Characterization of cyantraniliprole resistance in Spodoptera frugiperda: Selection, inheritance pattern, and cross‐resistance to other diamide insecticides

Pest Management Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Abstract BACKGROUND Cyantraniliprole, a diamide insecticide, is widely used in Brazil to control sucking and defoliating pests, including the fall armyworm ( Spodoptera frugiperda ), major agricultural pest. However, increasing resistance diamides has raised concerns about long‐term effectiveness of cyantraniliprole. This study aimed (i) assess evolution cyantraniliprole field populations S. , (ii) investigate cross‐resistance other diamides, (iii) analyze role I4790K mutation mechanisms. RESULTS A significant decrease susceptibility was observed Brazil, particularly regions with intensive systems, such as Brazilian Cerrado, from 2017 2023. cyantraniliprole‐resistant strain selected field‐collected population Bahia (BA) using F 2 screening method. The inheritance this autosomal recessive monogenic, 3414‐fold ratio. High flubendiamide, chlorantraniliprole, cyclaniliprole also detected. Molecular analysis confirmed presence homozygous ryanodine receptor gene one mechanisms strain. CONCLUSION These findings highlight decreased accelerating insecticides due cross‐resistance. results underscore urgent need for integrated pest management (IPM) strategies, insecticide rotation monitoring, preserve efficacy insecticides. © 2025 Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf Society Chemical Industry.

Language: Английский

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Identification of entomopathogenic nematodes in Hainan Province, China and their efficacy against Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)

Crop Protection, Journal Year: 2024, Volume and Issue: 184, P. 106838 - 106838

Published: Oct. 1, 2024

Language: Английский

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Identification of Entomopathogenic Nematodes in Hainan Province, China and Their Efficacy Against Spodoptera Frugiperda (Lepidoptera: Noctuidae)

Published: Jan. 1, 2024

The fall armyworm, Spodoptera frugiperda (J. E. Smith)(Lepidoptera: Noctuidae), is a notorious migratory pest native to tropical and subtropical America. It invaded China in 2018 has become major invasivepest on corn. S. can reproduce annually Hainan Province, located southern China, regarded as the central overwintering region of China. Entomopathogenic nematodes (EPNs) are commercialized biocontrol agents against various insect pests. Investigating diversity EPNs using indigenous EPN strains control worthwhile. In present study, 155 soil samples were collected from 22 sites 2021 positive 19 with Galleria-baiting method. Phylogenetic analyses ITS D2D3 expansion 28S rRNA gene performed, belonging Steinernema aciari, sp., Heterorhabditis Oscheius myriophilus O.amsactae identified. was showed that aciari 22000 caused 100% 96% mortality third sixth instar larvae frugiperda, respectively. When pupae exposed 22000, died after emergence. Our study suggests promising agent future.

Language: Английский

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Enhancing >i<Dalbulus maidis>/i< (Hemiptera: Cicadellidae) control: an integrated approach combining >i<Cordyceps javanica>/i< (Ascomycota: Hypocreales) and insecticides

Published: Feb. 23, 2024

Enhancing Dalbulus maidis (Hemiptera: Cicadellidae) control: an integrated approach combining Cordyceps javanica (Ascomycota: Hypocreales) and insecticidesThe corn leafhopper, maidis, stands out as a critical maize pest , damaging the plant by sap extraction, toxic saliva injection, and, above all, transmission of pathogenic agents such stunt spiroplasma (CSS), bushy phytoplasma (MBSP), rayado fino virus (MRFV).Current strategies for controlling this involve application chemical microbial but there is lack information on advantages strategy compared to each treatment alone.In context, project aimed assess virulence aerial conidia, blastospores, submerged conidia (ESALQ 1296) against D. analyze biological compatibility fungus with key insecticides investigate effectiveness insecticides, propose strategic management.To achieve these objectives, assays were conducted adult leafhoppers, along in vitro tests evaluate germination growth after exposure C. insecticides.Finally, performed through insect application.Blastospores proved be most effective exhibiting higher mortality rates shorter LT50 than other propagules.The isolate demonstrated resistance tested spray mixtures.The inclusion Silwet L-77 enhanced some making it usuful component ethiprole.Furthermore, combination ethiprole methomyl exhibited synergistic additive effect, significantly increasing mortality.These findings provide valuable insights developing management, considering microbiological their interaction insecticides.

Language: Английский

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Maize Yield and Quality Response to Lepidoptera Pest Control in Different Periods in South China

Agronomy, Journal Year: 2024, Volume and Issue: 14(12), P. 2938 - 2938

Published: Dec. 10, 2024

Maize is a major cereal crop worldwide, and its stable production essential for national global food security. Pests are among the key factors affecting yield quality of maize. Therefore, it crucial to evaluate recovery losses after implementing control measures against pests during different periods. In this study, we investigated population dynamics main maize in South China assessed treated with effective these The results showed that fall armyworm (FAW), Spodoptera frugiperda, was most severe pest autumn There 10.02% decrease ear weight when no were taken at fourth-leaf stage, there 80.45% 76.09% increases damage index tasseling blister stages, respectively. Additionally, tannin content kernels increased by 26.28% throughout entire growing period. These findings will increase farmers’ knowledge regarding detrimental effects FAW provide theoretical basis reasonable timely pests.

Language: Английский

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