美国环境保护署已经决定 ,到 2 0 0 1年 ,将禁止使用化学熏蒸剂溴甲烷 ,因为它会影响大气臭氧层 ,而代之以微波杀灭谷物和面粉中的害虫。此外有些害虫已对化学熏蒸剂产生耐药性 ,因此用传统化学药物熏蒸杀虫方法 ,难以奏效 ,这也需要发展微波加热法。由此 ,美国有关研究机构正 The U.S. Environmental Protection Agency has decided that methyl bromide, a chemical fumigant, will be banned by 2001 because it affects the atmospheric ozone layer and instead uses microwaves to kill pests in grains and flour. In addition, some pests have resistance to chemical fumigants, so using traditional chemical fumigation insecticidal methods, it is difficult to work, which also requires the development of microwave heating method. As a result, the relevant U.S. research institutes are positive