Brown marmorated stink bug, Halyomorpha halys (Stål), is an invasive pest of Asian origin first detected in North Carolina in 2009. By 2015, it became an important pest in the mountain and Piedmont regions, but its population densities have remained low in the eastern plains regions. Starting with a cohort of diapausing adults in January of 2018 and 2019, semi-field cage studies were used to document the phenology and reproductive capacity of H. halys through October of each year at Mills River (mountains) and Goldsboro (Southeastern Plains) sites, which have the same photoperiod, but different temperature profiles. Halyomorpha halys was univoltine in the cooler mountain site, but bivoltine in the warmer plains site, leading to earlier emergence from overwintering diapause, greater heat unit accumulations, and a F1 adult generation that emerged before on-set of diapause-inducing conditions, which allowed for an F2 generation. However, only 17.2% of ovipositing F1 females laid egg masses that hatched, compared to > 90% of overwintered females. Poor establishment of H. halys in the plains versus mountains was attributed to heat stress that contributed to a higher percentage of overwintered adults that emerged early and did not oviposit, a truncated oviposition pattern by overwintered adults, and poor F2 egg hatch. Quadratic equations fit relationships between cumulative degree-days from biofix and proportional oviposition and adult eclosion of respective generations. Utility of the phenology model on a wider scale will depend on how well H. halys populations in other areas conform to North Carolina population’s response to photoperiod and temperature.

褐斑蝽，Halyomorpha halys (Stål)，是一种起源于亚洲的入侵性害虫，于 2009 年在北卡罗来纳州首次发现。到 2015 年，它成为山区和皮埃蒙特地区的重要害虫，但其种群密度一直保持在低水平。东部平原地区。从 2018 年 1 月和 2019 年 1 月的一组滞育成虫开始，半田间网箱研究用于记录每年 10 月在米尔斯河（山区）和戈尔兹伯勒（东南平原）地点的H. halys的物候和繁殖能力，它们具有相同的光周期，但温度分布不同。海藻在较冷的山区是单化的，但在温暖的平原地区是二化的，导致越冬滞育更早出现，更多的热量积累，以及在滞育诱导条件开始之前出现的 F1 成虫一代，这使得F2代。然而，只有 17.2% 的产卵 F1 雌性产下孵化的卵块，而越冬雌性的产卵率超过 90%。H. halys的不良建立平原与山区的差异归因于热应激，导致越冬成虫早期出现且不产卵的比例较高，越冬成虫的产卵模式被截断，以及 F2 卵孵化率低。二次方程拟合来自 biofix 的累积度日与各代成比例产卵和成虫羽化之间的关系。物候模型在更广泛范围内的效用将取决于其他地区的H. halys种群与北卡罗来纳州种群对光周期和温度的反应的符合程度。