GC-MS ANALYSIS OF OIL FROM LAVANDULA LATIFOLIA L. AND ITS REPELLENT ACTIVITY AGAINST MOSQUITO

Mosquitoes are one of the important vectors of various diseases. Repellent activity significantly reduces contact with disease-transmitting mosquitoes. Essential oils have repellent activity that is being potentially developed as an alternative to commercial chemical pesticides. In this study, Lavandula angustifolia was used to evaluate its repellent activity against Ae. Aegypti. The repellent activity of L. angustifolia oil was tested with the 100, 200, 300, 400, and 500 ppm concentrations against the adult mosquitoes of Ae. Aegypti. L. angustifolia showed 100% protection up to 150 minutes against the bite of Ae. aegypti. After that, the repellency was found reduced by the increased exposure periods against Ae. Aegypti. The presence of phytochemicals in oils could be responsible for different mosquitocidal agents. Lavender oil was subjected to GC-MS analysis. It showed the presence of  37 compounds, including, 1R-à-Pinene, Bicyclo[2.2.1]heptane, 2,2-dimethyl-5methylene-, Tricyclo[2.2.1.0 (2,6)]heptane, 1,7,7-trimethyl-, Ocimene, Camphene, á-Pinene, Cyclohexene, 4-methylene-1-(1-methylethyl)-, Eucalyptol, 1,4-Cyclohexadiene, 1-methyl-4-(1-methylethyl)-, Bicyclo [2.2.1]heptan-2-one, 1,3,3-trimethyl-, 3-Oxatricyclo[4.1.1.0(2,4)] octane, 2,7,7trimethyl-, Acetaldehyde, (3,3-dimethylcyclohexylidene)-, (E)-, Bicyclo[2.2.1]heptan-2-one, 1,7,7-trimethyl-, (1S)-, Isoborneol, Borneol, Cyclohexanol, 1-methyl-4-(1-methylethylidene)-, Tetra-cyclo[6.3.2.0(2,5).0(1,8)]tridecan-9-ol, 4,4-dimethyl-, 1,6,10,14-Hexadecatetraen-3-ol, 3,7,11,15-tetramethyl-, (E,E)- and 13-Hexyloxacyclotridec-10-en-2-one.