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经过半个多世纪艰苦卓绝的工作,科学家们逐步搞清楚了天然除虫菊的杀虫成分及其化学结构,并以此为模板先后合成了一系列的拟除虫药酯。1954年,第一个人工合成的拟除虫菊酯(丙烯菊酯)问世,其化学结构较除虫菊素1简单,而药效优于除虫菊素1和当时使用的 DDT 及有机磷农药,从而开创了拟除虫菊酯研究的新时代,至今刚好半个世纪。当研究深入到分子立体结构水平,发现菊酯类农药大都具有旋光异构体,且其高效
After more than half a century of arduous work, scientists gradually figured out the insecticidal components of natural pyrethrum and its chemical structure, and used it as a template to synthesize a series of pesticides. In 1954, the first synthetic pyrethroid (alfalfa) came out. Its chemical structure is simpler than that of pyrethrin 1, and its efficacy is superior to that of pyrethrin 1 and DDT and organophosphorus pesticide used at that time. Pyrethrins a new era of research, it is just half a century. When the research went deep into the level of molecular stereoscopic structure, most of the pyrethroid pesticides were found to have optical isomers, and their high efficiency