Relationship between root length density and decrease in population of Phialophora gregata f. sp. adzukicola

概要

論文の詳細を見る
It has been reported that the population of Phialophora gregata f. sp. adzukicola, the pathogen of brown stem rot of adzuki bean, remarkably decreased in soil cultivated with corn. The mechanisms controlling the decrease in the population of the pathogen have not been clarified. We examined the relationship between the root length density and populations of P. gregata f. sp. adzukicola in the soils cultivated with corn, adzuki bean, soybean, and wheat, respectively. The population of the pathogen decreased in the rhizosphere of all the four crops tested. It is suggested that a non-specific rhizosphere effect was involved in the decrease of the population of the pathogen. In furrow soils the populations of the pathogen did not decrease in the adzuki bean plot, unlike in the other three plots. In corn, soybean, and wheat plots, the root length density in the furrow soil was higher than that in the adzuki bean plot. On the basis of these results, it is suggested that the population of P. gregata f. sp. adzukicola in soil decreased when a crop with a large rooting zone and high root length density was cultivated.
日本土壌微生物学会の論文
1995-03-01