Association of a Species of Itersonilia with Parsnip Canker in Great Britain

Abstract

A SPECIES of Itersonilia Derx was isolated by Wilkinson¹ in 1952 from cankers on parsnip roots in the United States. He did not publish a species identification, nor did Sowell² in a later note on the fungus; but cultures were afterwards lodged by Sowell at the Centraalbureau voor Schimmelcultures, Baarn, under the name I. perplexans. Wilkinson demonstrated the pathogenicity of the fungus and showed that it was also responsible for lesions on the leaves. I have made similar observations in Britain.