Larvaecidal effects of aqueous extracts of Azadirachta indica (neem) on the larvae of Anopheles mosquito

Abstract

The effect of crude aqueous extracts of Azadirachta indica (neem) against the larvae of Anopheles 
mosquito was investigated. Exposure of the larvae to undiluted extracts of seed oil, leaf and bark for 
12 hours led to 100, 98, and 48% mortality, respectively. Dilution of these extracts also resulted in 
mortality of the larvae. We suggest that the seed oil and leaf extract of neem contain properties that 
could be developed and used in the control of mosquitoes in the tropics.