近几年新建高大平房仓的投入使用,大大改善了粮食仓储条件,环流熏蒸技术也得到了广泛应用,但是由于各地区条件的差异,磷化氢的施药浓度各不相同。本实验通过对几个条件相似的仓房采用不同的磷化氢浓度施药,比较各仓房害虫的死亡率,以得到适合本地区的磷化氢浓度下限,为完善环流熏蒸技术提供科学数据。 In recent years, the construction of new high-rise warehouse has been put into operation, which has greatly improved grain storage conditions. Circulation fumigation technology has also been widely used, but due to the different conditions in different regions, the application concentration of phosphine varies. In this experiment, we applied different concentrations of phosphine to several barns with similar conditions to compare the mortality of pests in each silo so as to obtain the lower limit of phosphine concentration suitable for the region, thus providing scientific data for improving circulating fumigation technology.