Identification of the compounds responsible for oviposition inhibitory effect in locust fecal extracts

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H02201
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 39050:Insect science-related
• Research Institution: Hirosaki University
• Principal Investigator: Sugahara Ryohei 弘前大学, 農学生命科学部, 助教 (40773346)
• Co-Investigator(Kenkyū-buntansha): 清水 伸泰 京都先端科学大学, バイオ環境学部, 教授 (30434658) ; 石丸 幹二 佐賀大学, 農学部, 教授 (40223028) ; 徳田 誠 佐賀大学, 農学部, 教授 (60469848) ; 田中 良明 国立研究開発法人農業・食品産業技術総合研究機構, 生物機能利用研究部門, グループ長 (90355735)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: トノサマバッタ / フン / 産卵抑制 / 殺卵

Outline of Final Research Achievements

Locust fecal extracts have been reported to inhibit oviposition and embryogenesis in locusts. We investigated whether these extracts also inhibit oviposition in other insect species and if soaking eggs of other insects in the extracts inhibits embryogenesis. Furthermore, we fractionated the fecal extracts to identify which fractions exhibited inhibitory activity. Our findings indicated that the effects on oviposition and embryogenesis varied among different insect species. Additionally, the inhibitory activities of the extracts were influenced by the plant species consumed by the locusts. The fractionation process successfully isolated the active compounds, and the components of each fraction were identified.

Free Research Field

昆虫学

Academic Significance and Societal Importance of the Research Achievements

バッタのフンには卵にとって有害な物質が含まれ、それをメス親が忌避している現象は生物学的に興味深い。その活性の有無を別種の昆虫で調べることで、その効果が広く見られる現象なのかを検証した。また、その活性を示す成分が特定できれば、卵のステージで殺虫効果を示す薬剤の開発や、害虫に対して産卵の管理を行う方法を開発できるかもしれない。