几十年来,由于大量的农药进入自然界,致使环境污染,并且在生物体内富集和残留,引起人们广泛的注意。此外,由于害虫对农药的耐药性,亦使原有的农药逐渐失去其使用价值。为了解决农业上的需求,必须寻找更多高效低毒并易于降解的新的杀虫剂。对目前暂不能取代的毒性大但药效高的杀虫药则改变其剂型,使其药效持久,减少用量,从而减少对人类的危害。 For decades, due to a large number of pesticides into the natural world, resulting in environmental pollution, and enrichment and residue in living organisms, aroused widespread attention. In addition, due to pest resistance to pesticides, but also the original pesticide gradually lost its value. In order to solve the agricultural needs, we must find more efficient and low toxicity and easy degradation of new insecticides. The current can not be replaced by the toxic but highly effective insecticide is to change its dosage form, so that its long-lasting efficacy, reduce dosage, thereby reducing the harm to humans.