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<p>This study assessed the bioinsecticidal activity of <i>Artemisia campestris L</i>. essential oil (EO) in both free and nanoemulsified forms. The EO, obtained via hydrodistillation, was analyzed using GC/EIMS and found to contain high levels of monoterpene hydrocarbons, particularly α-pinene (21.0%), myrcene (14.7%), and (Z)-β-ocimene (12.7%). Bioassays targeting <i>Tribolium castaneum</i> evaluated antifeedant, toxic, and repellent effects using three concentrations (0.04%, 0.2%, and 0.4%). Results indicated that both forms exhibited significant antifeedant and toxic effects, with the nanoemulsified EO (NEEO) showing higher toxicity levels, particularly 70% against larvae at 0.4%. NEEO demonstrated the lowest LC<sub>50</sub> values across all insect stages, with 0.506% vs. 0.780% for adults, 0.281% vs. 0.728% for larvae, and 0.220% vs. 0.538% for pupae. Additionally, NEEO provided a better repellent effect against adults, achieving an inhibition ratio below 1 at all concentrations. These preliminary findings indicate that NEEO <i>A. campestris</i> may represent a promising eco-friendly approach for managing stored-product pests, although further investigations are needed to confirm its efficacy under different conditions.</p>

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Bioinsecticidal activity and efficacy of nanoemulsified Artemisia Campestris essential oil against Tribolium castaneum (Herbst, 1797) (Coleoptera: Tenebrionidae)

  • 期刊论文

  • 发表日期：

    2025年11月8日

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  • Dalila Haouas,
  • Mohamed Ali Lassoued,
  • Khaoula Toumi,
  • Guido Flamini

摘要

This study assessed the bioinsecticidal activity of Artemisia campestris L. essential oil (EO) in both free and nanoemulsified forms. The EO, obtained via hydrodistillation, was analyzed using GC/EIMS and found to contain high levels of monoterpene hydrocarbons, particularly α-pinene (21.0%), myrcene (14.7%), and (Z)-β-ocimene (12.7%). Bioassays targeting Tribolium castaneum evaluated antifeedant, toxic, and repellent effects using three concentrations (0.04%, 0.2%, and 0.4%). Results indicated that both forms exhibited significant antifeedant and toxic effects, with the nanoemulsified EO (NEEO) showing higher toxicity levels, particularly 70% against larvae at 0.4%. NEEO demonstrated the lowest LC50 values across all insect stages, with 0.506% vs. 0.780% for adults, 0.281% vs. 0.728% for larvae, and 0.220% vs. 0.538% for pupae. Additionally, NEEO provided a better repellent effect against adults, achieving an inhibition ratio below 1 at all concentrations. These preliminary findings indicate that NEEO A. campestris may represent a promising eco-friendly approach for managing stored-product pests, although further investigations are needed to confirm its efficacy under different conditions.