MOSQUITO OVICIDAL AND REPELLENT PROPERTIES OF CHROZOPHORA ROTTLERI (EUPHORBIACEAE) AGAINST ANOPHELES STEPHENSI, AEDES AEGYPTI AND CULEX QUINQUEFASCIATUS (DIPTERA: CULICIDAE)

Present study, we evaluated the larvicidal and repellent activities of Chrozophora rottleri (Family: Euphorbiaceae) extract against Culex quinquefasciatus, Aedes aegypti and Anopheles stephensi. The ovicidal activity was determined against three mosquito species to various concentrations ranging from 50-300 ppm under the laboratory conditions. The hatch rates were assessed 48 h post treatment. The repellent efficacy was determined against three mosquito species at three concentrations viz., 1.0, 2.5 and 5.0 mg/cm2 under the laboratory conditions. Among five solvent extracts tested, the methanol extract have most promising ovicidal activity. The methanol extract exerted zero hatchability (100% mortality) at 150 ppm for Cx. quinquefasciatus, Ae. aegypti and An. stephensi. The methanol extract of C. rottleri found to be more repellency than the other extracts. A higher concentration of 5.0 mg/cm2 provided 100% protection up to 300 min against Cx. quinquefasciatus and 250 min against Ae. aegypti and An. stephensi, respectively. The results clearly show that repellent activity was dose dependent. From the results it can be concluded the crude extract of C. rottleri was an excellent potential for controlling Cx. quinquefasciatus, Ae. aegypti and An. stephensi mosquitoes