小麦黄矮病目前已遍及我国西北、华北、东北等十几个省区,近几年来先后曾5次大流行,病田一般减产30%左右,有的高达60%,严重的地块甚至颗粒不收,造成很大损失,成为当前急待消灭的小麦重要病害之一。我区过去发生很轻,1964年我们曾进行过调查,在卓资县 Wheat yellow dwarf virus has spread to more than 10 provinces and autonomous regions in Northwest China, North China and Northeast China. In recent years, it has hit 5 epidemics in a row. The general reduction of disease fields is about 30%, and some as high as 60% Do not accept, causing great losses, becoming one of the most important diseases to be eliminated at present. My district occurred in the past very light, in 1964 we conducted a survey in Zhuozi county