Objective:To investigate the larvicidal and repellent properties of essential oils from various parts of four plant speciesCymbopogan citrates, Cinnamomum zeylanicum, Rosmarinus officinalis andZingiber officinale againstCulex tritaeniorhynchus (Cx. tritaeniorhynchus)and Anopheles subpictus (An. subpictus).Methods: Essential oils were obtained by hydro-distillation method. The mosquitoes were reared in the vector control laboratory and twenty five late third instar larvae ofCx. tritaeniorhynchus andAn. subpictus were exposed to based on the wide range and narrow range test, essential oil tested at various concentrations ranging from25 to 250 ppm. The larval mortality was observed after 24 h under the laboratory conditions. The repellent efficacy was determined against two mosquito species at three concentrations viz., 1.0,2.5 and5.0 mg/cm2 under laboratory conditions.Results:Results showed all the four plant essential oil produced significant larval mortality against two mosquito species. However, the highest larvicidal activity was observed in the essential oil fromZingiber officinale againstCx. tritaeniorhynchus andAn. subpictus with theLC50 andLC90 values as98.83, 57.98 ppm and186.55, 104.23 ppm, respectively. All the four essential oil shows significant repellency againstCx. tritaeniorhynchus thanAn. subpictus. Among four essential oil tested the highest repellency was observed inZingiber officinale, a higher concentration of5.0 mg/cm2 provided100% protection up to150 and180 min againstCx. tritaeniorhynchus andAn. subpictus, respectively.Conclusions:In this work, it can be concluded that four essential oils which were distilled fromCymbopogan citrates, Cinnamomum zeylanicum, Rosmarinus officinalis andZingiber officinale showed promising larvicidal and repellent agent againstCx. tritaeniorhynchus andAn. subpictus.