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

EVALUATION OF BLUE-GREEN SHARPSHOOTER FLIGHT HEIGHT


  • Author(s): Weber, Ed;
  • Abstract: Flight heights of blue-green sharpshooters (BGSS) were monitored in Napa Valley vineyards from March through September for three seasons (2004-2006) using pole towers to position yellow sticky panel traps at heights up to 24 feet. Towers were located adjacent to vineyards at the edge of a riparian zone. Eleven towers were monitored in 2004 and 2006; twelve were monitored in 2005. Trap catches in 2004 were considerably greater than in 2005 and 2006. For the March-May period, 76-99% of the catches were made at 15 feet or lower. These data support the possible use of screen or natural barriers to reduce the number of BGSS entering vineyards in the spring.
  • Publication Date: Nov 2006
  • Journal: 2006 Pierce's Disease Research Symposium