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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

OPTIMIZATION OF ADMIRE APPLICATIONS IN NORTH COAST VINEYARDS

  • Author(s): Byrne, Frank; Toscano, Nick; Weber, Ed;
  • Abstract: Four treatment regimes for Admire, a soil-applied imidacloprid insecticide, were evaluated in a North Coast Chardonnay vineyard in a cool site with a loam soil (15% clay content) and limited irrigation. None of the treatments resulted in consistent uptake or sustained concentrations of imidacloprid in xylem fluid at levels desired for control of blue-green sharpshooters or other insects. Our results suggest that limiting irrigation in order to manage vine growth and berry size for premium wine production may prevent the effective use of Admire in some cooler growing regions.
  • Publication Date: Dec 2004
  • Journal: 2004 Pierce's Disease Research Symposium

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