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Genetic studies of fall armyworm indicate a new introduction into Africa and identify limits to its migratory behavior

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Title Genetic studies of fall armyworm indicate a new introduction into Africa and identify limits to its migratory behavior
 
Creator Nagoshi, R.N.
Goergen, G.
Koffi, D.
Agboka, K.
Adjevi, A.K.M.
du Plessis, H.
Van den Berg, J.
Tepa-Yotto, G.
Winsou, J.K.
Meagher, R.L.
Brevault, T.
 
Subject spodoptera frugiperda
fall armywarm
genotypes
 
Description Open Access Journal; Published online: 04 Feb 2022
The fall armyworm, Spodoptera frugiperda (J.E. Smith) is native to the Americas and a major pest of corn and several other crops of economic importance. The species has characteristics that make it of particular concern as an invasive pest, including broad host range, long-distance migration behavior, and a propensity for field-evolved pesticide resistance. The discovery of fall armyworm in western Africa in 2016 was followed by what was apparently a remarkably rapid spread throughout sub-Saharan Africa by 2018, causing economic damage estimated in the tens of billions USD and threatening the food security of the continent. Understanding the history of the fall armyworm invasion of Africa and the genetic composition of the African populations is critical to assessing the risk posed to different crop types, the development of effective mitigation strategies, and to make Africa less vulnerable to future invasions of migratory moth pests. This paper tested and expanded on previous studies by combining data from 22 sub-Saharan nations during the period from 2016 to 2019. The results support initial descriptions of the fall armyworm invasion, including the near absence of the strain that prefers rice, millet, and pasture grasses, while providing additional evidence that the magnitude and extent of FAW natural migration on the continent is more limited than expected. The results also show that a second entry of fall armyworm likely occurred in western Africa from a source different than that of the original introduction. These findings indicate that western Africa continues to be at high risk of future introductions of FAW, which could complicate mitigation efforts.
 
Date 2022
2023-01-10T15:08:38Z
2023-01-10T15:08:38Z
 
Type Journal Article
 
Identifier Nagoshi, R.N., Goergen, G., Koffi, D., Agboka, K., Adjevi, A.K.M., Du Plessis, H., ... & Brévault, T. (2022). Genetic studies of fall armyworm indicate a new introduction into Africa and identify limits to its migratory behavior. Scientific Reports, 12(1), 1-12.
2045-2322
https://hdl.handle.net/10568/126749
https://doi.org/10.1038/s41598-022-05781-z
BIOTECH & PLANT BREEDING
PLANT PRODUCTION & HEALTH
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 1-12
application/pdf
 
Source Scientific Reports