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Numerical model simulations of brown planthopper Nilaparvata lugens and white-backed planthopper Sogatella furcifera migration



Numerical model simulations of brown planthopper Nilaparvata lugens and white-backed planthopper Sogatella furcifera migration



Bulletin of Entomological Research 89(6): 557-568



This paper reports on the performance of an atmospheric numerical model called BLAYER which has been adapted to forecast the movement of migrant brown planthopper Nilaparvata lugens (Stal) and white-backed planthopper Sogatella furcifera (Horvarth) populations from China to Korea. Comparison of model forecasts with trapping data for the 1987 and 1988 migration seasons indicated: (i) that the model is capable of successfully simulating the movement of planthoppers to Korea; (ii) that the model has sufficient detail to simulate insect movement into different regions of Korea; (iii) the source region for early season migrants is most likely to be south-eastern China (i.e. south of 25degreeN and east of 115degreeE); (iv) later season migrants may not necessarily always originate from an expanded northward region (south of 30degreeN); (v) the flight level of migrants may vary from about 500 to 2000 m altitude from one migration episode to another; and (vi) flight times ranging between 24 and 45 h are required to explain the migratory influxes. The results reported here have led to BLAYER forecasts of planthopper migration being produced on an operational basis within Korea.

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Accession: 035414082

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