連作および輪作圃場のインゲンと土壌から分離されたPythium spp. とその病原性

概要

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Seven Pythium species ; ie. P. acanthophoron, P. irregulare, P. myriotylum, P. spinosum, P. paroecandrum, P. ultimum, and an unidentified Pythium sp., were isolated from the hypocotyls, roots, rhizosphere and/or non-rhizosphere soils of bean plants grown in the experimental plots of monoculture and rotation in Hokkaido Prefectural Kitami Agricultural Experiment Station. Among these, Pythium myriotylum was found only from the monoculture plots. The bean plants grown in the monoculture plots were colonized by above mentioned seven species of Pythium, while those in the rotation plots by P. spinosum, P. paroecandrum, and P. ultimum. In inoculation tests with five Pythium spp. except P. acanthophoron and P. irregulare which were rarely isolated, P. myriotylum and Pythium sp. were the most pathogenic to bean seedlings, followed by P. spinosum. Other two Pythium spp. have poor pathogenicity.
日本植物病理学会の論文
1981-07-25