インゲン根腐病発病抑止土壌における病原菌大型分生胞子の発芽阻害と土壌微生物

概要

論文の詳細を見る
The macroconidial germination of Fusarium solani f. sp. phaseoli was inhibited in the field soil of Kitami Agricultural Exp. Sta. in Kun-neppu (K-soil) which was suppressive to common bean root rot. The inhibition was nullified by autoclaving or steaming (60-82C), and partially nullified by γ radiation of the soil. It was re-established when the autoclaved soil was inoculated with a small amount (1/100) of original soil or Tokachi soil which is conducive to the disease. Also, it was partially re-established by the inoculation with the water extract of K-soil ; but was failed to re-establish when the extract was autoclaved or filtered through membrane filter. From these results, the suppression of germination in K-soil was suggested to be biological origin. Furthermore, in autoclaved, aerated steamed or γ radiated K-soil, the germination rate of macroconidia was slow in comparison with equally treated conducive Tokachi soil and the morphology of germ tubes was abnormal. This germination delaying effect found in sterilized K-soil possibly operates in untreated K-soil and concerned with the inhibition of germination of macroconidia.
日本植物病理学会の論文
1981-01-25