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50年代初期,2,4-D 与2甲4氯的大面积使用,既促进了农田化学除草的迅速发展,也推进了除草剂品种的筛选与开发,如1951年发现灭草隆(monuron)后,促使迅速合成与试验了数千个脲类化合物,因为脲分子易被多种取代基取代。1952年发现了均三氮苯的活性,导致迅速开发出一系列新品种,70年代中期发现禾草灵(diclofop-methyl)活性后.通过结构改造及衍生物合成,很快开发出芳氧苯氧丙酸及环己烯二酮两类除草剂,1979年磺酰脲类除草剂第一个品种绿黄隆
In the early 1950s, the large-scale use of 2,4-D and 2-MCPD not only promoted the rapid development of field chemical weed control, but also promoted the screening and development of herbicide varieties. For example, monuron was found in 1951, , Prompted the rapid synthesis and testing of thousands of urea compounds, because urea molecules are easily substituted by a variety of substituents. The discovery of mesotiazide activity in 1952 led to the rapid development of a series of new varieties that were found after the discovery of diclofop-methyl activity in the mid-1970s through the structural modification and derivative synthesis, Oxypropionic acid and cyclohexene dione two types of herbicides, sulfonylurea in 1979 the first species of green Huanglong