Larvicidal efficacy of Azadirachta indica against Anopheles mosquito larvae

The aim of this study was to test the larvicidal efficacy of stem and leaf extracts of Azadirachta indica on Anopheles mosquito larvae. Leaf and stem of A.indica were pulverized and sieved. The sieved stem and leaf were extracted with methanol and water respectively and evaporated in a Rotary evaporator. The extracts were tested against Anopheles mosquito larvae in 24 hours each in replicate of 24 to 100mg/l,150mg/l,200mg/l and 250mg/l. The percentage mortality of methanol extract of stem bark at 86.6%at 250mg/lwhile methanol extract of leaf was96.5% at 250mg/l. The LC50 of the methanol leave was the lowest at 1.031mgl-1 and LC90 of 3.56mgl-1 with a relatively more toxic characteristic. This shows that A. indica has high mortality potentials on the larvae of Anopheles mosquito and hence can be used to control malaria vectors.