在实际工作中,我们发现,许多农友对农药的选用带有很大的盲目性和随他性,有的甚至把用惯的农药看作“万能药”,不管是病、虫还是草,动辄就喷,不但收不到应有的防治效果,增加了生产成本,还延误了防治适期,伤害了天敌,污染了环境。那么,如何正确选用化学农药呢?首先,从农药防治的对象来看,有病菌、害虫、杂草、害鼠和害螺等,不同的防治对象对药剂的反应各不相同。据此,农药有杀虫剂、杀螨剂、杀菌 In actual work, we find that many farmers choose to use pesticides with great blindness and follow others, and some even use the pesticides as “panacea”. Whether it is sickness, insects or grass, Spray at every turn, not only failed to receive the proper control effect, increased production costs, but also delayed the appropriate control, hurt natural enemies, pollute the environment. So, how to choose the right chemical pesticides? First of all, from the perspective of the object of pesticide control, there are bacteria, pests, weeds, rodents and snails and so on, different control objects respond differently to the agent. Accordingly, pesticides have insecticides, acaricides, sterilization