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自六十年代以来,麦类黄矮病(BYDV)在我国严重流行达五次之多,每次减产20—30％。仅北方麦区因该病为害,每年至少减产40亿斤左右。山西省北部于1978、1979、1980三年曾大流行,春小麦、莜麦发病面积达500万亩,年损失3亿多斤。目前,国内外防治这一病害的方法仍采用治蚜防病法,即通过消灭病害的传毒介体——麦蚜来控制病害流行。但是麦蚜发生数量的多少取决于多种因素,同时麦蚜可随高空气流作远距离的迁飞和降落,给局部性的预测预报带来困难。国外用病毒提纯、血清反应等方法搞测报,但都必须借助电镜技术。我国当前
Since the 1960s, wheat yellow-dwarf disease (BYDV) has been endemic in China for up to five times, yielding 20-30% of each reduction. Only the northern wheat area is at least 4 billion kilograms less produced annually due to the disease. In the northern part of Shanxi Province in 1978,1979,1980 three years had a pandemic, spring wheat, scallion disease area of 5000000 acres, the annual loss of 300000000 kilograms. At present, at home and abroad to prevent and treat this disease is still using aphid disease control law, that is, by eliminating the disease of the virus mediator - wheat aphid to control the epidemic. However, the number of wheat aphids depends on a number of factors, and at the same time, the wheat aphids can migrate and land at high altitudes for long distances, which makes it difficult to predict and forecast the locality. Foreign use of virus purification, serum reaction methods such as newspaper, but must use electron microscopy. My country is currently