Casida J E
Environ Health Perspect. 1980 Feb;34:189-202. doi: 10.1289/ehp.8034189.
The natural pyrethrins from the daisy-like flower, Tanacetum or Chrysanthemum cinerariifolium, are nonpersistent insecticides of low toxicity to mammals. Synthetic analogs or pyrethroids, evolved from the natural compounds by successive isosteric modifications, are more potent and stable and are the newest important class of crop protection chemicals. They retain many of the favorable properties of the pyrethrins.
来自类似雏菊的花朵——菊蒿或除虫菊（Chrysanthemum cinerariifolium）的天然除虫菊酯，是对哺乳动物毒性较低的非持久性杀虫剂。合成类似物或拟除虫菊酯是通过连续的等排修饰从天然化合物演变而来的，它们效力更强、更稳定，是最新一类重要的作物保护化学品。它们保留了许多除虫菊酯的有利特性。
