Pea Root Rot Development and Associated Pathogens in Ontario Fields. Andres A. Reyes, Research Scientist, Agriculture Canada, Vineland Station, Ontario, Canada L0R 2E0. Plant Dis. 64:392-393. 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, 1980. DOI: 10.1094/PD-64-392.

The severity of pea root rot in five fields in central Ontario increased as the season progressed. Fusarium solani f. sp. pisi was the fungus isolated most frequently from diseased roots and rhizospere soil, and its population density in the root tissues was directly related to disease severity. Pythium spp. were also isolated frequently (from plants sampled at the flowering stage) but were less abundant than F. solani f. sp. pisi. F. oxysporum f. sp. pisi and Rhizoctonia solani were encountered least from diseased roots. These fungi caused root rot on inoculated pea seedlings.

Keyword(s): Pisum sativum.