Pierce's Disease
Research Updates

piercesdisease.cdfa.ca.gov

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

Review of the neotropical leafhopper genus Chlorogonalia (Hemiptera : Cicadellidae : Cicadellinae), with notes on the genus Caldwelliola


  • Author(s): McKamey, Stuart;
  • Abstract: Chlorogonalia Young, 1977, and Caldwelliola Young, 1977, are superficially very similar genera that may not be closely related genera within the tribe Cicadellini (Hemiptera: Cicadellidae: Cicadellinae). Two species, Chlorogonalia ultima Young and Caldwelliola reservata (Fowler), are particularly similar phenotypically and are sympatric in Ecuador (new country record for C reservata). New diagnostic features are given for both genera; two of these features can be assessed in undissected specimens. Caldivelliola tharma (Young) is proposed as a new combination (from Chlorogonalia). Species of both genera are possible vectors of the bacterium Xylella jastidiosa in coffee; Caldwelliola caucana has been directly implicated as a vector of the crespera disease in Colombia. An illustrated key is included to distinguish the four known species of Chlorogonalia.
  • Publication Date: Jul 2006
  • Journal: Proceedings Of The Entomological Society Of Washington