60年代初,乌鲁木齐地区始出现辣椒盛花初果期死亡的现象.80年代以来,此病逐年加重,1985年扩展到昌吉、石河子、伊犁、阿勒泰等地区,发病率逐年上升.1986年,乌鲁木齐地区辣椒病死率达40%左右,1987年达80%以上.1987年,昌吉州辣椒发病面积1万余亩,菜农经济损失巨大.1985年以来,我们进行了田间调查和室内研究,先后从乌鲁木齐、昌吉、阜康、石河子等地采集病株200余株,从90%以上的病株上分离出疫霉病菌,初步确认辣椒在盛花初果期死亡的主要原因是疫霉属病菌(Phy-tophthora sp.)侵染,故暂定为辣椒疫霉病.有些辣椒植株死亡也可能是由于其他病菌侵染或栽培环境恶劣所致.现将研究结果 In the early 1960s, the beginning of the death of pepper flower in Urumqi began to appear.After the 1980s, the disease has been increasing year by year, and it was expanded to Changji, Shihezi, Ili and Altay etc. in 1985.In 1986, Urumqi area Pepper mortality rate of about 40%, up to 80% in 1987. In 1987, changji chili incidence area of ​​more than 1 acres, vegetable farmers huge economic losses .1985, we conducted a field survey and indoor research, successively from Urumqi, Changji, Fukang, Shihezi and other places collected more than 200 diseased plants, isolates of Phytophthora capsici were isolated from more than 90% of the diseased plants. The main reason for the initial death of peppers in the early fruiting period was Phy-tophthora sp.) infection, it is tentatively identified as Phytophthora capsici. Some pepper plant death may also be due to other pathogen infection or cultivation caused by harsh environment now study results