近几年来,我省麦田草害日益突出。1982年全省麦田杂草二级以上发生面积(即密度达到化学防治指标的面积)据推算在900万亩左右,占三麦面积的25％。1985年上升到1600万亩,占三麦面积的40％。在麦子的病虫草三害中,杂草已占首位。我省麦田杂草的种类,在稻茬麦田,主要优势种有禾本科的看麦娘或硬草,阔叶杂草猪 In recent years, our province wheat field grass growing increasingly prominent. In 1982, the occurrence of secondary or higher incidence of weeds in wheat fields in the province (that is, the area with the density reaching the target of chemical prevention and control) was estimated to be about 9 million mu, accounting for 25% of the total area of ​​Sanmai. In 1985 it rose to 16 million mu, accounting for 40% of the total area of ​​Sanmai. Weeds in the wheat three diseases, weeds have been the top. The types of wheat weeds in our province, in the rice fields, the main dominant species are gramineous to see Aden or hard grass, broadleaf weed pigs