EPIDEMIOLOGICAL ANALYSES OF GLASSY-WINGED SHARPSHOOTER AND PIERCES DISEASE DATA

• Author(s): Perring, Thomas; Farrar, Charles; Hashim, Jennifer; Hill, Barry; Kelly, Maggi; Krell, Rayda; Park, Yong-Lak; Pryor, Murry;
• Abstract: The progression of PD in vineyards and across a landscape is dependent upon factors related specifically to four components: GWSS, Xylella fastidiosa causing PD, grapes, and the environment. When conditions in all four of these areas are optimal, disease spreads with devastating consequence as in Temecula in the late 1990s. Conversely, sub-optimization within any of the four categories can slow or stop disease progress. The aggressive insecticide campaigns against GWSS are prime examples of creating this sub-optimal condition for disease spread. This single approach has been effective, but it may not be sustainable in reduced budget times. The science of epidemiology seeks to determine how the 4 components listed above interact, with the goal of creating long-term, sub-optimal conditions for disease spread. Achieving this goal will enable California producers to continue growing grapes in areas known to have PD and GWSS.
• Publication Date: Dec 2004
• Journal: 2004 Pierce's Disease Research Symposium