Cleome gynandra l extract, and preparation method and application thereof

The invention provides a preparation method of a cleome gynandra l extract, wherein the preparation method comprises the following steps: pulverizing cleome gynandra l, mixing the pulverized cleome gynandra l with a volatile organic solvent, carrying out ultrasonic treatment firstly, leaching, filtering, and concentrating to obtain the cleome gynandra l extract. Meanwhile, the invention further discloses the cleome gynandra l extract and an application thereof. It is found that the cleome gynandra l extract has a quite good effect when being used as an insecticide. Moreover, the cleome gynandra l and a pokeberry root extract are mixed for use, so that adults and larvae of flies can be effectively expelled and killed, and the combined use effect of the cleome gynandra l and the pokeberry root extract is superior to that of a single component. 本发明提供了一种白花菜提取物的制备方法，包括以下步骤：将白花菜粉碎后与易挥发有机溶剂混合，先用超声波处理，然后浸提过滤，浓缩得到白菜花提取物。同时，本发明还公开了白花菜提取物及其用途。并发现白花菜提取物在作为杀虫剂用途中有着非常好的效果。而且，将白花菜和商陆提取物混合使用能够有效驱赶和杀死苍蝇的成虫和幼虫，二者结合使用效果要优于单一组分的