辣椒疫霉病已成为当前辣椒生产中毁灭性病害，该病发病急，传播广，2—5天即可造成大面积死秧，使产量损失50％一80％，甚至无收。因此，识别该病症状和鉴别病原菌种类就成为综合防治的重要基础与前提。1材料和方法1．1材料供试辣椒疫霉病自然病样采自乌鲁木齐安宁渠发病因“四 Phytophthora capsici has become a devastating disease in the production of pepper currently. The disease is acute and spread widely. It can cause large-scale dead seedlings in 2-5 days, resulting in 50% to 80% loss of yield and even no yield. Therefore, identification of the disease symptoms and identification of pathogen species has become an important foundation and prerequisite for comprehensive prevention and treatment. 1 Materials and methods 1.1 Materials for test Phytophthora capsici natural disease samples taken from Urumqi Anningqu cause "four