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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

Proximity to citrus influences Pierces disease in Temecula Valley vineyards.

  • Author(s): Perring, Thomas;
  • Abstract: Pierce's disease has caused extensive losses to grapes in the Temecula Valley. The primary vector of Pierce's disease in the region is the glassy-winged sharpshooter (GWSS), which has been found in large numbers in citrus trees. We examined the role of citrus in the Temecula Valley Pierce's disease epidemic and found that citrus groves have influenced the incidence and severity of Pierce's disease in grapes. Becaus GWSS inhabit citrus in large numbers, California grape growers should take additional care with vineyards located near citrus groves.
  • Publication Date: Jan 2001
  • Journal: California Agriculture

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