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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

THE ROLE OF OLFACTORY CUES IN HOST-PLANT SELECTION BY THE GLASSY-WINGED SHARPSHOOTER

  • Author(s): Groves, Russell; Johnson, Marshall; Nadel, Hannah; Seligmann, Ron;
  • Abstract: The glassy-winged sharpshooter (GWSS) is a highly polyphagous and mobile vector of Pierces disease of grapes. Trap captures in a multi-crop agricultural landscape under constant deficit irrigation suggest that adult GWSS movement is tied to irrigation schedules. To understand the observed patterns of movement, we explored the orientation and feeding responses of adult GWSS toward citrus and avocado plants undergoing various levels of water-deficit and nutritional treatments. Choice and no-choice cage studies indicate that GWSS distinguishes water-stress in hosts and prefers to settle on and feed more on well-hydrated plants. GWSS showed no significant response to a choice of citrus fertilized with ammonium or nitrate forms of nitrogen.
  • Publication Date: Nov 2006
  • Journal: 2006 Pierce's Disease Research Symposium

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