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Pierce's Disease
Research Updates

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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

LABORATORY AND FIELD EVALUATIONS OF IMIDACLOPRID, THIAMETHOXAM, AND ACETAMIPRID AGAINST THE GLASSY-WINGED SHARPSHOOTER ON GRAPEVINES

  • Author(s): Byrne, Frank; Castle, Steven; Toscano, Nick; Bi, Jian; Gispert, Carmen; Learned, Mac; Prabhaker, Nilima;
  • Abstract: In a comparison of Admire application rates in Temecula vineyards, a 16 oz. per acre treatment proved very effective at attaining xylem sap imidacloprid levels that were necessary to protect vines from sharpshooter feeding. An 8 oz. per acre rate proved to be too inconsistent in terms of the level of protection afforded, while a 32 oz. rate produced unnecessarily high levels of imidacloprid that did not extend the period of protection much beyond that afforded by the 16 oz. rate. In Coachella Valley vineyards, the 16 oz. rate produced levels of imidacloprid within the xylem sap that were extremely short-lived, raising concerns about the stability of this material within this region.
  • Publication Date: Aug 2003
  • Journal: 2003 Pierce's Disease Research Symposium

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