栽培技术对大麦黄花叶病影响的研究

一、引言上海郊区、县大麦种植面积约150万亩左右,约占郊区、县总耕地面积的28%。大麦生产对上海地区的农业和啤酒工业的发展具有重要的影响。目前,上海郊县大麦生产中突出问题是产量不稳,黄花叶病是其主要原因之一。黄花叶病从七十年代大面积流行以来,几乎年年发病,郊县每年明显发病的面积都在10万亩以上,1980年发病31万甫,估计损失粮食938万斤。

STUDIES ON THE INFLUENCE OF VARIETY AND FARMING PRACTICES ON BARLEY YELLOW MOSAIC VIRUS DISEASE(BYMVD)

BYMVD is an important disease on agricultural production in Shanghai area.Investigations and experiments on this disease were carried out at fifteen different places in eight counties.The results were summerized as fillows: 1.The resistance to this disease of a barley variety will be dicreased, When it planted continuously for years time.A tolerant variety757, for example,was changed to susceptible,when continuously planted for years.It is therefore to avoid planting of same single variety in thesame brigad...