我国农药市场中先后有100多个除草剂品种投入使用,使用面积前20位的产品占到全国农田化学除草总面积的75%左右。一些大型品种如甲草胺、丁草胺、乙草胺、莠去津、氟乐灵、杀草丹等销售量均出现不同程度的下降,而大幅增长的则多为新产品。由于新品种开发费用加大、注册花费增多、公众及环境压力增强,因而 China’s pesticide market has more than 100 varieties of herbicides into use, the use of the top 20 products of the total area of ​​?? chemical farming in our country accounts for about 75% of the total area. Some large-scale varieties such as alachlor, butachlor, acetochlor, atrazine, trifluralin, herbicide Dan and other sales have shown varying degrees of decline, while the substantial increase is mostly new products. Due to the increased cost of developing new varieties, increased registration costs and increased public and environmental pressure,