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Pierce's Disease
Research Updates

piercesdisease.cdfa.ca.gov

What is Pierce's Disease?

Pierce's Disease is a bacterial infection, which is spread by bugs that feed on grapevines, particularly the "glassy winged sharpshooter." Grapevines that become infected with PD can quickly become sick and die.

glassy-winged sharpshooter

GWSS Spread Incident Information


Please visit the incident website for information about potentially GWSS-infested plants recently sold at select California Costco stores, including outreach materials and County Agricultural Commissioner contact information.

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