Biocontrol of Aphanomyces Root Rot and Pythium Damping-Off by<i>Pseudomonas cepacia</i>AMMD on Four Pea Cultivars

Abstract

Pseudomonas cepacia strain AMMD applied as a seed treatment has been used for biocontrol of Pythium damping-off and Aphanomyces root rot of peas. We tested the biocontrol efficacy of this strain on four pea cultivars that differed in susceptibility to Aphanomyces root rot. In 1990 and 1991, seedling emergence, Aphanomyces root rot severity, and pea yield of biocontrol-treated and nontreated controls were compared in a field naturally infested with Pythium spp. and Aphanomyces euteiches f. sp. pisi