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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

PLANT-GLASSY-WINGED SHARPSHOOTER INTERACTIONS: BIOCHEMICAL MECHANISMS INVOLVED IN HOST PLANT SELECTION BETWEEN YOUNG AND OLD ORANGE TREES

  • Author(s): Bi, Jian; Byrne, Frank; Castle, Steven; Toscano, Nick;
  • Abstract: Glassy-winged sharpshooter (GWSS) population dynamics on young (5 years old) and old (20 years old) orange trees and related biochemical mechanisms were investigated in a field experiment. The numbers of GWSS were much higher on the young trees compared to those on the old trees. Levels of xylem asparagine, glutamine, threonine, valine, phenylalanine, tyrosine, isoleucine, leucine, lysine, methionine and histidine were also higher in the young trees in comparison with those in the old trees. These results suggest that particular amino acids play critical roles in GWSS host selection.
  • Publication Date: Aug 2003
  • Journal: 2003 Pierce's Disease Research Symposium

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