除虫菊用以治虫,已有悠久历史,早在十八世纪初即开始应用,但由于易光分解,因此应用受到限制。二十世纪七十年代中期以来,具光稳定性的高效拟除虫菊酯的问世,开创了化学农药的新局面。由于这类菊酯杀虫谱广,杀虫效果好,单位面积内用药量低 Pyrethrum used to pest control, has a long history, as early as the early eighteenth century began to apply, but due to easy to light decomposition, so the application is limited. Since the mid-1970s, the advent of highly photosynthetic pyrethroids has opened up new prospects for chemical pesticides. As these insecticidal spectrum of pyrethrins, insecticidal effect is good, low dosage per unit area