Efficacy of Some Insecticides Against Whitefly, Bemisia tabaci (Gennadius) and Thrips Caliothrips indicus (Bagnall) on Field Pea under Field Conditions

Among the different insecticides evaluated on field pea during Rabi, 2012 under field conditions acetamiprid 0.004, clothianidin 0.025 and imidacloprid 0.005% proved most effective; and azadirachtin 0.0006, neem oil 0.5 and triazophos 0.04% proved less effective treatments against whitefly. All insecticides exhibited fairly effective against thrips, whereas imidacloprid 0.005, thiamethoxam0.008, clothianidin 0.025 andacephate 0.075% proved most effective treatments. The highest grain yield was recorded in the treatment of imidacloprid (811.1kg/ha), closely followed by clothianidin, acetamiprid and thiamethoxam. Among various insecticides tested acetamiprid proved to be the most effective and economical treatment with the highest protection cost: benefit ratio (PCBR) (1: 20.36), followed by imidacloprid (1: 18.91) dichlorvos (1: 9.55), thiamethoxam (1: 8.39), triazophos (1: 7.96) and acephate (1: 6.80).