メロンつる割病菌のクロダネカボチャへの無病徴感染

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  • 野村 良邦
    野菜・茶業試験場久留米支場 富山県農業技術センター野菜花き試験場

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タイトル別名
  • Infection without Symptom Appearance of Fusarium oxysporum f. sp. melonis on Cucurbita ficifolia.
  • メロン ツルワレビョウキン ノ クロダネカボチャ エ ノ ム ビョウチョウ カ

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Pathogenicity of Fusarium causing wilts on Cucurbitaceous plants was examined. Cucurbita ficifolia and C. maxima were attacked by Fusarium oxysporum f. sp. lagenariae, but not by F. oxysporum f. sp. melonis, f. sp. cucumerinum, f. sp. niveum and f. sp. luffae. But C. ficifolia was infected with F. oxysporum f. sp. melonis without external symptom, because the pathogen was isolated in a high rate from the hypocotyl tissues with browned vascular bundles. Therefore it was considered that C. ficifolia infected with F. oxysporum f. sp. melonis might wilt acutely under bad conditions. On the other hand, neither symptom nor symptomless infection by the above five pathogens was recognized in C. moschata, C. pepo and C. maxima×C. moschata.

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