Larvicidal activity of plant extracts used alone and in combination with known synthetic larvicidal agents against <i>Aedes aegypti</i>

Abstract

Larvicidal activity of acetone and petroleum ether extracts of four plants <i>Murraya koenigii, Coriandrum sativwn</i>,<i> Ferula asafoetida</i>,<i> Trigonella foenum graceum </i>and synthetic larvicides Fenthion and Temephos used alone and in<i> </i>combination was carried out against <i>A. aegypti </i>larvae under laboratory conditions. Optimum values were found out by using<i> </i>different concentrations of each plant (ranged 25ppm-900ppm) and both synthetic larvicides (ranged 0.01-7.5ppm). The<i> </i>synergistic study was carried out by using 0.05ppm of Temephos and Fenthion with 25ppm of <i>M. koenigii, F. Asaferida, T. foenum graceum </i>and 100 ppm of <i>C</i>. <i>sativum. </i>All the plants showed potential synergistic activity although showed<i> </i>comparatively poor larvicidal activity when tested individually.