Efficacy of Some Plant Extracts against Mosquito Larvae

Laboratory bioassay of acetone extract (AE) of some indigenous plants was carried against 3–4^th instar mosquito larvae. Among the plants tested, AE of Sapindus trifoliatus, Balanites roxburghii, Acacia concinna and Citrullus colocynthis were the most effective with LC₅₀ (24 h) values of 0.95, 0.98,1.01 and 1.14 mg mL⁻¹ respectively. The extract of plants like Nerium oleander, Sphaeranthus indicus and Azadirachta indica were the next best treatments. Remaining plants provided moderate activity. It is, therefore, suggested that acetone extract of plants have the potential as larvicides against mosquito.