FUNGI ASSOCIATED WITH FEMALES AND CYSTS OF HETERODERA-GLYCINES IN A FLORIDA SOYBEAN FIELD

Fungal colonization was determined for females and cysts of Heterodera glycines on soybean roots or in rhizosphere soil from a Florida soybe an field. A total of 1,620 females and cysts were examined in 1991, an d 1,303 were examined in 1992. More than 35 species of fungi were isol ated from females and cysts. The frequency of fungi colonizing white a nd yellow females was low, but a high frequency of fungi was encounter ed in brown cysts, which increased with time of exposure of the cysts to the soil. No single fungal species predominated in the nematode fem ales or cysts in this field. Rarely was a female or cyst colonized by more than one fungus. The common fungi isolated from the females and c ysts were Neocosmospora vasinfecta, Fusarium solani, Fusarium oxysporu m, Dictyochaeta coffeae, Dictyochaeta heteroderae, Pyrenochaeta terres tris, Exophiala pisciphila, Gliocladium catenulatum, Stagonospora hete roderae, and a black yeast-like fungus. The communities of common fung al species isolated from cysts in several regions in the southeastern United States appear to be similar.