連作ハウスにおけるショウガ根茎腐敗病菌の動向と根茎腐敗病の発生経過

概要

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The present paper deals with the relation of changes in the pathogen population to the incidence and development of the rhizome rot disease of ginger in continuous indoor cropping for immature rhizome production. The number of seed pieces contaminated by the pathogen varies from year to year. Isolation of pathogen from the field soil sterilized prior to planting was failed. Results obtained from the present experiment indicated that the disease outbreak was caused by planting of infected seed pieces. The propagules of the pathogen increased in both rhizosphere and non-rhizosphere soils during and after the secondary infection, and form of the propagules in these soils was estimated to be mycelial fragments or sporangia-like bodies from microscopic observation of colonies growing on selective medium. The pathogen was still detected from a soil just before the planting of ginger, although it decreased in general remarkably during the preceding cropping in the same soil.
日本植物病理学会の論文
1981-04-25