植物油精製副生物と糖含有資材の混合施用による土壌還元消毒の効果

In this study, we evaluated the efficacy of anaerobic soil disinfestation with incorporation of a vegetable oil refining byproduct (VORB) and sugar-containing diatomite (SCD). It was found that incorporation of VORB alone at a dose of 0.4 to 1.0 t/10 a could reduce the soil layer (0–30 cm depth) where VORB had been mixed, thereby disinfecting Ralstonia solanacearum. It was also found that incorporation of SCD at 0.5 t/10 a in combination with VORB at 0.7 t/10 a could effectively reduce the deeper layer (30–50 cm depth) of soil and suppress the development of tomato bacterial wilt.