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Control of Fusarium disease using antagonistic actinomycetes : 5. Mechanisms of control of radish yellows with microbial inoculum (Material A)

土と微生物 Volume 49 Page 27-33
published_at 1997
2007020057.pdf
[fulltext] 2.38 MB
Title
拮抗能を持つ放線菌を利用したフザリウム病害の抑制 : (第5報) 拮抗微生物資材Aによるダイコン萎黄病抑制機構
Control of Fusarium disease using antagonistic actinomycetes : 5. Mechanisms of control of radish yellows with microbial inoculum (Material A)
Creators Takaki Shigeki
Creators Kitamura Akira
Creators Marumoto Takuya
Creators Tanaka Shuhei
Creators Nishiyama Masaya
Creators Ishida Daisaku
Creator Keywords
Fusarium oxysporum chlamydospore radish yellows soil fungistasis biological control
Mechanisms of control of radish yellows by using a microbial inoculum (Material A) which contains antagonistic Actinomycetes against Fusarium oxysporum f. sp. raphani with an organic carrier were investigated. First, a method for determining the chlamydospore density of F. oxysporum in soil was newly developed to enable a more accurate determination of the chlamydospore density in soil. Secondly, the effect of Material A on the control radish yellows was examined in pot experiments. The suppressive effect of Material A varied with the time of application and sowing. Material A did not exert a significant effect on the total Fusarium density but increased the density of the chlamydospores in soil. The disease was well controlled in the soil where the density of chlamydospores was high and that of infection forms, mycelia and conidia, of the fungus was low at the time of sowing. Thirdly, the effect of Material A on F. oxysporum was examined in Petri dishes. Material A suppressed the germination of chlamydospores and subsequent hyphal growth, resulting in a high density of chlamydospores and subsequent hyphal growth, resulting in a high density of chlamydospores in soil. The results obtained suggest that the enhancement of soil fungistasis is one of the mechanisms of control of radish yellows by Material A.
Subjects
農学 ( Other)
Languages jpn
Resource Type journal article
Publishers 日本土壌微生物学会
Date Issued 1997
File Version Version of Record
Access Rights open access
Relations
[ISSN]0912-2184
[NCID]AN00352796
Schools 農学部