Fungal penetration of the cyst wall of Heterodera glycines

Senyu Chen, D. W. Dickson

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Twelve fungal species were examined with the aid of light, scanning electron, and transmission electron microscopy to determin their capability to penetrate the cyst wall of Heterodera glycines. Arthrobotrys dectyloides, Dictyochaeta heteroderae, Exophoiala pisciphila, Fuscarium oxipoeum, Neocosmospora vasinfecta, Paecilomyces lilacinus, Pyrenochaeta terrestris, Stagenospora heterodrace, Varticillium chlamydosporium, and a sterile fungus (black, yeastlike fungus) were observed to penetrate the cyst wall of Heterodera glycines. The light microscopy praccdure reported herein was useful for determining the direction of fungal penetration of the cyst wall. Also, the procedure allowed for the examination of many specimens. Nine of these fungi penetrated the cyst wall from inside the cyst. At least three species, Exophiala pisciphila, Fusarium oxysporum, and Pyrenochaeta terrestris, also penetrated the was limited to the outer layers of the cyst wall. No fungal penetration was observed on cysts exposed to Gliocladium catenulatum or Hirsutella rhossiliensis for up to 1 month.

Original languageEnglish (US)
Pages (from-to)319-327
Number of pages9
Issue number3
StatePublished - Mar 1996


  • Biological control
  • Nematode fungal antagonist
  • Soybean cyst nematode


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