Multiscale analyses on a massive immigration process of Sogatella furcifera (Horváth) in south-central China: influences of synoptic-scale meteorological conditions and topography

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Wu, Q.-L., Westbrook, J. K., Hu, G., Lu, M-H., Liu, W-C., Sword, G. A. and Zhai, B-P. 2018. Multiscale analyses on a massive immigration process of Sogatella furcifera (Horváth) in south-central China: influences of synoptic-scale meteorological conditions and topography. International Journal Of Biometeorology. 62 (8), pp. 1389-1406.

AuthorsWu, Q.-L., Westbrook, J. K., Hu, G., Lu, M-H., Liu, W-C., Sword, G. A. and Zhai, B-P.
Abstract

Mass landings of migrating white-backed planthopper, Sogatella furcifera (Horváth), can lead to severe outbreaks that cause heavy losses for rice production in East Asia. South-central China is the main infestation area on the annual migration loop of S. furcifera between the northern Indo-China Peninsula and mainland China; however, rice planthopper species are not able to survive in this region over winter. In this study, a trajectory analysis of movements from population source areas and a spatiotemporal dynamic analysis of mesoscale and synoptic weather conditions from 7 to 10 May 2012 were conducted using the weather research and forecasting (WRF) model to identify source areas of immigrants and determine how weather and topographic terrain influence insect landing. A sensitivity experiment was conducted with reduced topography using the WRF model to explain the associations among rainfall, topography, and light-trap catches of S. furcifera. The trajectory modeling results suggest that the source areas of S. furcifera immigrants into south-central China from 8 to 10 May were mainly southern Guangxi, northern Vietnam, and north-central Vietnam. The appearance of enormous catches of immigrant S. furcifera coincided with a period of rainstorms. The formation of transporting southerly winds was strongly associated with the topographic terrain. Additionally, the rainfall distribution and intensity over south-central China significantly decreased when topography was reduced in the model and were directly affected by wind circulation, which was associated with mountainous terrain that caused strong convection. This study indicates that migrating populations of S. furcifera were carried by the southwesterly low-level jets and that topographically induced convergent winds, precipitation, low temperatures, and wind shear acted as key factors that led to massive landings.

Year of Publication2018
JournalInternational Journal Of Biometeorology
Journal citation62 (8), pp. 1389-1406
Digital Object Identifier (DOI)doi:10.1007/s00484-018-1538-y
Open accessPublished as non-open access
FunderNational Natural Science Foundation of China
Output statusPublished
Publication dates
Online30 Apr 2018
Publication process dates
Accepted01 Apr 2018
PublisherSpringer Nature
Springer
Copyright licensePublisher copyright
Grant ID31471763
U1202266
ISSN0020-7128

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