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近年在华北地区普遍发生棉铃疫病和蓖麻叶果疫病。对于这两种疫病菌的形态和生理特性,按标准方法分剧进行了详细观察。把棉铃疫病菌鉴定为Phytophthora boehmeriae Sawada 的一个株系,并对它的寄主范围作了补充,在温度关系和有性生殖习性上它不同于已往西印度报导的棉铃上的 P.palmivoraBulter 和 P.parasitica Dastur。蓖麻疫病菌的性状与印度的典型 P.parasiticaDastur 相符合,与泽田兼吉在台湾描述的 P.ricini Sawada 和 P.formosanaSawada 两个新种只在寄主范围和孢子囊长宽比倒上稍有差异。
In recent years, cotton boll blight and castor leaves fruit blight are common in North China. For the morphology and physiological characteristics of the two Phytophthora, according to the standard method of drama were observed in detail. P. aureus was identified as a strain of Phytophthora boehmeriae Sawada and was complemented by its host range which differs from P. palmivora Bulter and P. in cotton bolls reported in West India in terms of temperature dependence and sexual reproduction habits. parasitica Dastur. The properties of the virus against Borrelia are in line with the typical P. parasitica Dastur from India, and two new species, P.ricini Sawada and P.formosana Sawada, described by Sawada and Katsuzawa in Taiwan, fell only slightly between the host range and the length to width ratio of the sporocysts difference.