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Your Position :Home->Past Journals Catalog->2014年51 No.4

The formation of outbreak populations of the 3rd generation of Mythimna separata (Walker) in northernChina
Author of the article:PAN Lei1 WU Qiu-Lin1 CHEN Xiao1 JIANG Yu-Ying2 ZENG Juan2 ZHAI Bao-Ping1
Author's Workplace:1. Department of Entomology, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Disease and InsectPests, Ministry of Education, Ministry of Agriculture of China, Nanjing 210095, China; 2. National AgriculturalTechnical Extension and Service Center, Beijing 100125, China
Key Words:summer population of armyworm, outbreak mechanisms, trajectory analysis
Abstract:The structure and formation of outbreak populations of the 3rd generation armyworm remains unknown so identifying the source of this population is essential for effective forecasting and management. [Methods]  Synoptical radiosonde data were used to construct wind fields, and NOAA’s HYSPLIT to simulate the migration pathways and destinations of armyworm moths. [Results]  Although the 3rd generation armyworm population in northernChinawere composed of the migrants from the northwestern Provinces (10%),Inner Mongolia(7%) southwestern Provinces (6%), most (75%) were of local origin. Because of the pied piper effect, the contribution from northeasternChinato the outbreak population was only 0.2%. [Conclusion]  Outbreaks of 3rd generation armyworm in northernChinaare rare events. The widespread possible source populations and complex environmental factors greatly complicate the effective forecasting and control of such outbreaks. More empirical studies, case studies and theoretical research is needed to improve our understanding of the outbreak mechanisms of armyworm and forecasting and management to the pest.
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