1、引言:小麦梭斑花叶病是我省一个新的小麦土传病毒病害,1962年在天全县始阳公社个别麦田零星发生,1974年扩大到800多亩,一般减产50％左右,重则要改种洋芋或玉米。1975年天全县普查,就有十几个公社零星发生,随后汉源县的马托及宜东两个公社也有发现,几乎沿青衣江、大渡河流域都有此病局部发生。为了达到及早控制防 1, Introduction: Wheat spindle mosaic disease is a new wheat soil-borne virus disease in our province. In 1962, some wheat fields in Shiyang Commune of Tianquan County sporadically occurred. In 1974, it expanded to more than 800 mu, which was about 50% Replaced by potato or corn. There was a dozen communes in sporadic census in Tianquan County in 1975, followed by the discovery of two communes in Matuo and Yidong in Hanyuan County. Almost along the Qingyi River and Dadu River valleys, the disease occurred locally. In order to achieve early control of defense