157 vines remain unaccounted for.

Summary

Mosley Warns

Caleb Mosley called the infested vine shipment a major breach and warned it could worsen economic headwinds for wineries.
A 2008 University of California study found Pierce’s disease caused nearly $30 million in losses and destroyed over 1,000 acres of grapevines in Northern California from 1994 to 2000.
County officials warned that an established infestation could be costly to eradicate and could devastate the local vineyard, winery and tourism industries.

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Costco Destroys Contaminated Vines

Northern California officials warned that glassy-winged sharpshooters were found on grapevines and citrus plants sold at Costco.
The insects were detected on Burchell Nursery shipments from Fresno County that arrived at Costco between April 21 and May 21, 2026.
Chrisandra Flores said 160 grapevines delivered to Sacramento Costco were destroyed.
Tracy Cleveland said 63 of 220 Napa Costco grapevines were destroyed, one egg mass was found, and about 157 vines remain unaccounted for.

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