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大麦黄花叶病是近几年来在浙江、上海、江苏、湖北等省市部分地区发现的一种新病害。上海市郊以宝山、川沙、嘉定、南汇、上海几县危害较重;奉贤、金山、青浦、松江、崇明亦有发现。特别是1973年以来,随着大麦播种面积的增加和感病品种的推广,发病面积逐年扩大,病情亦逐年加重。大麦黄花叶病严重影响大麦产量。一般发病田减产三四成,严重病田引起死苗,不得不翻耕改种其他作物。同时,从病害的发展趋势来看,有扩大和加重的可能,并有向其他地区蔓延的危险。因此,大麦黄花叶病已成为影响三熟制茬口安排和大麦稳产高产的重
Barley yellow mosaic disease is a new disease discovered in recent years in Zhejiang, Shanghai, Jiangsu, Hubei and other provinces and cities. Shanghai suburbs to Baoshan, Chuansha, Jiading, Nanhui, Shanghai, a few more serious harm to the county; Fengxian, Jinshan, Qingpu, Songjiang, Chongming also found. Especially since 1973, with the increase of sown area of barley and the promotion of susceptible varieties, the area of incidence has been expanding year by year, and its condition has also been increasing year by year. Barley yellow mosaic disease severely affects barley yield. In general, the yield of field crops is reduced by 34% and serious disease is caused by seedlings. Other crops have to be switched to other crops. At the same time, from the viewpoint of the development trend of diseases, there is the possibility of expansion and aggravation and the danger of spreading to other areas. Therefore, barley yellow mosaic disease has become the impact of triple crop arrangements and barley stable yield and high yield