PROBLEM TO BE SOLVED: To develop a microbial material effective for root vegetables and to provide a technique for stably obtaining good field crops even in an upland field where injury by continuous cropping is found, suppressing the occurrence of the injury by continuous cropping and achieving the transfer to environmental preservation type agriculture when the microbial material is applied to the actual upland field.SOLUTION: The method for controlling the injury by continuous cropping is characterized as follows. The soil analysis of the upland field is carried out before planting of the root vegetables to measure the density of Streptomyces scabies in the upland field according to the amount of nec-1 gene. The amount of the microbial material applied to the upland field is controlled by the amount of the resultant nec-1 gene.COPYRIGHT: (C)2006,JPO&NCIPI【課題】根菜類に有効な微生物資材を開発し、該微生物資材を実際の畑に適用した場合に、連作障害のみられる畑でも健全な農作物が安定して得られ、連作障害の発生を抑制でき、環境保全型の農業への移行を実現できる技術の提供。【解決手段】根菜の植えつけの前に畑の土壌分析を行って、当該畑におけるそうか病菌の密度をnec-1遺伝子量で測定し、得られたnec-1遺伝子の量によって該畑に施用する微生物資材の量を制御することを特徴とする連作障害の制御方法。【選択図】 図1
