Bio-efficacy of different novel insecticides and their interaction between numbers of sprays against diamondback moth (Plutella xylostella L.) infesting cabbage

The maximum reduction of diamondback moth larval population over control was observed in spinosad (58.82%) followed by lufenuron (55.18%). The moderately effective group of insecticides for reduction of larval population over control was fipronil (49.46%), emamectin benzoate (43.63%), chlorpyrifos (42.98%), novaluron (42.00%) and indoxacarb (39.34%). Azadirachtin (32.01%) found least effective. Two sprays (42.92%) were found more effective in controlling P. xylostella than single spray (47.93%).