Insecticidal properties of essential plant oils against the mosquito Culex pipiens molestus (Diptera: Culicidae)

Pest Management Science - Tập 58 Số 5 - Trang 491-495 - 2002
Abdallah F. Traboulsi1, K. Taoubi2, Samih El‐Haj1, J. Bessière3, Salma Rammal1
1Faculty of Agricultural Sciences, Lebanese University, Beirut, Lebanon
2Faculty of Pharmacy, Lebanese University, Beirut, Lebanon
3Ecole Nationale Supérieure de Chimie de Montpellier, Laboratoire de Phytochimie, 8, Rue Ecole Normale, 34296, Montpellier Cedex 05, France

Tóm tắt

Abstract

The insecticidal activities of essential oil extracts from leaves and flowers of aromatic plants against fourth‐instar larvae of the mosquito Culex pipiens molestus Forskal were determined. Extracts of Myrtus communis L were found to be the most toxic, followed by those of Origanum syriacum L, Mentha microcorphylla Koch, Pistacia lentiscus L and Lavandula stoechas L with LC50 values of 16, 36, 39, 70 and 89 mg litre−1, respectively. Over 20 major components were identified in extracts from each plant species. Eight pure components (1,8‐cineole, menthone, linalool, terpineol, carvacrol, thymol, (1S)‐(−)‐α‐pinene and (1R)‐(+)‐α‐pinene) were tested against the larvae. Thymol, carvacrol, (1R)‐(+)‐α‐pinene and (1S)‐(−)‐α‐pinene were the most toxic (LC50 = 36–49 mg litre−1), while menthone, 1,8‐cineole, linalool and terpineol (LC50 = 156–194 mg litre−1) were less toxic.

© 2002 Society of Chemical Industry

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Pest Management Science

Tập 58 Số 5

491-495

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