The pyrethrins are a class of organic compounds normally derived from Chrysanthemum cinerariifolium that have potent insecticidal activity by targeting the nervous systems of insects. Pyrethrin naturally occurs in chrysanthemum flowers and is often considered an organic insecticide when it is not combined with piperonyl butoxide or other ...

是由除虫菊花(Pyreyhrum cineriifoliun Trebr)中分离萃取的具有杀虫效果的活性成分． 它包括除虫菊素I（pyrethrins Ⅰ）、除虫菊素II（pyrethrins II）、瓜叶菊素I（cinerinⅠ）、瓜叶菊素II（cinerin II）、茉酮菊素I（jasmolin I）、茉酮菊素II（jasmolin I）组成的。

Pyrethrins are pesticides found naturally in some chrysanthemum flowers. They are a mixture of six chemicals that are toxic to insects. Pyrethrins are commonly used to control mosquitoes, fleas, flies, moths, ants, and many other pests. Pyrethrins are generally separated from the flowers. However, they typically contain impurities from the flower.

2024年8月9日 · Pyrethrin insecticides are effective against a wide variety of insects, including soft-bodied chewing and sucking insects such as aphids, leafhoppers, mealybugs, spider mites, stink bugs, scale, thrips, and whiteflies. Many manufacturers market pyrethrin insecticides, but these solutions are often synthetic versions that have added chemicals.

Six individual chemicals have active insecticidal properties in the pyrethrum extract, and these compounds are called pyrethrins. Pyrethrum looks like a tan-colored dust as ground flowers or a syrupy liquid as the crude extract.

2020年3月24日 · 更深入的研究表明，除虫菊酯其实是相当复杂的混合物，除了最主要的pyrethrin I和pyrethrin II成分外，不同“片段”互相组合还有四种含量较少的化合物，这些化合物结构上虽有差异，却都具有杀虫作用。 除虫菊酯的杀虫谱比较广，能够杀灭许多卫生和农林害虫，并且无抗药性，对人和其他温血动物的毒性也很小，但由于它对光的稳定性差，所以只适合在室内用于防治蚊、蝇，以及蟑螂等卫生害虫，不宜作为农药在田间进行喷洒使用。 图 7 成分复杂的除虫菊酯混 …

Pyrethrins, derived from certain plant species, have long been recognized for their potent insecticidal properties. The review begins by examining the classification of pyrethrins and pyrethroids, elucidating their structural characteristics and unique features within the field of natural and synthetic compounds.

2009年7月30日 · Pyrethrins are naturally-occurring compounds with insecticidal properties that are found in pyrethrum extract from certain chrysanthemum flowers. The pyrethrins are often used in household insecticides and products to control insects on pets or livestock. (L857, L889, L890) L857: ATSDR - Agency for Toxic Substances and Disease Registry (2003).

These modern synthetic insecticides are similar chemically to natural pyrethrins, but pyrethroids are modified to increase stability in the natural environment. They are now widely used in agriculture, in homes and gardens, and for treatment of ectoparasitic disease. There has been increasing use of these agents as use of organophosphate pesti -

2023年11月29日 · Pyrethrins, derived from certain plant species, have long been recognized for their potent insecticidal properties. The review begins by examining the classification of pyrethrins and pyrethroids, elucidating their structural characteristics and unique features within the field of natural and synthetic compounds.