近年来由于连年使用以除稗为主的除草剂,使稗草的危害基本得到控制,同时带来了稻田杂草群落的变化,在一些稻田中,眼子菜、三棱草、慈菇等多年生杂草的危害日益加重。这些杂草的特点是繁殖力强、根深叶茂、遮光、降温、争肥,造成水稻减产。目前我区稻农通常在插秧后,采用杀草丹(或丁草胺、禾大壮)防除一遍稗草,于水稻分蘖末期用二甲四氯防除三棱草,或用五二扑防除眼子菜,有的还需人工拔草。这样使除草用工及药剂成本成倍提高。因此广大稻农迫切希望有一种一 In recent years, due to the successive use of barnyard-based herbicides, the harm of barnyardgrass was basically controlled, and brought changes in the weed community in paddy fields. In some paddy fields, Perennial weeds harder and harder. These weeds are characterized by strong fertility, deep roots, shading, cooling, fertilization, resulting in reduced production of rice. At present, rice farmers in our region usually use barracudon (or butachlor and chlorambucil) to control barnyardgrass again after transplanting, and use trimethoprim (SC) Sub dishes, some also need artificial weeding. This makes weeding workers and pharmaceutical costs doubled. Therefore, the majority of rice farmers are eager to have one