甘薯天蛾又名旋花天蛾,是一种间歇性发生的害虫。此虫分布甚广,从南到北,几乎所有甘薯产区都有发生,其中以长江流域各省为害较重。8月份是第三代幼虫为害盛期,常将薯叶吃光,因此时正值薯块膨大期,对产量影响很 Sweet potato moth, also known as Convolvulus, is a pest that occurs intermittently. This worm is widely distributed, from south to north, almost all sweet potato producing areas have occurred, of which the more serious damage to the provinces of the Yangtze River Basin. August is the third generation of larvae infested, often eat potato leaves, so when the volume of tubers is expanding, the impact on the yield is very