Larvicidal activity of leaf extracts against anopheles

Abstract

Background Insecticide resistance carries the potential to undermine the efficacy of insecticide based malaria vector control strategies. Therefore, there is an urgent need for new insecticidal compounds. This study was designed to determine the larvicidal effect of leaf extract(Neem, Adhatoda and Aloe vera)against the larvae of anopheles mosquitoes. Anopheles larvae were obtained using a deeper from stagnant water and taken to our lab to further analysis. Samples of Neem, adhatoda and aloe vera were collected. The concentration taken is 0.5mg/ml, 1.0mg/ml, 2.0mg/ml. Mortality of Anopheles larvae depends on these extracts and increase with time of exposure and concentration of extract.2mg/ml recorded the highest mortality rate of 24hours of exposure for anopheles larvae.while 0.5mg/ml recorded minimum mortality after 48hour of exposure. The study demonstrated the potency neem, adhatoda and aloe vera in managing the larvae and thus contributes as an affordable way to control anopheles larvae of mosquitoes.