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随着盛夏的来临,新一轮的“人蚊大对抗”开始了.讨厌的蚊子越来越难以对付,如果灭蚊产品使用过量或使用不当,会影响我们的健康,因此我们必须掌握夏季常用的驱蚊方法.人类最早发现的杀虫剂是菊科植物除虫菊(见图1)中的天然除虫菊酯,但是除虫菊酯被提炼出来后,置于空气中会发生化学反应,从而丧失杀虫作用.除虫菊酯复杂的化学结构到20世纪40年代才被研究确定,此后开始了类似物质的合成研制,最终制得简单的杀虫剂.蚊
With the advent of summer, a new round of “mosquito big confrontation ” began.Nasty mosquito more and more difficult to deal with, if the use of mosquito products in excessive or improper use, will affect our health, so we must master Common mosquito repellent method in summer.Human first discovered insecticide pyrethrum pyruvate (see Figure 1) in the natural pyrethrins, but after the pyrethroids are refined out, placed in the air chemical reaction, which lost to kill The complex chemical structure of pyrethrins was not established until the 1940s and the subsequent synthesis of similar materials began to produce simple insecticides.