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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

Biocontrol potential of the fungi Hirsutella rhossiliensis and H. minnesotensis against Heterodera glycines

  • Author(s): Chen, S.;
  • Abstract: Hirsutella rhossiliensis and Hirsutella minnesotensis are spore-producing hyphomycetes that parasitize vermiform nematodes. The fungi were frequently encountered on the second-stage juveniles of the soybean cyst nematode, Heterodera glycines, in Minnesota, and they also have been observed on the nematode from Michigan and South Dakota. The effectiveness of biological control of H. glycines using the two fungi was evaluated in laboratory, greenhouse, and fields. Variation exists between the two species and among isolates. Hirsutella rhossiliensis is more effective than H. minnesotensis in lowering the H. glycines population density in greenhouse experiments. Field experiments during 1998-2001 showed that both fungi reduced SCN population density and increased soybean yield sometimes, but not always.
  • Publication Date: Jun 2003
  • Journal: Phytopathology

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