Pathogenicity of Cylindrocladium clavatum to Pea, a New Host, and Preliminary Evaluation of Its Virulence. C. A. Lopes, Research Plant Pathologist, Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Hortaliças, Caixa Postal 11.1316, 70.000 Brasília, D.F., Brazil. F. J. B. Reifschneider, Research Plant Pathologist, Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Hortaliças, Caixa Postal 11.1316, 70.000 Brasília, D.F., Brazil. Plant Dis. 66:951-953. Accepted for publication 19 May 1982. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1982. DOI: 10.1094/PD-66-951.

Cylindrocladium clavatum causes a foot rot of field-grown peas in central Brazil, a new host record. Field symptoms—yellowing, wilting, and death—are similar to those caused by Fusarium solani. The pathogenicity of two isolates of C. clavatum obtained from peas was compared with that of three isolates from potatoes in a greenhouse. All five isolates were pathogenic to both peas and potatoes, two isolates from potato being the most pathogenic to peas. This apparently is a new disease of peas in Brazil.

Keyword(s): Pisum sativum, resistance, root rot.