使用除草剂防除杂草,必须首先了解杂草的特性,掌握作物、杂草、药剂、环境四者之间的相互关系,针对杂草的生理生态弱点,选用有效的除草剂、经济的用药量和适宜的施药期,以提高除草效果和对作物的安全性,这是化学除草的基本原则。近年来,我省推广扑草净、敌草隆防除稻田牙齿草,获得良好的成效。但是,我省自然条件复杂,各地草情和苗情不同,施药期掌握不当,则除草效果差,还易发生药 The use of herbicides to control weeds, we must first understand the characteristics of weeds, grasps the crops, weeds, pharmaceuticals, environment, the relationship between the four, for weeds physiological and ecological weakness, the selection of effective herbicides, the amount of economic dosing And appropriate application period to improve weeding effect and crop safety, which is the basic principle of chemical weeding. In recent years, the promotion of prometryn grass in our province, diuron prevention of dental grass in paddy fields, and achieved good results. However, the natural conditions in our province are complicated, with different grass and seedlings, improper application of herbicide, poor weeding effect and easy occurrence of drugs