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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Resistance in the Genus Spodoptera: Key Insect Detoxification Genes

Insects, Journal Year: 2021, Volume and Issue: 12(6), P. 544 - 544

Published: June 11, 2021

The genus Spodoptera (Lepidoptera: Noctuidae) includes species that are among the most important crop pests in world. These polyphagous able to feed on many plants, including corn, rice and cotton. In addition their ability adapt toxic compounds produced by they have developed resistance chemical insecticides used for control. One of main mechanisms insects become resistant involves detoxification enzymes. this review, we illustrate some examples role major families enzymes such as cytochromes P450, carboxyl/cholinesterases, glutathione S-transferases (GST) transporters ATP-binding cassette (ABC) insecticide resistance. We compare available data four species, exigua, S. frugiperda, littoralis litura. Molecular underlying involvement these genes will be described, duplication CYP9A cluster, over-expression GST epsilon or point mutations acetylcholinesterase ABCC2. This review is not intended exhaustive but highlight key roles certain genes.

Language: Английский

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Chemical Control and Insecticide Resistance inSpodoptera frugiperda(Lepidoptera: Noctuidae)

Journal of Economic Entomology, Journal Year: 2022, Volume and Issue: 115(6), P. 1761 - 1771

Published: Dec. 1, 2022

Abstract Insecticides and genetically modified Bt crops are the main tools for control of fall armyworm, Spodoptera frugiperda (J.E. Smith). Since its invasion Africa, Far East, Australia where largely absent, insecticide use has increased reduced susceptibility to several insecticides used decades in native distribution area have been reported. Poor efficacy at field-level is sometimes incorrectly ascribed pest resistance, while numerous other factors influence field-level. In this paper, we review history resistance S. discuss that life traits, migration ecology, chemical practices may on evolution. The indirect role poor national policies pesticide practices, indirectly selection pressure discussed. Evidence shows local drives Integrated management, rather than reliance a single tactic, best way suppress numbers over-use which selects resistance.

Language: Английский

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Parasitoid Distribution and Parasitism of the Fall Armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) in Different Maize Producing Regions of Uganda

Insects, Journal Year: 2021, Volume and Issue: 12(2), P. 121 - 121

Published: Jan. 29, 2021

The fall armyworm (FAW) Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) has successfully invaded Africa, where it significantly impacted maize and sorghum production. Management of FAW in Africa predominantly relies on synthetic insecticides, which are expensive, negatively impact the environment beneficial insects. We, therefore, conducted field surveys Uganda 2017 2019 to identify egg larval parasitoids for possible use integrated pest management (IPM) programs. Parasitoids were identified by their mitochondrial DNA cytochrome c oxidase subunit 1 (mtCOI) gene sequences. We 13 parasitoid species belonging three families Hymenoptera: Platygastridae, Braconidae Ichneumonidae, as well one Dipteran family (Tachinidae). Coccygidium spp. Chelonus bifoveolatus most abundant widely distributed parasitoids. Overall, parasitism averaged 9.2% ranged from 3.1% 50% 2017, 0.8% 33% 2019. Parasitism Sturmiopsis parasitica, Diolcogaster sp., Cotesia flavipes crops reported first time. Our results suggest high biological diversity parasitoids, should be exploited IPM Uganda.

Language: Английский

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Detection of organophosphorus pesticides by nanogold/mercaptomethamidophos multi-residue electrochemical biosensor

Food Chemistry, Journal Year: 2021, Volume and Issue: 354, P. 129511 - 129511

Published: March 9, 2021

Language: Английский

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Metabolic-based insecticide resistance mechanism and ecofriendly approaches for controlling of beet armyworm Spodoptera exigua: a review

Environmental Science and Pollution Research, Journal Year: 2021, Volume and Issue: 29(2), P. 1746 - 1762

Published: Oct. 28, 2021

Language: Английский

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Insecticide resistance in Australian Spodoptera frugiperda (J.E. Smith) and development of testing procedures for resistance surveillance

PLoS ONE, Journal Year: 2022, Volume and Issue: 17(2), P. e0263677 - e0263677

Published: Feb. 10, 2022

Spodoptera frugiperda (J.E. Smith) is a highly invasive noctuid pest first reported in northern Australia during early 2020. To document current status of resistance S. Australia, insecticide toxicity was tested field populations collected the year establishment, between March 2020 and 2021. Dose-response measured by larval bioassay 11 susceptible laboratory strain Helicoverpa armigera. Emamectin benzoate most efficacious (LC50 0.023μg/ml) followed chlorantraniliprole 0.055μg/ml), spinetoram 0.098μg/ml), spinosad 0.526μg/ml), methoxyfenozide (1.413μg/ml). Indoxacarb least toxic selective on 3.789μg/ml). benzoate, were 2- to 7-fold less compared with H. armigera while spinosyns equally both species. 28-fold There decreased sensitivity Group 1 insecticides synthetic pyrethroids armigera: reduced up 11-fold for methomyl, 56 199-fold cyhalothrin, 44 132-fold alpha cypermethrin. Synergism bioassays metabolic inhibitors suggest involvement mixed function oxidase pyrethroid resistance. Recommended diagnostic doses emamectin chlorantraniliprole, spinetoram, spinosad, indoxacarb are 0.19, 1.0, 0.75, 6, 12 48μg/μl, respectively.

Language: Английский

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Divergent amplifications of CYP9A cytochrome P450 genes provide two noctuid pests with differential protection against xenobiotics

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(37)

Published: Sept. 5, 2023

Here, we provide mechanistic support for the involvement of CYP9A subfamily cytochrome P450 monooxygenases in detoxification host plant defense compounds and chemical insecticides Spodoptera exigua frugiperda . Our comparative genomics shows that a large cluster genes occurs two species but with significant differences its contents, including several species-specific duplicates substantial sequence divergence, both between orthologs duplicates. Bioassays CRISPR-Cas9 knockouts clusters show that, collectively, CYP9As can detoxify furanocoumarin (imperatorin xanthotoxin) representing three different chemotypes (pyrethroids, avermectins, oxadiazines). However, vitro metabolic assays heterologously expressed products individual particular activities against these compounds. We also find tight genetic linkage high levels pyrethroid resistance field strains species. propose their divergent amplifications have not only contributed to development broad ranges over long evolutionary timeframes supplied them diverse options evolving very recent past.

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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The Essential and Enigmatic Role of ABC Transporters in Bt Resistance of Noctuids and Other Insect Pests of Agriculture

Insects, Journal Year: 2021, Volume and Issue: 12(5), P. 389 - 389

Published: April 28, 2021

In the last ten years, ABC transporters have emerged as unexpected yet significant contributors to pest resistance insecticidal pore-forming proteins from Bacillus thuringiensis (Bt). Evidence includes presence of mutations in resistant insects, heterologous expression probe interactions with three-domain Cry toxins, and CRISPR/Cas9 knockouts. Yet mechanisms by which facilitate pore formation remain obscure. The three major classes toxins used agriculture been found target transporters, requires a mechanistic explanation. Many other families bacterial exhibit conformational changes their mode action, are not described for toxins. Three-dimensional structures relevant multimeric membrane, that assist process required test hypothesis ATP-switch mechanism provides motive force drives into membrane. Knowledge insertion will be combat is now evolving field populations including noctuids.

Language: Английский

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