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自花椒流胶病病组织中分离得到３个疫霉菌株，致病性测定表明，３株疫霉对花椒（大红袍）致病性极强，对柑桔（蜜桔）不致病。根据其形态特征和生物学特性，并与柑桔褐腐疫霉标准菌株菌丝可溶性蛋白电泳图谱比较，这３株花椒流胶病病原疫霉为柑桔褐腐疫霉Ｐｈｙｔｏｐｈｔｈｏｒａｃｉｔｒｏｐｈｔｈｏｒａ（Ｓｍｉｔｈ＆Ｓｍｉｔｈ）Ｌｅｏｎｉａｎ。花椒ＺａｎｔｈｏｘｙｌａｍｂｕｎｇｅａｎｕｍＭａｘｉｍ为柑桔褐腐疫霉的寄主新记录。
Three Phytophthora capsici isolates were isolated from the pepper gum disease group, and the pathogenicity tests showed that the three Phytophthora capsici were highly pathogenic to Zanthoxylum bungeanum (Dahongpao) and did not cause disease to citrus (tangerine). According to their morphological characteristics and biological characteristics, and compared with the mycoplasma soluble protein electrophoresis pattern of Phytophthora pulcherrimus standard strains, Phytophthora cotrophthora Phytophthoracitrophthora (Smith & Smith) Leonian was identified as three Phytophthora capsici Phytophthoracitrophthora. Zanthoxylambungeanum Maxim was the new host of P. citri.