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

May 2014 news archives

  • Glassy-winged sharpshooter eggs found in Napa County
    Napa Valley Register May 27, 2014

    Glassy-winged sharpshooter eggs found in Napa County Napa Valley Register Staff from the Napa County Agricultural Commissioners Office found glassy-winged sharpshooter eggs last week while inspecting a shipment of plants to a local plant retailer. The sharpshooter has the potential to be a devastat ...