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一、从手推喷筒谈起除害灭虫,是人类与自然界作斗争的一个重要方面。在农业上,直接关系到夺取粮棉丰收;在卫生防疫上,直接关系到保障人民的身体健康。人们为了与病虫害作斗争,想尽了各种各样的办法,研究制造能有效杀灭病虫害的药物。有的药物可以用诱捕法使病虫上饵,但大部分药物,需要用适当的器械将它喷洒于病虫栖息地来达到对病虫杀灭的目的,因为对病虫进行有选择地直接喷洒是办不到的。
First, it is an important aspect of the fight between mankind and nature that pest and pest control should be talked about from hand-propeller nozzles. In agriculture, it is directly related to the seizure of grain and cotton harvest. On the epidemic prevention and sanitation, it is directly related to ensuring the people’s health. In order to combat pests and diseases, people have tried all kinds of ways to study the manufacture of drugs that can effectively kill pests and diseases. Some drugs can be trapping bait, but most of the drugs, the need to use appropriate equipment to spray it in the habitat of pests to achieve the purpose of killing pests, pests and diseases because of the selective direct Spraying can not be done.