Laboratory-based flight performance of the fall armyworm, Spodoptera frugiperda

doi:10.1016/S2095-3119(20)63166-5

摘要/Abstract

摘要：

草地贪夜蛾2018年底从缅甸侵入中国后，迅速迁飞扩散到中国的大部分地区和多个东亚国家。我们利用昆虫飞行磨室内测定了草地贪夜蛾在不同温度和湿度条件下的飞行参数，结果显示草地贪夜蛾在20℃-25℃和60%-90%相对湿度下具有最强的飞行能力。在此最佳飞行环境条件下，连续吊飞测试5个夜晚（每个夜晚10 h），草地贪夜蛾平均自主飞行距离、飞行时间和飞行速度分别为63.73 (48.42-94.12) km、24.12 (20.87-27.73) h 和2.73 (2.13-3.33) km h^-1，表明草地贪夜蛾具有很大的飞行潜力并可进行不同夜晚的连续飞行。该研究结果为深入分析草地贪夜蛾的迁飞模式和迁飞轨迹提供了科学依据，有助于提高草地贪夜蛾迁飞活动的测报水平。

Abstract:

In late 2018, the fall armyworm (FAW) Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) made its arrival in China and its populations have since proliferated across most of eastern Asia. While S. frugiperda exhibits a considerable dispersal capacity and engages in long-distance migration, there’s only scant information on the species’ flight capability. Here, we empirically assessed S. frugiperda flight activity under varying climatic conditions using a flight mill. More specifically, under laboratory conditions, FAW exhibited superior flight performance at 20–25°C and 60–90% relative humidity (RH). When quantifying flight performance over five consecutive nights (i.e., 10 h/night), all flight parameters initially increased and then gradually dropped and FAW adults attained a total flight distance, duration and velocity equal to 63.73 km (48.42–94.12 km) (median, quartile range), 24.12 h (20.87–27.73 h) and 2.73 km h^–1 (2.13–3.33 km h^–1), respectively. Our work constitutes a first comprehensive assessment of S. frugiperda flight performance and provides baseline information for future efforts to forecast spatiotemporal changes in its geographical distribution, movement patterns and invasion trajectories. Such can ultimately permit a timely and targeted deployment of area-wide pest management measures against this newly-invasive pest in China and across eastern Asia.

Key words: aerobiology , flight mill , flight capacity , migration , invasion biology , movement ecology

. [J]. Journal of Integrative Agriculture, 2021, 20(3): 707-714.

GE Shi-shuai, HE Li-mei, HE Wei, YAN Ran, Kris A. G. WYCKHUYS, WU Kong-ming . Laboratory-based flight performance of the fall armyworm, Spodoptera frugiperda[J]. Journal of Integrative Agriculture, 2021, 20(3): 707-714.

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