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Insect abundance over Chinese rice fields in relation to environmental parameters, studied with a polarization-sensitive CW near-IR lidar system

Author:
  • Shiming Zhu
  • Elin Malmqvist
  • Wansha Li
  • Samuel Jansson
  • Yiyun Li
  • Zheng Duan
  • Katarina Svanberg
  • Hongqiang Feng
  • Ziwei Song
  • Guangyu Zhao
  • Mikkel Brydegaard
  • Sune Svanberg
Publishing year: 2017-07-01
Language: English
Publication/Series: Applied Physics B: Lasers and Optics
Volume: 123
Issue: 7
Document type: Journal article
Publisher: Springer

Abstract english

Effective monitoring of flying insects is of major societal importance in view of the role of insects as indispensable pollinators, destructive disease vectors and economically devastating agricultural pests. The present paper reports on monitoring of flying agricultural pests using a continuous-wave lidar system in a rice-field location in Southern China. Using a Scheimpflug arrangement, range resolution over several 100 m long observational paths was achieved. The system operates with two perpendicularly polarized near-infrared lasers, which are activated intermittently, and back-scattered radiation from insects was recorded by a linear array detector placed after a linear polarizer. Our polarization sensitive system was used to monitor the flying insect diurnal activity and also the influence of changes in weather conditions, e.g., the occurrence of rain. Activity strongly peaked at dusk and rose again, although to a lower extent, just before dawn. At the onset of rainfall, a strong increase in insect counts occurred which was interpreted as the rain-induced bringing down of high-altitude migrant insects.

Keywords

  • Atom and Molecular Physics and Optics
  • Environmental Sciences related to Agriculture and Land-use

Other

Published
  • ISSN: 0946-2171
Mikkel Brygdegaard
E-mail: mikkel [dot] brydegaard [at] forbrf [dot] lth [dot] se

Associate senior lecturer

Combustion Physics

+46 46 222 76 57

E424

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Centre for Animal Movement Research
Evolutionary Ecology, Department of Biology
Ecology building S-223 62 Lund Sweden