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Publication
Chemical composition and biological activities of Laurus essential oils from different Macaronesian Islands
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Advisor(s)
Abstract(s)
Essential oils (EO) and eight pure components from the fresh leaves of Laurus novocanariensis (LN) from Madeira and of Laurus azorica (LA) from four Azorean Islands (S. Miguel-SMI, S. Maria-SMA, Pico-PIC and S. Jorge-SJO) were evaluated for fumigant and contact insecticidal effects on adult stage of Mediterranean fruit fly (medfly) and for inhibition of oviposition. The chemical composition of EO were analysed by GC/MS. Oxygen-containing mono- and sesquiterpenes (mainly 1,8-cineole) dominated in LN (50%), LA-SMA (88%) and LA-SMI (57%) and mono- and sesquiterpene hydrocarbons (mainly α-pinene) dominated in LA-PIC (61%) and LA-SJO (44%). Linalool and α-terpinyl acetate were also abundant in LA-SMA and trans-cinnamyl acetate in LA-SJO. These three components and all of the Laurus' EO showed high repulsive activity against medfly oviposition. In contact assays on medfly adults, a moderate degree of mortality was observed, being the most toxic samples, in decreasing order, trans-cinnamyl acetate > α-terpinyl acetate > LA-SMI ∼ LA-SMA > LA-SJO ∼ linalool. In fumigant assays, α-terpinyl acetate was the only compound that showed some toxicity on medfly adults. According to the obtained results, the Laurus EO seem promising to be used against medfly oviposition in integrated pest management strategy.
Description
Keywords
Macaronesian Plants Valorization Botanical Pesticides Oxygen-containing Monoterpenes Phenylpropanoids GC/MS Chemical Profile Ceratitis capitata
Citation
Furtado, R., Baptista, J., Lima, E., Paiva, L., Barroso, J. G., Rosa, J. S., & Oliveira, L.. (2014). Chemical composition and biological activities of Laurus essential oils from different Macaronesian Islands. “Biochemical Systematics and Ecology”, 55, 333–341. https://doi.org/10.1016/j.bse.2014.04.004