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<p>The mirid bug <i>Helopeltis&#xa0;bakeri</i>&#xa0;Poppius feeds on a wide range of host plants including economically important crops, like cocoa (<i>Theobroma cacao</i>) and sweetpotato (<i>Ipomea batatas</i>), yet little is known about its complex interactions with its host plants. Here, we assessed the response of sweetpotato to feeding by <i>H. bakeri</i>. Headspace volatiles from healthy and infested sweetpotato cuttings were collected and compared. Feeding resulted in the production of a new headspace constituent, the terpene squalene, and an increase in the emission of other volatiles, including several terpenes and terpenoids and a green leaf volatile [(<i>Z</i>)-3-hexenyl acetate]. Electroantennographic and behavioral analyses confirmed that squalene is not electrophysiologically and behaviorally active toward <i>H. bakeri</i>, which suggests that squalene might have other ecological functions. The results provide important baseline information on the interactions of <i>H. bakeri</i> with its host plant, but the role of these volatile compounds in multitrophic interactions cannot be assessed yet since the natural enemies (e.g., parasitoids) of <i>H. bakeri</i> have not yet been identified.</p> Graphical Abstract <p></p>

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Feeding by the mirid bug Helopeltis bakeri Poppius alters the emission of host plant volatiles

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • Maria Criselda V. Dela Cruz,
  • Mary Angelique A. Tavera,
  • Kris Lord T. Santos,
  • Anna Karen C. Laserna,
  • Kozo Watanabe,
  • Divina M. Amalin,
  • Jose Isagani B. Janairo

摘要

The mirid bug Helopeltis bakeri Poppius feeds on a wide range of host plants including economically important crops, like cocoa (Theobroma cacao) and sweetpotato (Ipomea batatas), yet little is known about its complex interactions with its host plants. Here, we assessed the response of sweetpotato to feeding by H. bakeri. Headspace volatiles from healthy and infested sweetpotato cuttings were collected and compared. Feeding resulted in the production of a new headspace constituent, the terpene squalene, and an increase in the emission of other volatiles, including several terpenes and terpenoids and a green leaf volatile [(Z)-3-hexenyl acetate]. Electroantennographic and behavioral analyses confirmed that squalene is not electrophysiologically and behaviorally active toward H. bakeri, which suggests that squalene might have other ecological functions. The results provide important baseline information on the interactions of H. bakeri with its host plant, but the role of these volatile compounds in multitrophic interactions cannot be assessed yet since the natural enemies (e.g., parasitoids) of H. bakeri have not yet been identified.

Graphical Abstract