A fungus which has high infectivity toward a stem, leaf, bud, or flower nematode and is characterized by the production of a first type of conidiophores, conidiogenous cells, and conidia and a second type of conidiophores, conidiogenous cells, and conidia when grown in vivo or on a solid medium. The first type of conidiophores is macronematous, mononematous, simple, erect, and broadly ampulliform； the first type of conidiogenous cells is integrated, phialidic, and rarely percurrent； and the first type of the conidia is solitary, one-celled, asymmetrically ellipsoidal, lunate, and concave. The second type of conidiophore is macronematous, mononematous, simple or branched, cylindrical, subulate, and elongate； the second type of conidiogenous cells is integrated, phialidic, enteroblastic, terminal or intercalary, laterally proliferic, and indeterminate； and the second type of conidia is solitary, one-celled, bacilloid, and cylindrical.
