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Development of pest control methods using the decision-making mechanism of ants towards mutualists

Research Project

Project/Area Number 20K15534
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 39040:Plant protection science-related
Research InstitutionNational Agriculture and Food Research Organization

Principal Investigator

Hayashi Masayuki  国立研究開発法人農業・食品産業技術総合研究機構, 植物防疫研究部門, 主任研究員 (80837609)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords土着天敵 / アリ / アブラムシ / 相利共生 / 炭化水素 / 糖 / 学習 / 甘露 / 共生 / 天敵 / 害虫防除 / 相互作用
Outline of Research at the Start

本研究の目的は、アリの共生者に対する学習行動を操作し、土着天敵としての機能を人為的に引き出す害虫防除法を開発することである。アリは農生態系における強力な捕食者であり、多くの害虫密度を低下させる。その一方、アブラムシなどの甘露排出昆虫を保護し、他の土着天敵の活動を抑制してしまう。本研究では、アリの甘露排出昆虫に対する意思決定機構を利用し、アリの保護を中断させ天敵としての機能を強化する手法を構築する。

Outline of Final Research Achievements

The aim of this study was to construct a pest control method that artificially elicits the function of ants as natural enemy by modifying their learning behavior toward their mutualists. Field surveys, behavioral experiments, and chemical analyses were conducted to elucidate the mutualist recognition and ant preference toward mutualistic aphids. Our results showed that workers of Tetramorium tsushimae ants distinguish between methylalkanes, which are included in cuticular hydrocarbons possessed by aphids that differ in the position of the methyl branch. Mutualistic aphid species tend to have more complex hydrocarbon compositions and higher methyl-alkane ratios in cuticular hydrocarbons. The results also suggest that ants prefer aphid species that produce honeydew containing trisaccharides.

Academic Significance and Societal Importance of the Research Achievements

環境の持続可能性の観点などから、土着天敵などの在来資源を積極的に活用する生物的防除法の発展が期待されている。アリは多様な環境に生息するジェネラリスト捕食者であるため、土着天敵利用の有力候補だが、アブラムシなどの重要害虫と共生関係を構築してしまうという大きな欠点をもつ。本研究では、さまざまなアブラムシ種について、甘露に含まれる糖成分と匂い成分(体表炭化水素)を解析した。また、アリの炭化水素識別能を評価した。これらの結果は、アリの行動改変による害虫密度抑制技術を開発する上で重要な知見である。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (3 results)

All 2023 2022 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results)

  • [Journal Article] First record of the green lacewing <i>Plesiochrysa ramburi</i> (Schneider, 1851) (Neuroptera: Chrysopidae) in Japan, and its development under culture conditions2023

    • Author(s)
      Masayuki Hayashi
    • Journal Title

      Japanese Journal of Entomology (New Series)

      Volume: 26 Issue: 2 Pages: 120-123

    • DOI

      10.20848/kontyu.26.2_120

    • ISSN
      1343-8794, 2432-0269
    • Year and Date
      2023-06-25
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Aphid DNA detection by molecular gut content analysis in a natural enemy consuming honeydew2022

    • Author(s)
      Owashi Yuta、Hayashi Masayuki
    • Journal Title

      Journal of Applied Entomology

      Volume: 146 Issue: 8 Pages: 1036-1040

    • DOI

      10.1111/jen.13041

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Estimation of movement from insectary plants to crop plants in Orius bugs (Heteroptera: Anthocoridae) by molecular gut content analysis2020

    • Author(s)
      Hayashi Masayuki、Abe Junichiro、Owashi Yuta、Miura Kazuki
    • Journal Title

      Applied Entomology and Zoology

      Volume: 55 Issue: 3 Pages: 361-365

    • DOI

      10.1007/s13355-020-00692-9

    • NAID

      40022307305

    • Related Report
      2020 Research-status Report
    • Peer Reviewed

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Published: 2020-04-28   Modified: 2025-01-30  

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