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Napa County warns residents after glassy-winged sharpshooter detections; signs up for Alert Napa County and announces National Night Out
Summary
The county warned of glassy-winged sharpshooter detections tied to grapevines sold at Costco, saying 143 of 220 vines delivered to the Napa store were found and destroyed; officials urged residents to report suspect plants. The county also urged residents to sign up for Alert Napa County and announced National Night Out on Aug. 4 at Napa Valley College.
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Napa County officials are urging residents to report suspect grapevine plants after detections of the glassy-winged sharpshooter, an insect that feeds on grapevines and spreads the bacterium that causes Pierce's disease.
Linda Weinrich said detections tied to grapevines purchased from Costco stores (including locations in Napa, Marin, Sonoma and Yolo counties) were first discovered April 21. The county reported that, as of late June, 143 of 220 grapevines delivered to the Napa Costco had been located and destroyed. The Agricultural Commissioner's Office is conducting site inspections, placing additional detection traps, and taking calls from the public.
Tracy Cleveland, Napa County agriculture commissioner, described the pest and the threat it poses to vineyards and grape production and urged community support for detection and removal efforts. The county asked anyone who purchased a grapevine from Costco to contact the Agricultural Commissioner's Office, even if unsure, at (707) 253-4357.
Separately, Weinrich encouraged residents to sign up for Alert Napa County as the county enters peak wildfire season; sign-ups are available through the county website or by texting a ZIP code to 888777 (the newscast provided that number). Finally, the county announced National Night Out on Tuesday, Aug. 4 at Napa Valley College from 4 to 7 p.m., inviting community members to meet deputies from the Napa County Sheriff's Office.
The Agricultural Commissioner's Office did not provide a comprehensive estimate of statewide spread beyond the counties named, nor did the newscast provide a detailed remediation timeline; the newscast advised residents to report suspect plants and to follow county updates.

