小麦黄矮病(BYDV)是由麦蚜传播的一种流行性病毒病害。1951年美国首次发现报道;我国于1960年第一次大流行,以后每年都有不同程度的发生。我省自1966年有记载以来,中度以上的流行也发生了5次(1966、1970、1971、1973、1978年),每次都使小麦产量损失20—30%。除降低成穗率和穗粒数外,常使粒重降低6.4—16.4%,最高达31.9—36%。据本所对黄矮 Wheat yellow dwarf disease (BYDV) is a pandemic virus disease transmitted by wheat aphids. The first discovery in the United States was reported in 1951; the first pandemic was reported in China in 1960, and it has taken place to varying degrees every year since. Since the province recorded in 1966, the epidemics of moderate to moderate occurred five times (1966, 1970, 1971, 1973 and 1978), each of which caused a 20-30% loss of wheat output. In addition to reducing the rate of panicles and grains per spike, grain weight is often reduced by 6.4-16.4% and up to 31.9-36%. According to the firm on the yellow dwarf