Larvicidal efficacy of Vernonia cinerea (L.) (Asteraceae) leaf extracts against the filarial vector Culex quinquefasciatus Say (Diptera: Culicidae)
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چکیده
The larvicidal efficacy of Vernonia cinerea leaf extracts against the common filarial vector, Culex quinquefasciatus was determined. Ground Vernonia cinerea leaves were sequentially extracted with ethyl acetate, chloroform, acetone and methanol. A series of concentrations of the extracts ranging from 0.05 – 2 mg/ml were tested against third instar larvae using WHO protocol and their percentage mortalities, LC50 values were determined. The ethyl acetate leaf extract of Vernonia cinerea was found to be effective with an LC50 value of 1.63 mg/ml after 24 hr. Application of these extracts to larval habits may lead to promising results in filarial and mosquito management programmes.
منابع مشابه
Larvicidal Efficacy of Strychnos nuxvomica Linn. (Loganiaceae) Leaf Extracts Against the Filarial Vector Culex quinquefasciatus Say (Diptera: Culicidae)
The larvicidal activity of hexane, chloroform and ethyl acetate leaf extracts of Strychnos nuxvomica against the third instar larvae of Culex quinquefasciatus was studied. The ethyl acetate leaf extract was found to be the effective larvicide with LC value of 222.28 and 146.99 ppm after 24 and 48 hours. The results indicate 50 promising larvicidal activity against Culex quinquefasciatus. Furthe...
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