Adzuki bean beetle, Callosobruchus chinensis, is a worldwide oligophagous and a field‐to‐storage pest of legumes including adzuki beans (Vigna angularis). Its over‐wintering stage is yet to be confirmed. A series of experiments was carried out at Jinju, in the southern part of the Republic of Korea, to elucidate the overwintering stages. Top‐ and sub‐soil samplings followed by pod and seed samplings from left over plants from adzuki bean fields in the winter of 2015, and an outdoor overwintering test (during Nov 2018 to Jun 2019) by exposing bean seeds harboring different stages (eggs, larvae, pupae, pharates and adults) of laboratory reared C. chinensis to the winter environment were carried out. None of the C. chinensis stages was detected from the top‐ and sub‐soil samples. When the pods and seeds from left over plants were sampled, only a few live pupae were obtained. In the outdoor test with laboratory reared C. chinensis, all the stages (larvae, pupae, and adults), except eggs, were detected on every other weekly samples of infested adzuki bean seeds throughout the winter. These results showed that the overwintering stages of C. chinensis in Jinju, southern Korea, are larvae, pupae, pharates and adults.

中文翻译：

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田间Callosobruchus chinensis（L.）的越冬阶段

小豆甲虫Callosobruchus chinensis是一种世界范围的寡食性植物，是豆类（包括小豆（Vigna angularis））的田间贮藏害虫。其越冬阶段尚待确认。在大韩民国南部的晋州进行了一系列实验，以阐明越冬阶段。在2015年冬季从顶土和地下土壤取样，然后从小豆田剩余植物的豆荚和种子取样，并通过暴露具有不同阶段（卵，进行了在冬季环境下饲养的中华C的幼虫，p，噬菌体和成虫。在没有菟丝子从表层和下层土壤样品中检测出阶段。从剩下的植物中提取豆荚和种子时，只获得了几只活p。在实验室饲养的中华小球藻的室外试验中，整个冬季，每隔一周一次侵染的红豆种子样品中均检测到除卵以外的所有阶段（幼虫，p和成虫）。这些结果表明，越冬阶段菟丝子在晋州，韩国南部，是幼虫，蛹，pharates和成人。