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一、设想的由来我国在七十年代发展的有机磷杀虫剂甲胺磷,因具有:①化学结构简单、新颖。②效果突出:如对水稻飞虱、叶蝉、稻纵卷叶螟、粘虫等都有很好的防效,且常常起到一药兼治的作用。③合成工艺不复杂,对设备没有特殊要求。④原料易于本地解决。⑤生产和农用成本都比较低,在工业和农业上都能取得较好的经济效益。⑥口服急性毒性虽高,但药剂本身有较大的水溶性和较小的脂溶性,以致在使用上比
First, the origin of the idea China’s development in the seventies organophosphate pesticide methamidophos, due to: ① chemical structure is simple and novel. ② outstanding results: such as the rice planthopper, leafhopper, rice leaf roller, armyworm and so has a good control effect, and often play a role in both medicine and cure. ③ synthesis process is not complicated, there is no special equipment requirements. ④ raw materials easy to solve locally. ⑤ production and agricultural costs are relatively low, both in industry and agriculture can achieve better economic returns. ⑥ oral acute toxicity is high, but the agent itself has a larger water-soluble and less fat-soluble, resulting in the use of more than