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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

Two new species of Graphocephala Van Duzee from Costa Rica (Cicadellidae : Cicadellinae)

  • Author(s): Godoy, Carolina; Villalobos, W.;
  • Abstract: The genus Grahocephala, which was described by Van Duzee ( 1916), is a large complex group distributed from southern Canada to Colombia, Venezuela, and French Guiana. Young ( 1977) revised the genus and described twelve new species. Later, Nielson and Godoy ( 1995) added five more species. In this paper two new species are described from Costa Rica: G. crusa and G. riverae. The first species showed positive DAS-ELISA results for the bacterium, Xylella fastidiosa.
  • Publication Date: Jan 2006
  • Journal: Zootaxa

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