水稲ロングマット水耕育苗法における種子温湯浸漬によるイネばか苗病の防除効果

抄録

In the long-mat type hydroponic rice seedling method, rice seeds were soaked into hot water at 60°C or 62°C for 15 minutes to control the bakanae disease instead of using seed disinfectants. Germination rate of the hot-water soaked seeds was 6%-12% lower than the non soaked seeds, but the seedlings grew normally on the seedling beds and field. Using infected seeds, the number of bakanae plants on the seedling beds and field was reduced by the hot water treatment and did not differ significantly from a seed disinfectant treatment. These results suggest that soaking the seeds into hot water before sowing is effective against bakanae disease and could be used in the hydroponically raised seedling method.