Larvicidal activity of fatty acid methyl esters of Vitex species against Culex quinquefasciatus.
The larvicidal activity of fatty acid methyl ester (FAME) extracts of Vitex altissima, Vitex negundo and Vitex trifolia was studied against early fourth-instar larvae of Culex quinquefasciatus. The fatty composition was analysed by gas chromatography. The highest percentage of lauric acid, palmitic acid, stearic acid, oleic acid and linolenic acid were recorded in V. negundo. The highest percentage of linolenic acid was recorded in V. trifolia. The FAME extract of V. trifolia showed the highest larvicidal activity with an LC50 value of 9.25 ppm followed by V. altissima (14.82 ppm) and V. negundo (18.64 ppm).
Kannathasan
Krishnan
K
Department of Botany, Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India.
Senthilkumar
Annadurai
A
Venkatesalu
Venugopalan
V
Chandrasekaran
Manivachagam
M
D000818:Animals; D003465:Culex / Q000187:drug effects*; D005227:Fatty Acids / Q000302:isolation & purification / Q000494:pharmacology*; D020128:Inhibitory Concentration 50; D007306:Insecticides / Q000302:isolation & purification / Q000494:pharmacology*; D007814:Larva / Q000187:drug effects*; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology*; D016019:Survival Analysis; D020950:Vitex / Q000737:chemistry*
D005227:Fatty Acids; D007306:Insecticides; D010936:Plant Extracts