旋花天蛾Herse convolvuli Linnaeus为甘薯上重要害虫,六十年代以来,常给淮北地区甘薯生产上带来不同程度的损失。关于其幼期形态变化及生活习性方面,国內报道的不多,为了正确掌握幼期各阶段形态特点,进一步摸清其发生规律,1963年以来(十年浩劫期间中辍)我们在安徽省淮北、江淮之间和沿江地区,曾断续对此虫进行了室内饲养观察和田间调查,现将结果整理如下: Herse convolvuli Linnaeus is an important pest on sweet potato. Since the 1960s, the sweet potato production in Huaibei often caused different degrees of loss. About its early morphological changes and living habits, there are not many reports in the country. In order to correctly grasp the morphological features at various stages in the early stages and further clarify the law of its occurrence, since 1963 (during the ten-year calamity) , Jianghuai and along the Yangtze River area, had conducted intermittent indoor insects observed and field surveys, the results are summarized as follows: