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Hormetic effects of thiamethoxam on Schizaphis graminum: demographics and feeding behavior.
Gul, Hina; Haq, Ihsan Ul; Ullah, Farman; Khan, Shanza; Yaseen, Aqsa; Tariq, Kaleem; Güncan, Ali; Desneux, Nicolas; Liu, Xiaoxia.
Afiliação
  • Gul H; MARA Key Laboratory of Pest Monitoring and Green Management, Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193, China.
  • Haq IU; Insect Pest Management Program, Institute of Plant and Environmental Protection, National Agricultural Research Centre, Islamabad, Pakistan.
  • Ullah F; Insect Pest Management Program, Institute of Plant and Environmental Protection, National Agricultural Research Centre, Islamabad, Pakistan.
  • Khan S; State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
  • Yaseen A; Insect Pest Management Program, Institute of Plant and Environmental Protection, National Agricultural Research Centre, Islamabad, Pakistan.
  • Tariq K; Insect Pest Management Program, Institute of Plant and Environmental Protection, National Agricultural Research Centre, Islamabad, Pakistan.
  • Güncan A; Department of Entomology, Abdul Wali Khan University Mardan, Mardan, Khyber Pakhtunkhwa, Pakistan.
  • Desneux N; Department of Plant Protection, Faculty of Agriculture, Ordu University, 52200, Ordu, Turkey. guncan.ali@gmail.com.
  • Liu X; Université Côte d'Azur, INRAE, UMR ISA, 06000, Nice, France.
Ecotoxicology ; 33(3): 253-265, 2024 Apr.
Article em En | MEDLINE | ID: mdl-38468020
ABSTRACT
In agroecosystems, insects contend with chemical insecticides often encountered at sublethal concentrations. Insects' exposure to these mild stresses may induce hormetic effects, which has consequences for managing insect pests. In this study, we used an electrical penetration graph (EPG) technique to investigate the feeding behavior and an age-stage, two-sex life table approach to estimate the sublethal effects of thiamethoxam on greenbug, Schizaphis graminum. The LC5 and LC10 of thiamethoxam significantly decreased longevity and fecundity of directly exposed adult aphids (F0). However, the adult longevity, fecundity, and reproductive days (RPd)-indicating the number of days in which the females produce offspring - in the progeny generation (F1) exhibited significant increase when parental aphids (F0) were treated with LC5 of the active ingredient. Subsequently, key demographic parameters such as intrinsic rate of increase (r) and net reproductive rate (R0) significantly increased at LC5 treatment. EPG recordings showed that total durations of non-probing (Np), intercellular stylet pathway (C), and salivary secretion into the sieve element (E1) were significantly increased, while mean duration of probing (Pr) and total duration of phloem sap ingestion and concurrent salivation (E2) were decreased in F0 adults exposed to LC5 and LC10. Interestingly, in the F1 generation, total duration of Np was significantly decreased while total duration of E2 was increased in LC5 treatment. Taken together, our results showed that an LC5 of thiamethoxam induces intergenerational hormetic effects on the demographic parameters and feeding behavior of F1 individuals of S. graminum. These findings have important implications on chemical control against S. graminum and highlight the need for a deeper understanding of the ecological consequences of such exposures within pest management strategies across the agricultural landscapes.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Limite: Animals / Female / Humans Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Limite: Animals / Female / Humans Idioma: En Ano de publicação: 2024 Tipo de documento: Article