The invention provides natural pyrethrins pollen and the preparation method thereof.
本发明为天然除虫菊素花粉剂及制备方法。
Objective To observe the efficacy of pyrethrins aerosol against cockroaches by bioassay.
目的通过生物测试，观察天然除虫菊素杀虫气雾剂对蟑螂的药效。
Nearly 90% of exposures involved insecticides containing pyrethroids, pyrethrins or both.
将近90%的杀虫剂都含有除虫菊酯或者虫菊酯或者兼而有之。
Conclusion Pyrethrins aerosol was safe for use and had high efficacy. It should be generalized.
结论天然除虫菊素杀虫气雾剂具有安全，高效等特点，值得推广应用。
To study oxidative damage of II-Pyrethrins on brains of mice and the mechanism of its toxic effect.
探索II -型拟除虫菊酯类农药对小鼠脑的氧化损伤作用及其毒理作用机制。
Azadirachtin, Pyrethrins and Rotenone are toxic to non-target organisms, especially high risk for Bombyx mori Linaeus.
印楝素、除虫菊素和鱼藤酮对非靶标生物的毒性较高，尤其对家蚕风险性大。
At present, natural pyrethrins have been widely used in agriculture, forestry, biological pesticides, food hygiene and safety and other fields.
目前，天然除虫菊素已广泛应用在农业、林业、生物农药和食品卫生安全等多个领域。
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%.
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%。
Improving the content of pyrethrins in pyrethrum through genetic engineering technology is restricted, for little is known about pyrethrins-related genes.
但国内外对于天然除虫菊素合成相关基因的研究很少，从而制约了利用基因工程技术提高除虫菊花中除虫菊素的含量。
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.
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.
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。
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