马铃薯晚疫病菌很难分离裴养并得到纯菌株 ,本文根据作者近 8年的工作经验总结出了马铃薯晚疫病菌的一般研究方法 ,主要内容包括马铃薯晚疫病菌的症状识别 ,马铃薯晚疫病标样的采集方法 ,马铃薯晚疫病菌的分离纯化方法 ,马铃薯晚疫病菌的形态鉴定 ,马铃薯品种对晚疫病的抗病性评价方法等 Phytophthora infestans is difficult to isolate and obtain pure strains. According to the author’s nearly 8 years’ experience, this paper summarized the general research methods of P. infestans, including the identification of potato late blight, the late blight of potato Like collection method, isolation and purification of Phytophthora infestans, morphological identification of Phytophthora infestans, evaluation of disease resistance of late blight by potato varieties, etc.