Decline in susceptibility to diamide insecticides of the diamondback moth , &lt;i&gt;Plutella xylostella&lt;/i&gt; L.(Lepidoptera), collected in Kagoshima Prefecture

doi:10.4241/kyubyochu.60.75

Cited by 11 publications

(1 citation statement)

References 8 publications

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“…In Japan, resistance to flubendiamide and chlorantraniliprole in P. xylostella has been reported since the first confirmation of its occurrence in 2013. [2][3][4][5] The amino acid mutation G4946E in the ryano-dine receptor is a major factor in target-insensitive resistance to flubendiamide and chlorantraniliprole in P. xylostella. [6][7][8][9] The involvement of metabolic detoxification enzymes in high-level diamide resistance has not been reported.…”

Section: Introductionmentioning

confidence: 99%

Field survey of ryanodine receptor mutations (G4946E and I4790K) and their effects on biotic performance in the diamondback moth

et al. 2020

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This study examined changes in the proportions of ryanodine receptor mutations (G4946E and I4790K) for Plutella xylostella populations in the field. Results show that the proportion of G4946E decreased during the survey years without diamide application and that insects with I4790K were observed less frequently during the survey period. This study also examined the biotic performances of diamide-resistant P. xylostella strains. The results show that the diamide-resistant strains exhibited hatchability, larval development, and fecundity equivalent to those of diamide-susceptible strains.

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Section: Introductionmentioning

confidence: 99%

Field survey of ryanodine receptor mutations (G4946E and I4790K) and their effects on biotic performance in the diamondback moth

et al. 2020

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Origin, selection, and spread of diamide insecticide resistance allele in field populations of diamondback moth in east and southeast Asia

Uesugi

Jouraku

Pattalung³

et al. 2020

Pest Management Science

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BACKGROUND: The investigation of molecular mechanisms and evolution of resistance to insecticides is an ongoing challenge, as researchers must provide guidance to manage the resistance to achieve sustainable production in agriculture. Predicting, monitoring, and managing insecticide resistance requires information on the origins, selection, and spread of resistance genes. The resistance of Plutella xylostella (L.) against diamide insecticides is becoming an increasingly severe problem in east and southeast Asia. In this study, the evolution of resistance was investigated using a resistance allele [ryanodine receptor (RyR); G4946E mutation] and its flanking regions, as well as mitochondrial cytochrome c oxidase subunit I (mtCOI). RESULTS: The sequences of the flanking region of the G4946E and mtCOI suggested that the G4946E mutation has a key role in resistance. Furthermore, the G4946E mutation has multiple origins, and congenic resistant mutations have spread across east and southeast Asia, despite substantial geographical barriers. In addition, the susceptibility of field populations partially recovered during winter, based on the observed decrease in the G4946E (resistant allele) frequency. Finally, the resistance level indexed by the frequency of the E4946 allele was significantly lower in non-overwintering regions than in overwintering regions. CONCLUSION: The information of the present study is useful to monitor resistance using molecular markers and to develop strategies to delay the evolution of diamide resistance.

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Historical changes in the lethal effects of insecticides against the diamondback moth, Plutella xylostella (L.)

Uesugi

2021

Pest Management Science

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BACKGROUND: The diamondback moth, Plutella xylostella (L.), is one of the most destructive pests owing to the rapid development of resistance to various groups of insecticides. Although the rotation strategy has become common, resistance management continues to be a critical issue. RESULTS: In Japan, historical changes in the susceptibility of P. xylostella to insecticides were estimated using 82 references. The meta-analysis using generalized linear mixed models suggested that each mode of action (MoA) had different patterns of changes to the susceptibility, which might be due to the prevalence of the rotation strategy since the 2010s and the fitness cost of the resistance gene. For example, spinosyns and bacterial insecticide Bacillus thuringiensis (Bt), for which resistance has a high fitness cost, maintained high lethal effects on P. xylostella throughout several decades. However, pyrethroids and benzoylureas, for which resistance has no or little fitness cost, remained at low levels of susceptibility regardless of the rotation strategy.CONCLUSION: Our findings suggest optimal combinations of MoA for a sustainable rotation strategy based on their stability and recovery of effectiveness. Susceptibility monitoring using our method and further study of fitness costs will improve the rotation strategy concerning P. xylostella in the future.

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Decline in susceptibility to diamide insecticides of the diamondback moth , <i>Plutella xylostella</i> L.(Lepidoptera), collected in Kagoshima Prefecture

Cited by 11 publications

References 8 publications

Field survey of ryanodine receptor mutations (G4946E and I4790K) and their effects on biotic performance in the diamondback moth

Field survey of ryanodine receptor mutations (G4946E and I4790K) and their effects on biotic performance in the diamondback moth

Origin, selection, and spread of diamide insecticide resistance allele in field populations of diamondback moth in east and southeast Asia

Historical changes in the lethal effects of insecticides against the diamondback moth, Plutella xylostella (L.)

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