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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。
I. Introduction The planting area of barley in the suburbs and counties of Shanghai is about 1.5 million mu, accounting for about 28% of the total cultivated area in the suburbs and counties. Barley production has an important impact on the development of agriculture and beer industry in Shanghai. At present, the prominent problem in the production of barley in suburban Shanghai is that the yield is unstable and the yellow mosaic disease is one of the main reasons. Since the widespread epidemic of yellow mosaic disease in the seventies, almost every year incidence, suburban counties have an apparent incidence of more than 100000 acres, the incidence of 310000 in 1980, an estimated loss of 9.38 million pounds of food.