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1報) 拮抗菌のスクリ－ニング

Control of Fusarium disease using antagonistic actinomycetes : 1. Screening of antagonistic actinomycetes to Fusarium oxysporum

Creators Takaki Shigeki

Creators Kitamura Akira

Creators Marumoto Takuya

Antagonistic Actinomycetes to F. oxysporum f. sp. Licopersici and f. sp. raphani were screened for the control of Fusarium Desease. 1. Thirteen actinomycetes which showed a high antagonistic activity to F. oxysporum were selected by 1st and 2nd screenings. No harmful effects on the germination and growth of radish was observed. 2. Five actinomycetes selected from the 13 actinomycetes suppressed the infection of radish yellows compared with untreated control. 3. The five actinomycetes were identified as Streptomyces achromogenes, S. phaeopurpureus, S. hygroscopicus, S. nitrosporeus and S. baarnensis. 4. Antagonistic activity of Actinomycetes to F. oxysporum f. sp. raphani in laboratory experiments using petri dishes did not always coincide with the suppressive effect of Actinomycetes on radish yellows in soil infected with F. oxysporum f. sp. raphani. 5. These Actinomycetes showed an antagonistic activity to 7 strains of F. oxysporum. These antagonistic activities varied depending on the combination Actinomycetes and F. oxysporum used. The growth of the Actinomycetes selected by these screenings was different in media of pHs ranging from 5 to 8.

[ISSN]0912-2184

[NCID]AN00352796