MAHAVEER KUMAWAT, U. S. SHARMA, JHUMAR LAL AND RAJENDRA NAGAR

The experiment on relative bio-efficacy of some insecticides against major insect pests of chili was conducted during khany; 2012 at the Instructional Farm, Rajasthan College of Agriculture, MPUAT, Udaipur. The results revealed that two sprays of imidacloprid 17.8 SL at 22.5 g a.i./ha at seven days interval was most effective and significantly superior to all other treatments which caused 91.05, 88.64 and 90.02 per cent mean reduction in aphid, whitefly and jassid population, respectively; however, two sprays of fipronil 5 SC at 40g a.i./ha at seven days interval was effective against thrips (90.99%); while, two sprays of flubendiamide 480 SC at 72 g a.i./ha at seven days interval was significantly more effective against fruit borer, which recorded only 5.67 per cent fruit damage. Imidacloprid 17.8 SL at 22.5 g a.i./ha sprayed twice recorded significantly highest marketable yield of chilli (117.08 q/ha). None of the insecticides evaluated had any visible adverse effect on the natural enemy population.