Windborne migration routes of newly-emerged fall armyworm from Qinling Mountains-Huaihe River region,China

• 作者: WU Qiu-lin SHEN Xiu-jing HE Li-mei JlANG Yu-ying LlU Jie HU Gao WU Kong-ming
• 来源期刊: 农业科学学报（英文）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: Section 2:Invasion and migration
• 页码范围: 694-706
• 页数: 13页
• 语种: 英文
• DOI: 10.1016/S2095-3119(20)63207-5

摘要

The fall armyworm (FAW,Lepidoptera: Noctuidae),Spodoptera frugiperda (J.E.Smith),invaded China in mid-December 2018; since then,it has become a great threat to Chinese agricultural production.Qinling Mountains-Huaihe River region (QM-HRR) is the transitional zone between northern and southern China,an important region for both corn and wheat production.Based on the actual occurrence of QM-HRR invaded by FAW in 2019,daily mean surface air temperature and nocturnal wind conditions at 925 hPa were examined,and migratory routes of FAW moths originated in QM-HRR were modeled by a forward-trajectory-analysis approach.The results indicated that migratory activities of FAW adults emerged in QM-HRR were initiated from late June.The moths from western QM-HRR,where has complex topographic terrain,mainly flied to Ningxia and Inner Mongolia before mid September.However,FAW moths from the eastern QM-HRR primarily engaged in high-altitude northward transport assisted by the prevailing southerly winds before mid August,and the North China Plain was identified as the main destination of FAW.Meanwhile,the migration trajectories of FAW moths had a possibility to reach the Northeast China Plain.From mid August,FAW moths in eastern QM-HRR largely migrated southward and returned to the Yangtze River Valley.This study provides detailed information on the occurrence and migration routes of FAW moths from QM-HRR and will be helpful for early warning and development of integrated pest management strategies for the control of this exotic insect pest.