The annual bluegrass weevil Listronotus maculicollis requires chilling exposure to terminate reproductive diapause during overwintering, but the effects of temperature on its post-diapause development in spring remain unclear. To explore this effect, overwintering adults were transferred from cold conditions (6°C/4°C, L:D 10:14) to different warm-up temperatures at L:D 12:12. When weevils were transferred to 7, 14 and 21°C in December and late January, the sizes of male and female reproductive organs were significantly smaller at 7°C than at 14 and 21°C. When weevils were transferred to 7, 9, 11, 13 and 15°C in late January, higher temperatures facilitated the post-diapause development. In both sexes, the sizes of reproductive organs and developmental rate increased with temperature. Reproductive organs did not grow significantly at 7°C in males and at 7–9°C in females, at which the percentage of developing weevils remained low. The time required for 50% of individuals to resume development was 44, 18, 13 and 8 days at 9, 11, 13 and 15°C, respectively, in males and 19, 14 and 8 days at 11, 13 and 15°C, respectively, in females. The threshold temperature for post-diapause development was 7.8°C in males, based on which 61.7 degree-days coincided with 50% of individuals developing. Under field conditions, the percentage of male and female maturity and insemination rate were low until early March, but all reached 100% by late March.

中文翻译：

---

温度对 Listronotus maculicollis（鞘翅目：curculionidae）滞育后生殖发育的影响

一年一度的蓝草象鼻虫斑蝽在越冬期间需要低温暴露以终止生殖滞育，但温度对其春季滞育后发育的影响仍不清楚。为了探索这种影响，越冬成虫从寒冷条件（6°C/4°C，L:D 10:14）转移到 L:D 12:12 的不同预热温度。当象鼻虫在 12 月和 1 月下旬转移到 7、14 和 21°C 时，在 7°C 时雄性和雌性生殖器官的大小明显小于在 14 和 21°C 时的大小。当象鼻虫在 1 月下旬转移到 7、9、11、13 和 15°C 时，较高的温度促进了滞育后的发育。在两性中，生殖器官的大小和发育速度都随着温度的升高而增加。男性生殖器官在 7°C 和女性在 7-9°C 时没有显着生长，在此情况下，发展中的象鼻虫的百分比仍然很低。在男性中，50% 的个体恢复发育所需的时间分别为 9、11、13 和 15°C 下 44、18、13 和 8 天，而 11、13 和 15°C 下分别为 19、14 和 8 天，分别在女性中。男性滞育后发育的阈值温度为 7.8°C，基于此，61.7 度日与 50% 的个体发育一致。田间条件下，雌雄成熟百分率和授精率在3月初之前一直很低，但到3月下旬都达到了100%。男性滞育后发育的阈值温度为 7.8°C，基于此，61.7 度日与 50% 的个体发育一致。田间条件下，雌雄成熟百分率和授精率在3月初之前一直很低，但到3月下旬都达到了100%。男性滞育后发育的阈值温度为 7.8°C，基于此，61.7 度日与 50% 的个体发育一致。田间条件下，雌雄成熟百分率和授精率在3月初之前一直很低，但到3月下旬都达到了100%。