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Mosquito larvicidal activity of Coriandrum sativum and Brassica nigra seed extract against the Filarial vector, Culex quinquefasciatus Say

Deepika Thangaraj, Ramanibai Ravichandran and Madhavarani Alwarsamy

To determine the larvicidal activity of different solvent of seed extracts of Coriandrum sativum (C.sativum) and Brassica nigra (B.nigra) against filariasis vector Culex quinquefasciatus (C.quinquefasciatus). Larvicidal efficacy of the crude seed extracts of Coriandrum sativum and Brassica nigra with five different solvents like acetone, ethyl acetate, methanol, ethanol and chloroform was tested against the mosquito larvae of C.quinquefasciatus. The mortality was observed after 24 h under laboratory conditions. Among the tested solvents the maximum efficacy was observed in the acetone extract and methanol extract. The LC50 and LC90 values of C.sativum were found to be 14.994 and 66.970 and B.nigra was found to be 322.297 and 8883.465. The Chi-square values were significant at P<0.05 level. From the investigations it was concluded that the crude extract of Coriandrum sativum and Brassica nigra showed an excellent potential for controlling the larval instars of C.quinquefasciatus.