Algerian Thymus vulgaris essential oil: chemical composition and larvicidal activity against the mosquito Culex pipiens
Author(s): Nadia Bouguerra, Fouzia Tine Djebbar and Noureddine Soltani
Abstract: The objective of the present study was to assess the chemical composition of the essential oil extracted from Thymus vulgaris leaves and their larvicidal activity against fourth instar larvae of Culex pipiens, the most abundant mosquito species in Tebessa area (North east Algeria). The essential oil yield of the plant was 1.58 %. The GC/MS analyzes revealed eighteen compounds in essential oil of T. vulgaris. The major chemical component identified was linalool (82.88 %). The dominant monoterpene fraction (98.48 %), contains oxygenated monoterpenes (94.31%) and monoterpene hydrocarbons (4.17%). Sesquiterpenes and secondary alcohol represents only 2.05% and 0.24%, respectively. In a second series of experiments, the larvicidal activities of T. vulgaris essential oil was evaluated against fourth instar of Cx pipiens at different concentrations (25, 50, 100, 150 and 200 ppm). The LC50 values obtained at 24, 48 and 72 hours after treatment were 72.04, 68.61, 62.12ppm respectively, and the LC90 values were 207.01, 190.54 and 169.82, respectively. The results obtained show that this plant material exhibited significant activity and could be considered as potent natural larvicidal agent against Cx pipiens.
Efficacy of thymus vulgaris
essential oil against fourth instar larvae of Cx pipiens
How to cite this article:
Nadia Bouguerra, Fouzia Tine Djebbar, Noureddine Soltani. Algerian Thymus vulgaris essential oil: chemical composition and larvicidal activity against the mosquito Culex pipiens. Int J Mosq Res 2017;4(1):37-42.