苏州市70年代以前,水稻大田杂草以禾本科、莎草科杂草为主。大面积推广使用除草醚以后,稻田草相发生了变化,局部地区阔叶草已上升为主要杂草。为寻求解决单、双子叶混生田块的草害,1990年全市组织了7个试验点对昆山化学复合剂厂提供的10％苄嘧磺隆和丁草胺的复合剂(下称10％苄丁微粒剂)进行了水稻大田除草试验。一、材料与方法 (一) 供试药剂 1.10％苄丁微粒剂(昆山化学复合剂厂产);2.10％丁草胺微粒剂(昆山化学复合 Before the 1970s in Suzhou City, the weeds in rice fields were dominated by grasses and sedge families. Large-scale promotion of the use of weed-ethers, paddy grass has changed, in some areas broad-leaved grass has risen to the main weeds. In order to find a solution to the pests of monoculture and dicotyledon mixed fields, in 1990, the city organized 7 pilot sites to test the mixture of 10% bensulfuron-methyl and butachlor provided by Kunshan Chemical Compounding Factory (hereinafter referred to as 10% benzyl Ding micro-particles) for rice field weeding test. Materials and methods (a) for the test agent 1.10% benzyl Ding Micron (Kunshan Chemical Complex Factory production); 2.10% Butachlor micro-agent (Kunshan Chemical Complex