雪霉病在四川雅安青衣江流域六十年代就有发生和为害,当时未引起重视。1978年在名山、雅安、天全、芦山等县造成死苗3万余亩,以后为害趋势逐年加剧,于是,地区测报站从1978年开始进行室内外研究。经过菌种分离培养,接种观察,鉴定为小麦雪霉病。据1980年初步调查,沿青衣江流域各县,发病面积达15万亩左右。小麦品种繁六发病后,千粒重减少6.4克,产量降低21.84％,重病田块达三分之一。 Snow mildew in Ya’an, Sichuan Tsing Yi River basin occurred in the sixties and damage, did not pay attention. In 1978, there were more than 30,000 mu of dead seedlings in Mingshan, Ya’an, Tianquan and Lushan counties. Afterwards, the trend of harm intensified year by year. Therefore, the regional measuring station started to study indoor and outdoor from 1978. After strain culture, inoculation observation, identified as wheat snow mildew. According to a preliminary survey conducted in 1980, the incidence of the disease reached about 150,000 mu along the counties of the Qingyi River. After the occurrence of many varieties of wheat six, 1000 grain weight decreased by 6.4 grams, yield decreased 21.84%, one third of serious disease block.