Analysis of strain distribution, migratory potential, and invasion history of fall armyworm populations in northern Sub-Saharan Africa

Scientific Reports
Rodney N NagoshiRobert L Meagher

Abstract

Fall armyworm (Spodoptera frugiperda J.E. Smith) is a noctuid moth pest endemic throughout the Western Hemisphere that has recently become widespread in sub-Saharan Africa. There is a strong expectation of significant damage to African maize crop yield and a high likelihood of further dispersal, putting the rest of the Eastern Hemisphere at risk. Specimens from multiple locations in six countries spanning the northern portion of the infested region were analyzed for genetic markers. The similarity of haplotypes between the African collections was consistent with a common origin, but significant differences in the relative frequency of the haplotypes indicated limitations in migration. The mitochondrial marker frequently used to identify two host strains appears to be compromised, making uncertain previous reports that both strains are present in Africa. This more extensive study confirmed initial indications based on Togo populations that Florida and the Greater Antilles are the likely source of at least a subset of the African infestation and further suggest an entry point in western Africa. The origin of a second subgroup is less clear as it was rarely found in the collections and has a haplotype that has not yet been observe...Continue Reading

References

Jan 14, 2012·Journal of Insect Science·Rodney N NagoshiRobert L Meagher
Mar 22, 2014·Annals of the New York Academy of Sciences·Peter RanumMaria Nieves Garcia-Casal
Jun 6, 2015·International Journal of Biometeorology·J K WestbrookS Jairam
May 7, 2016·Evolution; International Journal of Organic Evolution·Silvia KostAstrid T Groot
May 6, 2017·Science·Erik Stokstad

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Citations

Mar 14, 2019·Journal of Economic Entomology·A S BothaJohnnie Van den Berg
Apr 25, 2018·Proceedings of the National Academy of Sciences of the United States of America·James Mallet
Aug 31, 2018·EFSA Journal·UNKNOWN EFSA Panel on Plant Health (EFSA PLH Panel)Alan MacLeod
Jul 25, 2019·Mitochondrial DNA. Part B, Resources·Tingting Liu, Zhaofei Li
Dec 18, 2020·Crop Science·Prince M MatovaMaryke Labuschagne
Feb 25, 2021·Pest Management Science·Renato J HorikoshiGraham Head
Apr 7, 2021·Journal of Economic Entomology·Djima KoffiRodney N Nagoshi
Nov 14, 2020·Communications Biology·Sylvie GimenezKiwoong Nam
Aug 5, 2021·Journal of Chemical Ecology·Jessica P Yactayo-ChangAnna K Block

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Methods Mentioned

BETA
PCR

Software Mentioned

Quantum Geographic Information System
MUSCLE
QGIS
Geneious Pro

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