An Emendation of the Genus Itersonilia Based on Studies of Morphology and Pathogenicity

Abstract

SUMMARYThe genus Itersonilia is emended on the basis of variation in monocaryophase and dicaryophase cultures. Probable synonyms include two other genera of the Sporobolomycetaceae, Tilletiopsis and Sporidiobolus, and the proposed but invalid genus Entylomella (representing conidial states of Entyloma and other smut fungi). The isolates of Itersonilia responsible for leafspot and canker of parsnip, Pastinaca sativa L., in the United States are considered to represent I. perplexans Derx.