Stimulation of vitellogenin gene expression by permethrin in the brown planthopper, <i>Nilaparvata lugens</i> (Hemiptera: Auchenorrhyncha: Delphacidae)

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  • Khaeso Kanjana
    Department of Applied Biological Sciences, Saga University Department of Entomology, Faculty of Agriculture, Khon Kaen University
  • Matsumoto Hitoshi
    Department of Applied Biological Sciences, Saga University
  • Hayakawa Yoichi
    Department of Applied Biological Sciences, Saga University
  • Tojo Sumio
    Department of Applied Biological Sciences, Saga University

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  • トビイロウンカにおけるパルメトリンによるビテロジェニン遺伝子発現の活性化
  • Stimulation of vitellogenin gene expression by permethrin in the brown planthopper, Nilaparvata lugens (Hemiptera: Auchenorrhyncha: Delphacidae)

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Abstract

We investigated permethrin effects on female adults of Nilaparvata lugens using a line with long wings, which initiated ovarian development one day after adult emergence. Vitellogenin gene (Vg) expression was significantly enhanced in the adults 1 day after topical application of 10 ng or more of permethrin per individual at 0-day-old adulthood. Similar triggering action of the expression was observed by application of juvenile hormone (JH) III, but such actions were blocked by application together with precocene II, an antagonist of the JH. Enhanced Vg expression and earlier oviposition were found in adults of the next generation when adults of the preceding generation were treated with permethrin. These results strongly indicate that permethrin functions initially to induce JH III synthesis in adults before initiating ovarian development in the females, which triggers Vg expression, finally rendering the treated adults with earlier oviposition, even of the next generation, relating to resurgence.

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