Viability of Heterodera glycines exposed to fungal filtrates

S. Y. Chen, D. W. Dickson, D. J. Mitchell

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


Filtrates from nematode-parasitic fungi have been reported to be toxic to plant-parasitic nematodes. Our objective was to determine the effects of fungal filtrates on second-stage juveniles and eggs of Heterodera glycines. Eleven fungal species that were isolated from cysts extracted from a soybean field in Florida were tested on J2, and five species were tested on eggs in vitro. Each fungal species was grown in Czapek-Dox broth and malt extract broth. No toxic activity was observed for fungi grown in Czapek-Dox broth. Filtrates from Paecilomyces lilacinus, Stagonospora heteroderae, Neocosmospora vasinfecta, and Fusarium solani grown in malt extract broth were toxic to J2, whereas filtrates from Exophiala pisciphila, Fusarium oxysporum, Gliocladium catenulatum, Pyrenochaeta terrestris, Verticillium chlamydosporium, and sterile fungi 1 and 2 were not toxic to J2. Filtrates of P. lilacinus, S. heteroderae, and N. vasinfecta grown in malt extract broth reduced egg viability, whereas F. oxysporum and P. lerrestris filtrates had no effect on egg viability.

Original languageEnglish (US)
Pages (from-to)190-197
Number of pages8
JournalJournal of Nematology
Issue number2
StatePublished - Jun 1 2000


  • Biological control
  • Egg
  • Exophiala pisciphila
  • Fungus
  • Fusarium oxysporum
  • Fusarium solani
  • Gliocladium catenulatum
  • Hatching
  • Heterodera glycines
  • Juvenile
  • Nematode
  • Neocosmospora vasinfecta
  • Paecilomyces lilacinus
  • Pyrenochaeta terrestris
  • Soybean cyst nematode


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