灵武农场近年春小麦蚜虫危害日趋普遍,不同程度导致小麦穗粒减少、千粒重下降而减产.据1979、80两年(黄叶病流行年份)八队调查,发病率为17.6%(个别达63.1%),有蚜株率34～80.2%,百株蚜量最高达7314头,穗粒减少18.6%,千粒重下降32.2%,减产49.6%.1979～1982年观察,麦蚜以二又蚜、长管蚜为主.4月中下旬在地边冰草中,常见二叉蚜有翅蚜 Lingwu farm in recent years, the growing risk of spring wheat aphids are becoming more common, varying degrees lead to reduced spikelets of wheat, grain weight decreased and reduced production.According to the 1979,80 two years (yellow leaf year) eight teams surveyed, the incidence was 17.6% (up to 63.1% ), The rate of aphids was 34 ~ 80.2%, the number of aphids was up to 7314, the number of spikelets was reduced by 18.6%, the weight of thousand seeds was decreased by 32.2% and the yield was reduced by 49.6%. From 1979 to 1982, Aphis dominated in late April in the grass on the ground, the common bifidouble aphids have winged aphids