植物源农药是指有效成分来源于植物体的农药,是取代化学农药,生产无公害农产品应优先选用的农药品种。蛇床子素蛇床子素是从伞形科植物蛇床干燥成熟的果实蛇床子中提取得到的有效成分,制剂为0.4%蛇床子素乳油。它以触杀作用为主,胃毒作用为辅,对十字花科蔬菜菜青 Plant-based pesticides refers to the active ingredients derived from plant-based pesticides, chemical pesticides to replace the production of pollution-free agricultural products should be the preferred pesticide varieties. Osthol The Osthol is an effective component extracted from the dried, fructified Cnidium of the Umbelliferae family. The preparation is 0.4% osthole cream. It is mainly to contact with the role of killing, supplemented by stomach poisoning, vegetables cruciferous vegetables green