用超临界CO2从除虫菊干花中萃取的除虫菊素，这种膏状物不能直接用来加工或深加工杀虫产品。

Extracted pyrethrins from pyrethrum dried flower by super critical CO2 . is a paste called oleoresin which isn't suitable to formulate insecticidal products either use in household or crops.

youdao

除虫菊素主要在除虫菊花中合成，其含量占整个植株的95%以上，而干花中除虫菊素含量在1.2 - 2.0%。

The pyrethrins are mainly synthesized in pyrethrum flowers and the content is more than 95%. The content in the dried flowers is about 1.2-2.0%.

youdao