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一、六十年代以来国外除草剂发展简况农田杂草对农作物的危害很大,影响收成,严重的能导致颗粒无收。人工除草往往要耗费较多的工时,劳动强度也大。而使用除草剂则具有除草效果好,既省工又增产,经济效益显著等优点,因此发达资本主义国家已普遍推广使用除草剂。进入六十年代后,国外除草剂的发展十分迅速,有关资料表明,1960年除草剂在世界农药销售总额中仅占20%,1970年上升到34.8%,在这10年间,每年平均以18.7%的速度增长。进入七十年代以后,除草剂的销售额仍然每年平均以17.6%速度继续增长,至1980年已占农药销售总额的41.0%,在农药中
First, the sixty time since the development of foreign herbicides Farmland weeds great harm to crops, affecting the harvest, can lead to serious crop failure. Artificial weeding often consume more man-hours, labor intensity is also large. The use of herbicides has the weeding effect is good, both labor and production, significant economic benefits, so developed capitalist countries have generally promoted the use of herbicides. Since the 1960s, the development of herbicides abroad has been very rapid. According to the data, herbicides accounted for only 20% of the total pesticide sales in the world in 1960 and 34.8% in 1970. In these 10 years, the average annual rate of herbicides was 18.7% The speed of growth. After entering the seventies, sales of herbicides continued to grow at an average annual rate of 17.6%. By 1980, they accounted for 41.0% of the total pesticide sales. In pesticides