Relationships between the occurrence of root tumor of melon and soil inoculum density and soil sterilization

The concentration of pathogenic Streptomyces sp. and sterilization of soil affected the occurrence of root tumor of melon under inculation tests. Young growing melon inoculated with a high concentration of the pathogen showed symptoms of damping-off, and the severity varied with the type of soil use...

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Bibliographic Details
Published inKyushu Plant Protection Research Vol. 40; pp. 38 - 42
Main Authors Yoshida, M. (Kyushu Tokai Univ., Choyo, Kumamoto (Japan). Faculty of Agriculture), Kobayashi, K
Format Journal Article
LanguageJapanese
Published The Association for Plant Protection of Kyushu 1994
Subjects
CUCUMIS MELO
ENFERMEDADES DE LAS PLANTAS
ESTERILIZACION DEL SUELO
MALADIE DES PLANTES
PLANT DISEASES
SOIL STERILIZATION
STERILISATION DU SOL
STREPTOMYCES
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Summary:The concentration of pathogenic Streptomyces sp. and sterilization of soil affected the occurrence of root tumor of melon under inculation tests. Young growing melon inoculated with a high concentration of the pathogen showed symptoms of damping-off, and the severity varied with the type of soil used. Occurrence of root tumor was observed in soil inoculated with more than about 10 cfu of the pathogen per 1 ml of wetted soil. The most sever disease incidence of root tumor appeared when melon was inoculated with about 103-104 cfu/ml of the soil. In addition, the disease occurred easily in soil which was inoculated with the pathogen after soil sterilization, but the occurrence of the disease in inoculated soil without sterilization was suppressed conspicuously. The results suggest that the occurrence of root tumor of melon is encouraged at a lower concentration of microorganisms and with a limited microflora in soil.
Bibliography:9507756
H20
ISSN:0385-6410
1884-0035
DOI:10.4241/kyubyochu.40.38