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目前,世界各国对贮藏的谷物采用了多种杀灭和预防害虫的方法,归结起来有化学方法、物理方法和生物方法等,效果各不相同。化学防虫杀虫方法效果显著,成本也较低。烟熏法是化学方法之一,使用的烟熏剂有多种,使用效果及副作用有些区别。例如使用溴甲烷时,效果显著,但对环境有一定的污染,甚至对臭氧层也有影响,而且用过以后谷物中残留一些臭味。使用磷化氢作烟熏剂时,操作方便,效果好,成本也较低,但美中不足
At present, various countries in the world have adopted a variety of methods for killing and preventing pests of stored grains, which can be summarized as chemical methods, physical methods and biological methods. Chemical insecticide insecticidal method is effective, the cost is lower. Fumigation is one of the chemical methods, the use of a variety of fumigants, the use of effects and side effects are somewhat different. For example, the use of methyl bromide, the effect is significant, but some pollution to the environment, and even have an impact on the ozone layer, and used after some residual smell of cereal. The use of phosphine as a fumigant, easy to operate, the effect is good, the cost is lower, but fly in the ointment