A description of temperature-dependent development to infer Hyphantria cunea (Lepidoptera: Erebidae) and its application to predict the species voltinism in China.

WenXuan Xu, Zhuang Zuo, XuDong Zhao, HongTing Zhao, Fei Teng, DeJun Hao
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Abstract

The fall webworm, Hyphantria cunea (Drury) (Lepidoptera, Erebidae) is a significant forest pest, known for its strong reproductive capacity and wide host range. Temperature plays a crucial role in its growth and development, influencing population dynamics. Global warming may alter its distribution, development timing, and control measures. We selected six temperatures (16 °C, 19 °C, 22 °C, 25 °C, 28 °C, and 31 °C) for rearing H. cunea in artificial climate chambers and recorded the duration of each developmental stage. Seven developmental rate models were used to fit the developmental progression of H. cunea. The results showed that temperature significantly affected the development time of H. cunea, as increasing temperature accelerated development, especially in the range of 16 °C to 28 °C. At 31 °C, the effect of temperature on the rate of development began to lessen. The fitting results based on the Lactin model showed that the lower threshold temperature (TL) of the development of H. cunea was 10 °C; the upper threshold temperature (TH) was 33.01 °C, and the optimal temperature (Topt) was 31.87 °C. The most effective accumulated temperature for completing the life cycle was 791.2 degree days. The calculation of annual accumulated degree days over the past five years showed that H. cunea in China normally has three generations per year, with a few colder regions supporting two generations annually. In exceptionally hot years, there may be a completely fourth generation.

中国棘球绦虫(鳞翅目:棘球绦虫科)的温度依赖发育描述及其在物种进化预测中的应用。
秋网虫(鳞翅目,Erebidae)是一种重要的森林害虫,以其强大的繁殖能力和广泛的寄主范围而闻名。温度对其生长发育起着至关重要的作用,影响着种群动态。全球变暖可能改变其分布、发展时间和控制措施。我们选择了6种温度(16°C、19°C、22°C、25°C、28°C和31°C)在人工气候室中饲养美洲红鳉,并记录了每个发育阶段的持续时间。采用7种发育速率模型拟合了中华圆蝽的发育进程。结果表明,温度显著影响红枣的发育时间,温度升高加速了红枣的发育,特别是在16 ~ 28℃范围内;在31℃时,温度对发育速度的影响开始减弱。基于Lactin模型的拟合结果表明,美洲木杉发育的下限温度(TL)为10℃;上限温度(TH)为33.01℃,最适温度(Topt)为31.87℃。完成生命周期的最有效积温为791.2℃。对近5年的年累积度日数计算表明,中国的H. cunea通常为3代/年,少数较冷地区为2代/年。在异常炎热的年份,可能会有整整第四代。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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