Efficacy of Certain Eco-friendly Pesticides Against Citrus Butterfly, Papilio demoleus

Studies on the efficacy of some eco-friendly new insecticides like novaluron 10 EC, emamectin benzoate 5 SG were undertaken on eggs and 2^nd and 4^th instar larvae of Citrus butterfly Papilio demoleusLinn. under Laboratory conditions along with plant derived insecticide neem (Azadirachtin) 1500 ppm. Chlorpyriphos 20 EC, which is a conventional, recommended and popular insecticide has also been included in the studies. The results indicated that more number of unhatched eggs (94.44%) were recorded with novaluron (0.01%) followed by emamectin benzoate (0.005%), chlorpyriphos (0.04%) and neem 1500 ppm @ 3ml/l of water being the least (61.1%). Three days after imposing the treatments on 4^th instar larvae, novaluron gave 85.0 per cent motality followed by emamectin benzoate (75.0%), chlorpyriphos(65.0%) and neem 1500 ppm (65.0%) in the descending order. Similarly, after 7 days of spraying, novaluron indicated 94.8 per cent mortality followed by emamectin benzoate (84.5%), chlorpyriphos (59.4%) and neem (59.4%).