The tortoise beetle, Laccoptera nepalensis Boheman (Coleoptera: Chrysomelidae), is an important insect pest of the sweet potato, and is naturally distributed in southern to eastern Asia. The species has recently been expanding its range to the main islands of Japan, where it had previously not been distributed. In this study, the life-history traits of a local population in southern Kyushu, Japan were examined. The adults showed a long-day photoperiodic response at 20 and 25 °C with critical photophases of 13.97 and 12.52 h/day, respectively: female adults reared under long-day conditions laid eggs, whereas those reared under short-day conditions did not and entered diapause. When adults that had been reared under 16L–8D at 20 °C were transferred to 12L–12D at 20 °C, they ceased laying eggs. These results, together with the developmental threshold temperature and thermal constant obtained for each stage, suggest that the beetle overwinters in the adult stage in a state of diapause and produces a maximum of three generations per year in southern Kyushu.

乌龟甲虫尼泊尔Boheman（鞘翅目：葫芦科），是甘薯的重要害虫，自然分布于亚洲南部至东部。该物种最近将其范围扩大到日本的主要岛屿，以前从未在此分发过。在这项研究中，研究了日本九州南部的当地居民的生活史特征。成年动物在20和25°C下表现出长期的光周期反应，临界光相分别为13.97和12.52 h / day：在长日条件下饲养的成年女性产卵，而在短日条件下饲养的成年女性则不产卵。进入了滞育状态。当在20°C下在16L–8D下饲养的成年动物转移到20°C下的12L–12D时，他们停止产卵。这些结果，