Invasiveness, biology, ecology, and management of the fall armyworm, Spodoptera frugiperda

Entomologia Generalis, Journal Year: 2022, Volume and Issue: 43(2), P. 187 - 241

Published: Oct. 26, 2022

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Spodoptera frugiperda: Ecology, Evolution, and Management Options of an Invasive Species

Annual Review of Entomology, Journal Year: 2022, Volume and Issue: 68(1), P. 299 - 317

Published: Oct. 6, 2022

The fall armyworm (FAW), Spodoptera frugiperda (Lepidoptera, Noctuidae), is a well-known agricultural pest in its native range, North and South America, has become major invasive around the globe past decade. In this review, we provide an overview to update what known about S. geographic ranges. This followed by discussion of studies from invaded areas gain insights into frugiperda's ecology, specifically reproductive biology, host plant use, status insecticide resistance alleles, biocontrol methods regions. We show that reference strains uninformative populations because multidirectional introduction events likely underpinned recent rapid spread. Given genomic analyses FAW much more diverse than was previously assumed, natural selection forces differ geographically, region-specific approaches will be needed control global pest.

Language: Английский

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UDP-glycosyltransferases act as key determinants of host plant range in generalist and specialist Spodoptera species

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(19)

Published: April 29, 2024

Phytophagous insects have evolved sophisticated detoxification systems to overcome the antiherbivore chemical defenses produced by many plants. However, how these biotransformation differ in generalist and specialist insect species their role determining host plant range remains an open question. Here, we show that UDP-glucosyltransferases (UGTs) play a key of within Spodoptera genus. Comparative genomic analyses breadth identified relatively conserved number UGT genes but high levels gene pseudogenization picta . CRISPR-Cas9 knockouts three main clusters frugiperda revealed UGT33 important allowing this utilize poaceous plants maize, wheat, rice, while UGT40 facilitate utilization cotton. Further functional vivo vitro SfUGT33F32 as mechanism allows S. detoxify benzoxazinoid DIMBOA (2,4-dihydroxy-7-methoxy-2H-1,4-benzoxazin-3(4H)-one), potent insecticidal phytotoxin capacity is several species, , which specializes on Crinum plants, unable due nonfunctionalizing mutation SpUGT33F34 Collectively, findings provide insight into UGTs adaptation, mechanistic basis evolutionary transitions between generalism specialism offer molecular targets for controlling group notorious pests.

Language: Английский

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Complex multiple introductions drive fall armyworm invasions into Asia and Australia

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: Jan. 12, 2023

The fall armyworm (FAW) Spodoptera frugiperda is thought to have undergone a rapid 'west-to-east' spread since 2016 when it was first identified in western Africa. Between 2018 and 2020, recorded from South Asia (SA), Southeast (SEA), East (EA), Pacific/Australia (PA). Population genomic analyses enabled the understanding of pathways, population sources, gene flow this notorious agricultural pest species. Using neutral single nucleotide polymorphic (SNP) DNA markers, we detected genome introgression that suggested most populations study were overwhelmingly C- R-strain hybrids (n = 252/262). SNP mitochondrial markers multiple introductions parsimoniously explained by anthropogenic-assisted spread, i.e., associated with international trade live/fresh plants plant products, involved 'bridgehead populations' countries enable successful establishment neighbouring countries. Distinct signatures between Myanmar China do not support 'African origin spread' nor 'Myanmar source China' hypotheses. Significant genetic differentiation different Australian states supported pathways involving distinct SEA populations. Our as biosecurity hotspot FAW melting pot, demonstrated use analysis disentangle preventable human-assisted unpreventable natural spread.

Language: Английский

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European grapevine moth, Lobesia botrana Part I: Biology and ecology

Entomologia Generalis, Journal Year: 2023, Volume and Issue: 43(2), P. 261 - 280

Published: April 28, 2023

Though the European grapevine moth, Lobesia botrana (Denis & Schiffermüller) (Lepidoptera: Tortricidae) can feed on more than forty plant species, is preferred crop worldwide.This moth a western palearctic species that has recently spread to Chile, Argentina, and California.The possible further expansion in other regions of Americas greatly feared should be monitored carefully near future.In this framework, we provide an updated review current knowledge its taxonomy, morphology, biology, ecology, genomics, geographic distribution, invasiveness.Then, last section, develop research agenda pointing out significant challenges for future investigations bio-ecology invasion which are tightly connected with prevention management strategies.

Language: Английский

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Genomic patterns of strain-specific genetic structure, linkage, and selection across fall armyworm populations

BMC Genomics, Journal Year: 2025, Volume and Issue: 26(1)

Published: Feb. 7, 2025

Abstract Background Molecular genetic approaches have become vital to understanding the evolutionary processes that act on insect pest populations. From mapping development of resistance monitoring and predicting movement, genomic tools can inform enhance management programs. Here, we used whole genome sequencing population genomics unravel novel patterns structure, linkage, selection across a notorious agricultural pest, fall armyworm. Results Our data strongly support existence two genetically distinct strains armyworm in North America, which previously been referred as C-strain R-strain. Although these diverged genetically, find differentiation is not uniform genome. The Z-chromosome appears drive divergence between with high levels linkage observed this chromosome. We also show region containing circadian clock gene implicated allochronic reproductive isolation under strain-specific selection. indicates differ their geographic distributions exhibit sub-structuring indicative unique dispersal patterns. provide first evidence for nuclear major overwintering populations US. Finally, our reveal population-specific regions putative insecticide alleles, could relate biogeography. Conclusions results dyad US, genetically-distinct differing patterns, signatures likely involved resistance. These differences should be considered when devising implementing strategies.

Language: Английский

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Genomic investigations of successful invasions: the picture emerging from recent studies

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 16, 2025

ABSTRACT Invasion biology aims to identify traits and mechanisms that contribute successful invasions, while also providing general insights into the underlying population expansion adaptation rapid climate habitat changes. Certain phenotypic attributes have been linked role of genetics has critical in understanding invasive species. Nevertheless, a comprehensive summary evaluating most common evolutionary associated with invasions across species environments is still lacking. Here we present systematic review studies since 2015 applied genomic tools investigate different organisms. We examine demographic patterns such as changes diversity at level, presence genetic bottlenecks gene flow range. selection from standing variation de novo mutations, hybridisation introgression, all which can an impact on invasion success. This recent articles led creation searchable database provide researchers accessible resource. Analysis this allowed quantitative assessment adaptive acting A predominant admixture increasing levels enabling molecular novel habitats important finding our study. The “genetic paradox” was not validated data ecosystems. Even though drift commonly reported upon invasion, large reduction rarely observed. Any decrease often relatively mild almost always restored via between populations. fact loci under are frequently detected suggests level hindered. above findings confirmed herein for first time semi‐quantitative manner by data. point gaps potential improvements design driving These include scarcity sampling multiple native populations, identification sources, longitudinal sampling, integration fitness measures analyses. note whole genome exploited fully predicting potential. Comparative identifying features promoting underrepresented despite their use tool control.

Language: Английский

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Global genomic signature reveals the evolution of fall armyworm in the Eastern hemisphere

Molecular Ecology, Journal Year: 2023, Volume and Issue: 32(20), P. 5463 - 5478

Published: Aug. 28, 2023

The major plant pest fall armyworm (FAW), Spodoptera frugiperda, is native to the Americas and has colonized Africa Asia within Eastern hemisphere since 2016, causing severe damage multiple agricultural crop species. However, genetic origin of these invasive populations requires more in-depth exploration. We analysed variation across genomes 280 FAW individuals from both Americas. global range-wide structure shows that in America experienced deep differentiation, largely consistent with Z-chromosomal Tpi haplotypes commonly used differentiate 'corn-strain' 'rice-strain' populations. are different American ones have a relatively homogeneous population structure, common recent spreading Asia. Our analyses suggest north- central most likely sources invasion into hemisphere. Furthermore, evidence based on genomic, transcriptomic mitochondrial haplotype network indicates an earlier, independent introduction Africa, subsequent migration population.

Language: Английский

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CRISPR-Cas9 mediated dsRNase knockout improves RNAi efficiency in the fall armyworm

Pesticide Biochemistry and Physiology, Journal Year: 2024, Volume and Issue: 200, P. 105839 - 105839

Published: Feb. 23, 2024

Language: Английский

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The evolutionary process of invasion in the fall armyworm (Spodoptera frugiperda)

Scientific Reports, Journal Year: 2022, Volume and Issue: 12(1)

Published: Dec. 6, 2022

Abstract The fall armyworm (FAW; S podoptera frugiperda ) is one of the major agricultural pest insects. FAW native to Americas, and its invasion was first reported in West Africa 2016. Then it quickly spread through Africa, Asia, Oceania, becoming main threats corn production. We analyzed whole genome sequences 177 individuals from 12 locations on four continents infer evolutionary processes invasion. Principal component analysis TPI gene shows that invasive populations originated strain. Ancestry coefficient phylogenetic analyses nuclear indicate are derived a single ancestry, distinct populations, while mitochondrial tree supports hypothesis multiple introductions. Adaptive evolution specific observed detoxification, chemosensory, digestion genes. concluded extant strain with potential contributions adaptive evolution.

Language: Английский

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