M Govindarajan1, R Sivakumar, A Amsath, S Niraimathi. 1. Division of Vector Biology and phytochemistry, Department of Zoology, Annamalai University, Annamalainagar-608 002, India. drgovind1979@rediffmail.com
Abstract
OBJECTIVE: To determine the larvicidal efficacy of different solvent leaf extract of Ficus benghalensis (F. benghalensis) against Culex tritaeniorhynchus (Cx. tritaeniorhynchus) and Anopheles subpictus (An. subpictus). METHODS: Twenty five early third instar larvae of Cx. tritaeniorhynchus and An. subpictus were exposed to various concentrations and were assayed in the laboratory by using the protocol of WHO 2005. The larval mortality was observed after 24 h of treatment. RESULTS: Among three solvent extracts tested the maximum efficacy was observed in the methanol extract. The LC(50) and LC(90) values of F. benghalensis against early third instar of Cx. tritaeniorhynchus and An. subpictus were 100.88, 159.76 ppm and 56.66, 85.84 ppm, respectively. No mortality was observed in controls. The chi-square values were significant at P<0.05 level. CONCLUSIONS: From the results it can be concluded the crude extract of F. benghalensis was an excellent potential for controlling Cx. tritaeniorhynchus and An. subpictus mosquito larvae.
OBJECTIVE: To determine the larvicidal efficacy of different solvent leaf extract of Ficus benghalensis (F. benghalensis) against Culex tritaeniorhynchus (Cx. tritaeniorhynchus) and Anopheles subpictus (An. subpictus). METHODS: Twenty five early third instar larvae of Cx. tritaeniorhynchus and An. subpictus were exposed to various concentrations and were assayed in the laboratory by using the protocol of WHO 2005. The larval mortality was observed after 24 h of treatment. RESULTS: Among three solvent extracts tested the maximum efficacy was observed in the methanol extract. The LC(50) and LC(90) values of F. benghalensis against early third instar of Cx. tritaeniorhynchus and An. subpictus were 100.88, 159.76 ppm and 56.66, 85.84 ppm, respectively. No mortality was observed in controls. The chi-square values were significant at P<0.05 level. CONCLUSIONS: From the results it can be concluded the crude extract of F. benghalensis was an excellent potential for controlling Cx. tritaeniorhynchus and An. subpictus mosquito larvae.