Esterase‐mediated resistance to pyrethroids in field populations of <i>Helicoverpa armigera</i> (Lepidoptera: Noctuidae) from Central Africa

Achaleke, Joseph; Martin, Thibaud; Ghogomu, Richard; Vaissayre, Maurice; Brévault, Thierry

doi:10.1002/ps.1807

Cited by 55 publications

(29 citation statements)

References 39 publications

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“…Knowing the potential origins of H. armigera in Brazil will provide valuable insights for its managing in the New World. In Cameroon, China and India, H. armigera carries resistance to synthetic pyrethroids646566, organophosphates6768 and carbamates6970. Resistance to diverse classes of pyrethroids has also been reported in populations from Benin (west Africa)71.…”

Section: Discussionmentioning

confidence: 99%

Mitochondrial DNA and trade data support multiple origins of Helicoverpa armigera (Lepidoptera, Noctuidae) in Brazil

Tay

Walsh

Downes

et al. 2017

Sci Rep

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The Old World bollworm Helicoverpa armigera is now established in Brazil but efforts to identify incursion origin(s) and pathway(s) have met with limited success due to the patchiness of available data. Using international agricultural/horticultural commodity trade data and mitochondrial DNA (mtDNA) cytochrome oxidase I (COI) and cytochrome b (Cyt b) gene markers, we inferred the origins and incursion pathways into Brazil. We detected 20 mtDNA haplotypes from six Brazilian states, eight of which were new to our 97 global COI-Cyt b haplotype database. Direct sequence matches indicated five Brazilian haplotypes had Asian, African, and European origins. We identified 45 parsimoniously informative sites and multiple substitutions per site within the concatenated (945 bp) nucleotide dataset, implying that probabilistic phylogenetic analysis methods are needed. High diversity and signatures of uniquely shared haplotypes with diverse localities combined with the trade data suggested multiple incursions and introduction origins in Brazil. Increasing agricultural/horticultural trade activities between the Old and New Worlds represents a significant biosecurity risk factor. Identifying pest origins will enable resistance profiling that reflects countries of origin to be included when developing a resistance management strategy, while identifying incursion pathways will improve biosecurity protocols and risk analysis at biosecurity hotspots including national ports.

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Section: Discussionmentioning

confidence: 99%

Mitochondrial DNA and trade data support multiple origins of Helicoverpa armigera (Lepidoptera, Noctuidae) in Brazil

Tay

Walsh

Downes

et al. 2017

Sci Rep

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“…The association is particularly strong in data for populations from Australia, [39][40][41][42] south and southeast Asia [43][44][45][46][47][48][49][50][51] and central Africa 52,53) and is also significant in Chinese populations, 46,54,55) although it has not been found in west African populations. [56][57][58] Whether this geographic variation in the strength of the associations reflects genetic differences among populations or methodological differences among investigators is moot, although some effect of genetic differences seems likely.…”

Section: Heliothine Resistance To Spsmentioning

confidence: 99%

Esterase-based metabolic resistance to insecticides in heliothine and spodopteran pests

Farnsworth

Teese

Yuan

et al. 2010

Journal of Pesticide Science

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IntroductionCarboxylesterases have been implicated in metabolic resistance to several classes of insecticide in a wide variety of pest insect species. [1][2][3] The classes most commonly involved are synthetic pyrethroids (SPs) and organophosphates (OPs), and carbamates (CBs) are also involved in several cases. There are also occasional reports of carboxylesterase phenotypes associated with resistance to benzoylureas, the oxadiazine indoxacarb, the diacylhydrazine tebufenozide, the organochlorine endosulfan and the proteinaceous Cry1Ac toxin of Bacillus thuringiensis that is expressed in transgenic crops. Figure 1 gives structures for some key compounds among these various classes of insecticide.It might be expected that carboxylesterases would be involved in SP resistance because the great majority of SPs are carboxylesters. However, no precise molecular mechanisms for esterase-based SP resistance have yet been elucidated in any insect. OPs are generally phosphotriesters rather than carboxylesters but nevertheless they bind many carboxylesterases with high affinity and this provides a basis for two forms of resistance, both now elucidated at a molecular level in several species. One form involves substantial overexpression of the esterase, allowing for effective sequestration of the insecticide. The other involves specific mutations in the active site of the enzyme which convert it to an OP hydrolase (the so-called "mutant ali-esterase" mechanism). CBs are carbamic acid (NH 2 COOH) derivatives, in which a functional group has been added as an ester; these esters are chemically similar to carboxylesters. Carbamates bind carboxylesterases with quite high affinity, but as yet the molecular mechanisms by which a (mutant) carboxylesterase confers CB resistance have not been elucidated in any species. Of the other insecticide classes occasionally linked to esterase-based resistance only indoxacarb has ester bonds (two Elevated esterase activities and increased band intensities of multiple esterase isozymes after electrophoresis are commonly associated with resistance to organophosphate, pyrethroid and carbamate insecticides in various heliothine and spodopteran pests. One possible explanation for this involves a 'master regulator' mutation in a more general chemical stress response. An association between elevated esterase activities and isozyme intensities has also been reported for resistance to the Cry1Ac toxin of Helicoverpa armigera. The basis for this is unclear albeit some involvement of esterases could be mediated by the toxin's affinity for N-acetyl galactosamine glycans on certain gut-expressed esterases in this species.

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“…While target site insensitivity is clearly also involved, enhanced detoxification is consistently implicated in the resistance, including both oxidative and hydrolytic metabolism, mediated by cytochrome P450s (P450s) and carboxyl/cholinesterases (CCEs) respectively (McCaffery, 1998). However the relative importance of the two detoxification systems appears to vary among populations from Australia, Asia and Africa (Gunning et al, 1996(Gunning et al, , 1999Martin et al, 2002;Yang et al, 2004;Achaleke et al, 2009;Abd El-Latif and Subrahmanyam, 2009;Farnsworth et al, 2010).…”

Section: Introductionmentioning

confidence: 98%

Overexpressed esterases in a fenvalerate resistant strain of the cotton bollworm, Helicoverpa armigera

Yang

Yuan

et al. 2011

Insect Biochemistry and Molecular Biology

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Esterase‐mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa

Abstract: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.

Cited by 55 publications

References 39 publications

Mitochondrial DNA and trade data support multiple origins of Helicoverpa armigera (Lepidoptera, Noctuidae) in Brazil

Mitochondrial DNA and trade data support multiple origins of Helicoverpa armigera (Lepidoptera, Noctuidae) in Brazil

Esterase-based metabolic resistance to insecticides in heliothine and spodopteran pests

Overexpressed esterases in a fenvalerate resistant strain of the cotton bollworm, Helicoverpa armigera

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