Resistance of the Tea Leaf Roller, &lt;i&gt;Caloptilia theivora&lt;/i&gt;（Lepidoptera: Gracillariidae）, to Flufenoxuron in Kagoshima Prefecture, Japan

剛, 上室; 昭子, 東垂水; 博, 末永

doi:10.1303/jjaez.2017.99

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…With its successive application in pest control, methoxyfenozide has further found efficacy against Spodoptera exigua , diamondback moth ( Plutella xylostella L.) and Spodoptera litura , which are among the major pests in cauliflower . As for pests in tea gardens, methoxyfenozide has only been confirmed to be effective against tea leaf roller and tea geometrid ( Ectropis obliqua ) so far. Thus it is of great importance and impendence to establish guidance for the safe use of methoxyfenozide in the field by means of understanding its dissipation behavior and final residue, especially for cauliflower.…”

Section: Introductionmentioning

confidence: 99%

Residue dissipation and dietary exposure risk assessment of methoxyfenozide in cauliflower and tea via modified QuEChERS using UPLC/MS/MS

et al. 2020

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BACKGROUND Methoxyfenozide possesses efficacy against a variety of lepidopteron pests, including the major pests in cauliflower and tea, so it is of great importance to generalize the practical use of methoxyfenozide in the field. RESULTS An efficient method was developed and validated in both vegetable matrix and extract‐rich matrix (cauliflower and tea) using modified QuEChERS combined with UPLC/MS/MS analysis. The recoveries in cauliflower, made tea and tea shoots ranged from 94.5 to 108.0%, from 85.0 to 91.6% and from 77.3 to 82.0% respectively, with relative standard deviations (RSDs) below 17.3% in all cases. The field results showed that methoxyfenozide dissipated in cauliflower with half‐life (t1/2) at 2.5–3.5 days and in tea with t1/2 at 1.2 days. Combining the above experimental data and statistical food intake values, the risk quotient (RQ) values were significantly lower than 1. CONCLUSION The quantification method of methoxyfenozide in cauliflower or tea has not been established until this study. The dissipation and dietary exposure risk assessment of methoxyfenozide in cauliflower and tea were investigated in the field. Methoxyfenozide dissipated rapidly in cauliflower despite different climates, and it dissipated faster in tea. The dietary risk of methoxyfenozide through cauliflower or tea was negligible to humans. This study not only provides guidance for the safe use of methoxyfenozide but also serves as a reference for the establishment of maximum residue limits (MRLs) in China. © 2019 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Residue dissipation and dietary exposure risk assessment of methoxyfenozide in cauliflower and tea via modified QuEChERS using UPLC/MS/MS

et al. 2020

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“…Additionally, other pest insects might rapidly evolve resistance if the high mutation rate of RyR is universal. In fact, resistance to diamides was recently reported in several species 80–83 …”

Section: Resultsmentioning

confidence: 98%

“…In fact, resistance to diamides was recently reported in several species. [80][81][82][83] The gene flow of resistance mutations has expanded resistance to diamides in east and southeast Asia, despite the geographical barrier. This is the first evidence showing global gene flow of the resistance allele in P. xylostella.…”

Section: Resultsmentioning

confidence: 99%

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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“…The tea leaf roller, Caloptilia theivora (Walsingham), belonging to the family Gracillariidae in the order Lepidoptera, is a serious pest of tea plants in China and Japan (Kamimuro et al 2017(Kamimuro et al , 2018. The larvae feed on the leaves of Camellia sinensis, C. japonica, C. sasanqua, and C. theifera.…”

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confidence: 99%

Characterization of the complete mitochondrial genome of the tea leaf roller Caloptilia theivora (Insecta: Lepidoptera: Gracillariidae)

Chen

Jiang

Shang

et al. 2019

Mitochondrial DNA Part B

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The tea leaf roller, Caloptilia theivora (Walsingham), is a serious pest of tea plants. We have obtained and annotated the complete mitochondrial genome of C. theivora (GenBank accession No. MK541932). The entire mt genome is 15,297 bp long with an A + T content of 80.66%. The mt genome of C. theivora encodes all 37 genes that are typically found in animal mt genomes, consists of 13 protein-coding genes, 2 ribosomal RNA, and 22 transfer RNA genes. The gene order is consistent with other moths mt genome in Ditrysia. The control region of this genome is 192 bp long with a high A + T content of 96.35%, and located between the rrnS and trnI genes. Phylogenetic analysis was performed using 13 protein-coding genes among 19 moths showed that C. theivora is closely related to species of Gracillariidae.

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Resistance of the Tea Leaf Roller, <i>Caloptilia theivora</i>（Lepidoptera: Gracillariidae）, to Flufenoxuron in Kagoshima Prefecture, Japan

Cited by 6 publications

References 18 publications

Residue dissipation and dietary exposure risk assessment of methoxyfenozide in cauliflower and tea via modified QuEChERS using UPLC/MS/MS

Residue dissipation and dietary exposure risk assessment of methoxyfenozide in cauliflower and tea via modified QuEChERS using UPLC/MS/MS

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

Characterization of the complete mitochondrial genome of the tea leaf roller Caloptilia theivora (Insecta: Lepidoptera: Gracillariidae)

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