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Radar observations of the seasonal migration of brown planthopper (Nilaparvata lugens Stål) in Southern China

Published online by Cambridge University Press:  17 September 2014

H. Qi ,
C. Jiang ,
Y. Zhang ,
X. Yang  and
D. Cheng
H. Qi
Affiliation:
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
C. Jiang
Affiliation:
College of Agronomy, Sichuan Agricultural University, Chengdu 611130, Sichuan Province, China
Y. Zhang
Affiliation:
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
X. Yang
Affiliation:
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
D. Cheng*
Affiliation:
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
*
*Author for correspondence Phone: +86 13661036036 Fax: +86 10 62815935 E-mail: [email protected]
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Abstract

The summer and autumn migrations of the brown planthopper (Nilaparvata lugens) were observed in Southern China with a millimetric scanning entomological radar and a searchlight trap supplemented with capture in field cages, field surveys, and dissections of females. Nilaparvata lugens took off at dusk and dawn in summer, but in autumn there was sometimes only a dusk take-off. The variation of the area density of the radar targets indicated that flight durations were about 9–10 h. In summer, planthopper-size targets generally flew below 1800 m above ground level (AGL), although some insects reached 2000 m AGL; in autumn, they flew lower, generally below 1100 m although some insects reached 1700 m AGL. Multiple layer concentrations were seen every night in both summer and autumn. The depths of these layers in autumn were less than in summer. Nilaparvata lugens flew in strong winds; wind shear may be the main factor causing them to accumulate and form dense layers at certain heights. Nilaparvata lugens emigrating in summer from the vicinity of the radar site in the Northeastern Guangxi Zhuang Autonomous Region, and carried by the prevailing southwesterly wind, would have travelled northeastwards and reached Northern Hunan Province. In autumn, with the prevailing northeasterly wind, emigrants would have reached overwintering areas (south of 21°N).

Keywords

Nilaparvata lugens Stålmillimetric scanning entomological radarflight behaviourseasonal migrationSouthern China
Type
Research Papers
Information
Bulletin of Entomological Research , Volume 104 , Issue 6 , December 2014 , pp. 731 - 741
Copyright
Copyright © Cambridge University Press 2014 

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