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Min Zhu,Song, Yoo-Han,Uhm, Ki-Baek,Richard W. Turner,Lee, Hoon-Ho,George K. Roderick Korean Society of Applied Entomology 2000 Journal of Asia-Pacific Entomology Vol.3 No.1
Brown planthopper (nilaparvata Lugens) is a migrant pest which can migrate from tropical area into subtropical and temperate area every year and caused a lot of damage in rice production. To understand the migration process of this pest, the Boundary Layer Atmospheric(BLAYER) model and Geographic Information System(GIS) were used to analyze the migration waves from June to July in 1997, 1998 and 1999 in South Korea. The simulation results showed: 1) Each migration wave had different mass distribution and immigration area at different time; 2) The vertical air current value distributed in BPH taking-off and landing area was about several centimeters per second, which is lower than BPH flight ability. 3) The trajectory route showed that BPH had different migration routes emigrated from different source areas according to the weather system. The main source of BPH immigrated in South Korea was from the East part of Guangdong Province and South East part of Fujian Province, Perple's Republic of China. 4) Comparing with the different migration heights (733m, 1,348m and 1,963m above ground level), BPH mass distributed more northwestward in low height than in high height. 5) BPH mass movement also gave another evidence to identify the light trap data in late July.