小麦蚜虫,黄矮病在我县历史上就有发生,但未成灾。六十年代以来,随着冬小麦面积的扩大而日趋严重,成为我县流行严重的病虫害。由蚜虫传毒而引起的小麦黄矮病,对小麦生产是一个严重的威胁。近十年来,小麦黄矮病流行的年份就有三次。发病率1975年为83.4％,1979年13.43％,1981年15％。这三次大流行使全县损失小麦达6000多万斤。在小麦整个生育过程中,任何阶段都可感病,感病后株型矮化丛生,由叶尖端向下发黄,籽粒秕瘦,严重时整株死亡,减产可达15—90％。 Wheat aphids, yellow dwarf disease in my county history has occurred, but not disaster. Since the 1960s, as the area of ​​winter wheat has expanded, it has become a serious epidemic pest in our county. Wheat yellow dwarf virus, caused by aphids, is a serious threat to wheat production. In the last decade, there have been three prevalence years of wheat yellow dwarf virus. The incidence rate was 83.4% in 1975, 13.43% in 1979 and 15% in 1981. The three pandemic made the county lose more than 6,000 kilos of wheat. In wheat throughout the growing process, at any stage can be susceptible, after the disease plant dwarf disease clusters from the tip of the yellow hair down, lean grains, severe death of the whole plant, cut up to 15-90%.