Evaluation of efficacy of insecticides against the fall army worm <i>Spodoptera frugiperda</i>

Worku, Mintesnot; Ebabuye, Yohannes

doi:10.5958/0974-8172.2019.00076.2

Cited by 16 publications

(14 citation statements)

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“…While multiple introductions especially in the Asian continent (e.g., China, Vietnam, Malaysia; Vu 2008, Nguyen and Vu 2009, Tay and Gordon 2019, Gui et al 2020, Tay et al 2021b, Jiang et al 2022, Tay et al 2022d; this study) have played an important role leading to the perception of rapid spread, introductions from elsewhere have also contributed to the African establishment and expansion. Further to genomics evidence, resistance allele characterisation and bioassay experiments have also identified invasive populations with non-overlapping unique insecticide resistance profiles in China (e.g., Lv et al 2021), Indonesia (Boaventura et al 2020), Australia (Tay et al 2021a, Tay et al 2022c), India (Deshmukh et al 2020), and Africa (Eriksson 2019, Worku and Ebabuye 2019).…”

Section: Discussionmentioning

confidence: 99%

“…The copyright holder for this preprint (which this version posted July 16, 2022. ; https://doi.org/10.1101/2022.06.11.495773 doi: bioRxiv preprint profiles in China (e.g., Lv et al 2021), Indonesia (Boaventura et al 2020), Australia (Tay et al 2021a, Tay et al 2022c, India (Deshmukh et al 2020), and Africa (Eriksson 2019, Worku andEbabuye 2019).…”

Section: Discussionmentioning

confidence: 99%

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Complex multiple introductions drive fall armyworm invasions into Asia and Australia

Rane¹,

Walsh²,

Lenancker

et al. 2022

Preprint

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

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Complex multiple introductions drive fall armyworm invasions into Asia and Australia

Rane¹,

Walsh²,

Lenancker

et al. 2022

Preprint

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“…Thus, nearly 50% insecticide/ unit area got reduced, also sand application into the whorl directly targets the larvae, as a result larva try to come out of the whorl and hence larvae got damaged through abrasion to the cuticle (Babendreier et al, 2020). Worku and Ebabuye (2019) found that there was no significant difference in the efficacy of insecticides between whorl application and foliar spray. The present study concludes that the quantity of insecticide/ unit area is reduced, also it increased effectiveness as it remained in the whorl for 4-5 days, with additional physical effects of sand (abrasion and other physical damage to cuticle).…”

Section: Resultsmentioning

confidence: 99%

“…The present study concludes that the quantity of insecticide/ unit area is reduced, also it increased effectiveness as it remained in the whorl for 4-5 days, with additional physical effects of sand (abrasion and other physical damage to cuticle). The applied sand slowly comes out of the whorl as the plant develops without interfering in the plant growth (Babendreier et al, 2020;Worku and Ebabuye, 2019).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Whorl Application of Insecticides Mixed With Sand Against Fall Army Worm Spodoptera frugiperda in Maize

Divya

Kalleshwaraswamy

Deshmukh

et al. 2021

ije

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The fall army worm (FAW) Spodoptera frugiperda is now spread all over India and at present, spraying insecticides is the primary method of control. Considering its presence in whorl and negative impact of insecticidal spray on the natural enemies, there is a need of evolving alternate techniques. In the present study, whorl application of insecticides mixed in river sand was evaluated for its efficacy. Sand mixed with chlorantraniliprole 18.5SC @0.4 ml/ kg, emamectin benzoate 5SG@ 0.4 g/ kg and spinosad 45SC @ 0.4 ml/ kg sand were found to be effective, with significant reduction in leaf damage. The quantity of insecticide required/ unit area was 50% less than the spray while maximum grain yield/ cost benefit ratio was obtained.

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“…insecticidal and Bt control agents is increasingly investigated at recently impacted localities (e.g.,Worku and Ebabuye 2019, Deshmukh et al 2020, Zhang et al 2020, Kulye et al 2021, Lv et al 2021). However, the diverse bioassay methods (approach, larval stage, scoring criteria) used in these studies complicate meaningfullycomparison of findings.…”

mentioning

confidence: 99%

Resistance bioassays and allele characterisation inform analysis ofSpodoptera frugiperda(Lepidoptera: Noctuidae) introduction pathways in Asia and Australia

Tay

Rane

James

et al. 2022

Preprint

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The fall armyworm Spodoptera frugiperda is present in over 70 countries in Africa, Asia, and Oceania. Its rapid dispersal since 2016 since first reported in western Africa, and associated devastation to agricultural productivity, highlight the challenges posed by this pest. Currently, its management largely relies on insecticide sprays and transgenic Bacillus thuringiensis toxins, therefore understanding their responses to these agents and characteristics of any resistance genes enables adaptive strategies. In Australia, S. frugiperda was reported at the end of January 2020 in northern Queensland and by March 2020, also in northern Western Australia. We undertook bioassays on two Australian populations, one each from these initial points of establishment. To assist with resistance response interpretation, two related endemic noctuid pest species, Helicoverpa armigera and Spodoptera litura, were concurrently screened to obtained LC50 estimates for larvae against a range of insecticides. We characterised known resistance alleles from the VGSC, ACE-1, RyR, and ABCC2 genes for five populations to compared with published allele frequencies and bioassay responses from native and invasive S. frugiperda populations. An approximately 10x LC50 difference for indoxacarb was detected between Australian populations, which was approximately 28x higher than an Indian population. Characterisation of ACE-1 and VGSC alleles provided further evidence of multiple introductions in Asia, and multiple pathways involving genetically distinct individuals into Australia. Bioassay results and resistance allele patterns from invasive S. frugiperda populations therefore suggest multiple introduction events have contributed to the pest′s spread in the Old World, and challenge the axiom of its rapid ′west-to-east′ spread.

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Evaluation of efficacy of insecticides against the fall army worm Spodoptera frugiperda

Cited by 16 publications

References 0 publications

Complex multiple introductions drive fall armyworm invasions into Asia and Australia

Complex multiple introductions drive fall armyworm invasions into Asia and Australia

Evaluation of Whorl Application of Insecticides Mixed With Sand Against Fall Army Worm Spodoptera frugiperda in Maize

Resistance bioassays and allele characterisation inform analysis ofSpodoptera frugiperda(Lepidoptera: Noctuidae) introduction pathways in Asia and Australia

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