Abstract
Present study reports the chemical composition and the contact toxicity of Lavender derived essential oil and its effects on the biochemical composition (carbohydrates, lipids, ad proteins) and the antioxidant enzymes (SOD, CAT and GPx) in adults of Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae). Chemical composition analysed by gas chromatography-mass spectrometry (GC-MS) showed that Linalool (20.48%) and linalyl acetate (13.24%) were the major compounds. The EO exhibit contact toxicity against Rhyzopertha dominica, with dose-response relationship. Moreover, EO of L. angustifolia induce a decrease of the lipid, protein and carbohydrate contents in adults. Biomarkers determined in adults treated with LC25 and LC50 revealed an induction of the detoxification system via an increase in activity of Catalase and Superoxyde dismutase and no effect on GPx activity. L. angustifolia essential oil could be considered as alternative to chemical insecticides for pest control.
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