Scientia Agricultura Sinica ›› 2012, Vol. 45 ›› Issue (23): 4808-4817.doi: 10.3864/j.issn.0578-1752.2012.23.007

• PLANT PROTECTION • Previous Articles     Next Articles

A Case Study of Radar Observation of the Rice Leaf Folder (Cnaphalocrocis medinalis Guenée) Migration in Southern China

 JIANG  Chun-Xian, YANG  Xiu-Li, QI  Hui-Hui, ZHANG  Yun-Hui, CHENG  Deng-Fa   

  1. 1.State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193; 2.College of Agronomy, Sichuan Agricultural University, Chengdu 611130
  • Received:2012-04-01 Online:2012-12-01 Published:2012-08-27

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Abstract: 【Objective】The objective of this study is to research on the flight parameters of rice leaf folder (Cnaphalocrocis medinalis Guenée) in southern China, and to provide a basis for effective prevention and control of this pest. 【Method】 The flight parameters of C. medinalis moth were studied by using a millimetric scanning entomology radar and related equipments. The spatio-temporal distribution of landing areas of emigration population was analyzed using HYSPLIT, a software package that simulates migration trajectories. 【Result】 C. medinalis started take-off after sunset, reached the take-off peak at about 20：00, take-off sustained about 1 h. C. medinalis moth generally flew below 1 000 m. It accumulated and formed 2-3-layer dense layers when flew. The insect layer with large density at 100-300 m and 400-500 m could observe every night. The insect layer was coincide closely with partial maximum wind speed and was not conincide with wind direction. However, the biggest density was not always at the height of biggest wind speed. Trajectory analysis showed that the population emmigrating from Xing’an could arrive and survive at Hechi in Guangxi. Because of no suitable rice, the population arriving at Zunyi and Qiannan in Guizhou couldn’t survive. 【Conclusion】 The flight parameters of C. medinalis in southern China were different from those in eastern China.

Key words: rice leaf folder (Cnaphalocrocis medinalis Guenée), millimetric scanning entomology radar, radar observation, flight parameters, trajectory analysis

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