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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

The relationship between Diaporthe perjuncta and Phomopsis viticola on grapevines

  • Author(s): Phillips, Alan;
  • Abstract: A species of Diaporthe occurring on grapevines in Portugal was identified as D. perjuncta. The fungus was self-fertile and the teleomorph was produced on sterilized grapevine twigs inoculated with single ascospore cultures. Asci and ascospores in culture were indistinguishable from those found on the host in the field. Apart from its association with Vitis, the anamorph bears little resemblance to Phomopsis viticola but appears to be more closely related to Phomopsis oblonga. The taxonomy of the anamorph is discussed.
  • Publication Date: Nov 1999
  • Journal: Mycologia

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