Abstract
AbstractPlants are a prospective source of novel natural insect repellents and botanical insecticides. This study was conducted to investigate the chemical composition of the essential oils of three plants growing in Saudi Arabia, namelyDucrosia anethifolia,Achillea fragrantissima, andTeucrium polium; and to evaluate their potential mosquitocidal and repellent activities against adult femaleCulex pipiensL. The main components of the three oils were found to be decanal (28.9%) and chrysanthenyl acetate (10.04%), (D. anethifolia); sabinyl acetate (35.79) and artemesia ketone (18.28%) (A. fragrantissima);α‐cadinol (49.53%) andδ‐cadinene (10.23%) (T. polium). The oil ofA. fragrantissimawas the most toxic (LC50 = 0.11 μL/L air) followed byD. anethifoliaandT. poliumwith LC50values of 5.22 and 25.98 μL/L air, respectively.T. poliumoil was the most repellent (292 min at 2 μL/cm2), followed byD. anethifoliaandA. fragrantissima. The results indicate that the essential oils have a potential fumigant insecticidal and repellent activities for mosquito control.
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