1960年从3月中下旬开始,我区加兴、平湖、海宁、桐乡、吳兴、德淸等县蚕豆普遍发生赤斑病,且較严重,个别田蚕豆全坵枯死,顆粒无收。为进一步了解蚕豆赤斑病发生发展規律与气候、栽培、品种等关系和寻求有效的防治措施,本所特进行了蚕豆赤斑病的調查研究,結果如下。一、气候与发病的关系: 1960年,本区各地蚕豆赤斑病的发病特点是“早、快、重、广”。往年发病多在立夏以后,那时发病对蚕豆生产影响不大;而1960年在春分前后就严通发病。根据本所3月10日在加兴农学院农埸覌察,此时病害已普遍发生,至3月20日部分大田已严重成灾,下部叶片变黑逐漸枯萎脱落,并出現花腐等病状,比往年要提早1个半月左右。推究其原因,是 From mid to late 1960, from mid-to-late March of 1960, broad bean spot occurred in Jiaxing, Pinghu, Haining, Tongxiang, Wuxing and Detian counties, and more serious. In order to further understand the relationship between the occurrence and development of broad bean brown spot disease and climate, cultivation, variety and other effective measures to prevent and control, we conducted a special survey of broad bean red spot disease, the results are as follows. First, the relationship between climate and incidence: In 1960, the incidence of broad bean red spot around the region is characterized by “early, fast, heavy and wide.” In recent years the incidence of more in the beginning of the summer, when the incidence of broad bean production has little effect; and in 1960 before and after the spring break on Yan pass. According to the Institute March 10 at Gap Hing College of Agriculture 埸 覌 inspection, when the disease has been widespread, to March 20 some fields have been seriously disastrous, the lower part of the leaves turn black gradually wilt off, and the emergence of flowers and other symptoms , One and a half months earlier than in previous years. Reason for this is