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Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
Sponsored by:Chinese Society of Entomological;institute of zoology, chinese academy of sciences;
Address:Chaoyang District No. 1 Beichen West Road, No. 5 hospital,Beijing City,100101, China
Your Position :Home->Past Journals Catalog->2018年55 No.2

The autumn migration of the third generation armyworm Mythimna separata (Walker): Radar observations and trajectory analysis
Author of the article:SUN Wei1** CHENG Zhi-Jia2 GAO Yue-Bo1*** SU Qian-Fu1 ZHOU Jia-Chun1 WANG Jin-Sheng3 ZHANG Jia
Author's Workplace:1. Key Laboratory of Integrated Pest Management on Crops in Northeast, Ministry of Agriculture, Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, China; 2. College of Agronomy, Jilin Agricultural University, Changchun 130118, China; 3. College of Life Science and Technology, Harbin Normal University, Harbin 150080, China
Key Words: scanning entomological radar, third-generation armyworm, trajectory analysis

 [Objectives]  Radar observations were carried out in Gongzhuling, Jilin Province of China in 2015 to confirm the migration dynamics of the third-generation of the armyworm, Mythimna separata, and to analyze the probability of their southward migration. The results provide a scientific basis for forecasting and management of this pest. [Methods]  The migration of third-generation armyworms was investigated based on scanning entomological radar observations, field rearing, field survey trap monitoring and trajectory analysis. [Results]  1. 3rd generation armyworm moths can reproduce successfully but larval development is delayed. 2. 10.3 times more third generation adults were trapped than first generation adults, and most 3rd generation moths had undeveloped and unmated ovaries suggesting that they were emigrating from local habitats. 3. Wind direction was basically south, southeast and southwest rather than northeast, which prevented 3rd generation moths from returning to overwintering regions in southern China. 4. Aerial stratification was observed over three days. Trajectory analysis indicated that most landing areas were restricted to either north of Gongzhuling or North Korea. [Conclusion]  Prevailing southerlies in 2015 prevented local third-generation moths from migrating to overwintering regions. The Pied piper effect made these emigrants incapable of forming a source population of armyworms the following summer.

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