通过对采自我国内蒙古丰镇县13个春小麦病株标样进行4种蚜虫连续传毒比较,不同温度饲毒和接种试验,薄膜饲毒,2种蚜虫成若蚜传毒比较和血清学酶标试验等,明确我国内蒙古丰镇县小麦黄矮病毒株系为由麦二叉蚜和麦长管蚜有效传播的麦二叉蚜麦长管蚜株系(GAV)。对于这个株系,禾缢管蚜与玉米蚜是不能传播的。这种株系在我国冬麦区春麦区都有分布。 By comparing the continuous transmission of four kinds of aphids collected from 13 spring wheat strains in Fengzhen County of Inner Mongolia of our country, different temperature feeding and inoculation test, film feeding, comparison of two kinds of aphids and the activity of serological enzyme Standard test and so on, it is clear that wheat yellow dwarf virus strain in Fengzhen County, Inner Mongolia, China, is a wheat aphid wheat aphid line (GAV) which is effectively transmitted by wheat aphid and wheat aphid. For this line, Aphis gracilis and Aphis gossypii are not able to spread. This line in China’s winter wheat area are distributed in spring wheat.