Integrative and Comparative Biology Advance Access originally published online on May 22, 2008
Integrative and Comparative Biology 2008 48(1):99-106; doi:10.1093/icb/icn040
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Published by Oxford University Press 2008.
This article appears in the following Integrative and Comparitive Biology issue: Aeroecology: Probing and Modeling the Aerosphere–The Next Frontier [View the issue table of contents]
Noctuid migration in Texas within the nocturnal aeroecological boundary layer
Areawide Pest Management Research Unit, US Department of Agriculture, Agricultural Research Service, College Station, TX 77845, USA
Correspondence: 1E-mail: John.Westbrook{at}ars.usda.gov
Long-distance migration of adult corn earworm moths (Helicoverpa zea), and several other noctuid moth species, facilitates seasonal expansion of pest populations and consequent increased infestations of agricultural crops on a continental scale in North America. Long-term field studies of population dynamics and migratory flights of H. zea and fall armyworm (Spodoptera frugiperda) in the United States were evaluated using X-band radar observations and profiles of atmospheric conditions. These studies identified characteristic patterns of migratory flight that are largely associated with vertical profiles of temperature and wind speed. Collective patterns of moth migrations were generally highly correlated with wind headings, but often at a significant angular deviation. Preliminary analyses are presented between moth distributions in the aerosphere estimated from discrete moth counts using X-band radar and bulk reflectivity data from NEXRAD Doppler radar. Identification of associations between atmospheric factors and noctuid population dynamics and migratory flights will improve the ability to predict infestations by pest species throughout their broad seasonal range expansion.
From the symposium "Aeroecology: Probing and Modeling the Atmosphere—The Next Frontier" presented at the annual meeting of the Society for Integrative and Comparative Biology, January 2–6, 2008, at San Antonio, Texas.