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IMPACT OF ATMOSPHERIC LOW-FREQUENCY OSCILLATION ON THE IMMIGRATION OF NILAPARVATA LUGENS (ST?L) IN HUNAN AND JIANGXI PROVINCES
  Revised:March 15, 2018
KeyWords:atmospheric low-frequency oscillation  Nilaparvata lugens (St?l)  immigrating number  cycle of 10-20 days  atmospheric circulation
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Author NameAffiliationE-mail
SUN Si-si Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Agricultural Meteorology in Jiangsu Province, Nanjing University of Information Science & Technology, Nanjing 210044, China  
BAO Yun-xuan  baoyx@nuist.edu.cn, baoyunxuan@163. com 
ZHENG Teng-fei   
Lu Ming-hong   
Xie Xiao-jin   
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Abstract:
      Various features of the atmospheric environment affect the number of migratory insects, besides their initial population. However, little is known about the impact of atmospheric low-frequency oscillation (10 to 90 days) on insect migration. A case study was conducted to ascertain the influence of low-frequency atmospheric oscillation on the immigration of brown planthopper, Nilaparvata lugens (St?l), in Hunan and Jiangxi provinces. The results showed the following: (1) The number of immigrating N. lugens from April to June of 2007 through 2016 mainly exhibited a periodic oscillation of 10 to 20 days. (2) The 10-20 d low-frequency number of immigrating N. lugens was significantly correlated with a low-frequency wind field and a geopotential height field at 850 hPa. (3) During the peak phase of immigration, southwest or south winds served as a driving force and carried N. lugens populations northward, and when in the back of the trough and the front of the ridge, the downward airflow created a favorable condition for N. lugens to land in the study area. In conclusion, the northward migration of N. lugens was influenced by a low-frequency atmospheric circulation based on the analysis of dynamics. This study was the first research connecting atmospheric low-frequency oscillation to insect migration.
DOI:10.16555/j.1006-8775.2018.02.009
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