A glassy-winged sharpshooter rests on a leaf on Wednesday, July 30, 2025. Several California counties, including Mendocino, are on high alert after the invasive pest was found on nursery plants at local Costco stores in spring 2026. (U.S. Department of Agriculture via Bay City News)

SACRAMENTO, CA., 8/15/2026 — California’s winegrape industry has committed $820,000 towards the eradication of a grapevine pest that has spread to 40 counties in the state, but the figure represents a small fraction of what might be needed to get the job done.

The glassy-winged sharpshooter (GWSS) is a pest that looks like a cricket and spreads the fatal grapevine ailment known as Pierce’s disease, a bacterial infection that blocks the water-conducting systems in plants, causing them to dry out. The disease is incurable.

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