Vol. 12, Issue 3 (2023)

During the period of investigation, the mean maximum and minimum temperatures recorded was 36 ºC and 28 ºC respectively, with a relative humidity of 70.8 percent. Bio efficacy of insecticides were tested in field conditions. Observations on percent fruit infestation were recorded at 10 days after spray in each treatment. Total 3 sprays were done at 10 days interval after noticing the ovipositional marks on mango fruits during fruiting stage of the crop. Among the insecticides evaluated lowest reduction of percent fruit infestation was observed in treatments lambda cyhalothrin 5 EC @ 25 g a.i/ha (23.87%) and azadirachtin 0.03% @ 3 ml/l (25.18%) which are at par with each other. The next effective treatment was imidacloprid 17.8 SL @ 30 g.a.i /ha which recorded an infestation of 34.78%. The highest percent fruit infestation was recorded in the treatment Beauveria bassiana WP 2% @ 20 g/L (58.35%). Lambda cyhalothrin 5 EC was the superior treatment in comparison with the mean yield per plant, net monetary return and benefit cost ratio, followed by azadirachtin 0.03% and imidacloprid 17.8 SL.