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Purpose : To investigate the chemical composition and insecticidal activity of the essential oil of the aerial parts of Artemisia frigida against maize weevils ( Sitophilus zeamais ) and booklice ( Liposcelis bostrychophila )D Methods : Steam distillation of A. frigida aerial parts was carried out in a Clavenger apparatus to extract its volatile oil content. Gas  chromatography/mass spectrometric (GC/MS) analyses (HP-5MS column) of the essential oil were performed and its contact toxicity was determined using topical application and filter paper impregnation technique while its fumigant toxicity was evaluated using sealed-space method. Results : A total of 32 components of the essential oil were identified. The principal compounds were cis-ρ-menth-2-en-1-ol (20.8%), 1,8-cineole (12.0%), borneol (10.2%), lavandulol (9.3%), camphor (6.9%), and bicyclogermacrene (5.5%). The oil exhibited contact toxicity against adult S. zeamais and L. bostrychophila with LC 50 value of 17.97 µg/adult and 254.38 µg/cm2, respectively. The essential oils also possessed fumigant toxicity against S. zeamais and L. bostrychophila with LC 50 value of 69.46 mg/L and 1.25 mg/L air. Conclusion : The study indicates that the essential oil of A. frigida has a potential to be developed to a natural fumigant/insecticide for the control of grain storage insects. Keywords : Artemisia frigida, Sitophilus zeamais, Liposcelis bostrychophila, Insecticidal activity, Essential oil, Cis-ρ-Menth-2-en-1-ol; 1,8-Cineole

tropical journal of pharmaceutical research

Chemical Composition and Insecticidal Activity of Essential Oil of &lt;i&gt;Artemisia frigida&lt;/i&gt; Willd (Compositae) against Two Grain Storage Insects