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记述了寄生于宁夏５４种经济植物上的霜霉菌５属，包括种或分化型３８个。并发现了香薷霜霉菌ＰｅｒｏｎｏｓｐｏｒａｅｌｓｈｏｌｔｚｉａｅＬｉｕｅｔＰａｉ（１９８５）的卵孢子阶段和５个国内新纪录种及分化型，即：紫苏霜霉菌Ｐｅｒ－ｏｎｏｓｐｏｒａｐｅｒｉｌａｅ、尤氐霜霉菌Ｐ．ｕｌｊａｎｉｓｈｃｈｅｖｉ、粉霜霉菌滨藜分化型Ｐ．ｆａｒｉｎｏｓａｆ．ｓｐ．ａｔｒｉｐｌｅｘ、寄生霜霉菌离子芥分化型Ｐａｒａｓｉｔｉｃａｆ．ｓｐ．ｃｈｏｒｉｓｐｏｒａｅ和寄生霜霉菌风花菜分化型Ｐ．ｐａｒａｓｉｔｉｃａｆ．ｓｐ．ｒｏｒｉｐｐａ。还报道了１１个国内寄主植物新记录。对香薷霜霉菌的卵孢子和５个国内新记录霜霉菌进行了形态、寄主症状和分布等描述，并附有形态图。讨论了粉霜霉和寄生霜霉种的分类问题。简述了重要经济植物霜霉病的危害情况
Five species of downy mildew parasitic on 54 economic plants in Ningxia were described, including 38 species or differentiated ones. And discovered the oospores stage of Peronospora elsholtziae LiuetPai (1985) and five new records and differentiation types in China, namely, Per-onospora period, Peronospora piroli. uljanishchevi, powdery mildew Atriplex differentiated P farinosaf. sp. atriplex, Parasitica f. parasiticus. sp. Chorisporae and parasitic downy mildew, Campylobacter. parasiticaf. sp. rorippa. Also reported 11 new records of domestic host plants. Morphology, host symptoms and distribution of the oocysts of the mold and the five newly recorded domestic molds were described with morphological maps. Discuss the classification of powdery mildew and parasitic downy mildew. Outlines the hazards of downy mildew in economically important plants