| Savarimuthu Ignacimuthu | 1 Article |
<b>Objectives</b><br/>
To evaluate the ovicidal and oviposition deterrent activities of five medicinal plant extracts namely <i>Aegle marmelos</i> (Linn.), <i>Limonia acidissima</i> (Linn.), <i>Sphaeranthus indicus</i> (Linn.), <i>Sphaeranthus amaranthoides</i> (burm.f), and <i>Chromolaena odorata</i> (Linn.) against <i>Culex quinquefasciatus</i> and <i>Aedes aegypti</i> mosquitoes. Three solvents, namely hexane, ethyl acetate, and methanol, were used for the preparation of extracts from each plant.<br/><b>Methods</b><br/>
Four different concentrations—62.5 parts per million (ppm), 125 ppm, 250 ppm, and 500 ppm—were prepared using acetone and tested for ovicidal and oviposition deterrent activities. One-way analysis of variance (ANOVA) was used to determine the significance of the treatments and means were separated by Tukey's test of comparison.<br/><b>Results</b><br/>
Among the different extracts of the five plants screened, the hexane extract of <i>L. acidissima</i> recorded the highest ovicidal activity of 79.2% and 60% at 500 ppm concentration against the eggs of <i>Cx. quinquefasciatus</i> and <i>Ae. aegypti</i>, respectively. Similarly, the same hexane extract of <i>L. acidissima</i> showed 100% oviposition deterrent activity at all the tested concentrations against <i>Cx. quinquefasciatus</i> and <i>Ae. aegypti</i> adult females.<br/><b>Conclusion</b><br/>
It is concluded that the hexane extract of <i>L. acidissima</i> could be used in an integrated mosquito management program.
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