棉花“茎腐病”这一中文名称早已被人引用,但病原菌却不相同。戴芳澜等(1958)记载棉属(Gossypium SP.) “茎腐病”病原为Macrophominaphaseoli(Maubl.)Ashby;沈其益(1937)、杨演等(1942)记载棉花“茎腐病”病原为Sclerotium rclfsii。我们于1974年7月上旬在西安市郊区数处棉田内看到由Phoma SP.引起的一种棉花茎腐病,就致病病原而言可能与Elliott.J.A.。(1921)报导的一致。在国内,此病尚无报导。鉴于此病为害甚烈,现将初步观察结果简报如下,供各地参考。 (一)田间发病情况:此病在高湿条件下扩展蔓延很快。7月3日凌晨雷阵雨后,当 Cotton “stalk rot” the Chinese name has long been quoted, but the pathogen is not the same. Dai Fanglan et al. (1958) reported that the pathogen of “stem rot” of Gossypium sp. Was Macrophominaphaseoli (Maubl.) Ashby. Shen Qiyi (1937) and Yang Yan et al. (1942) reported that the pathogen of cotton stalk rot was Sclerotium rclfsii. We saw a cotton stalk rot caused by Phoma SP. In several cotton fields on the outskirts of Xi’an in early July 1974, possibly related to Elliott. J.A. (1921) reported the same. In China, there is no report of this disease. In view of the disease is very harmful, the preliminary observations are now presented below for reference. (A) the incidence of the field: the disease spread under the conditions of high humidity spread rapidly. After the thunderstorm on July 3, when