农药的种类很多,性质各异.现仅就杀虫剂与杀菌剂的杀虫杀菌作用及其防治原理介绍如下:杀虫剂根据防治害虫的原理.杀虫剂具有以下作用。1.触杀作用:药剂从害虫的体壁进入体内,产生的毒害作用称为触杀作用。以触杀作用为主的药剂,称为触杀剂.如除虫菊、鱼藤、烟碱制剂、滴滴涕、666与1605等。除虫菊、鱼藤与烟碱制剂等必须直接喷洒 There are many kinds of pesticides and different properties. The insecticidal and bactericidal effects of insecticides and bactericides and their prevention and cure are described below. Pesticides According to the principle of pest control, the insecticides have the following functions. 1. Touch effect: Pharmacy from the pest body wall into the body, the poisoning effect is called contact action. To contact with the main role of the agent, known as touch agent, such as pyrethrum, Rhodiola, nicotine preparations, DDT, 666 and 1605 and so on. Pyrethrum, rattan and nicotine preparations must be sprayed directly