Onion Thrips, Thrips tabaci (Thysanoptera: Thripidae), is the major pest of onion crops causing losses to the farmers and its control has been an issue of significance in the pest control strategies. The objective of this study was to evaluate different commercial chemical insecticides in farmer’s fields. Based on the laboratory results the toxic effect was evaluated in the field after one 1day and 3 days of the application of insecticides. The highest mortalities were recorded by Profenofos 720 EC (90.33-99.67%), the mixture of Profenofos 720 EC + Deltamethrin (93.47-99.67%), and Profenofos 720 EC + Emamectin benzoate (93.13-99.67% in the first season in both locations after 1 to 3 days of treatment exposure) while in the second season in both locations the percent mortalities were slightly declining as compared to the first season. Similarly, Yield loss due to onion thrips recorded 2.47 to 22.09% recorded in the second season. Based on these results it was recommended that Profenofos 720 EC alone and the mixture of other chemical insecticides (Deltamethrin and Emamectin benzoate) be effective for the management of onion thrips under field conditions. The study revealed that the mentioned insecticides were highly effective in minimizing onion thrips population and insecticide mixtures were effective in reducing onion thrips density. The study emphasizes the use of such insecticide mixture to develop a better management strategy for onion thrips populations attacking onion plants. However, the effects of such insecticide mixture on other organisms and biological control agents should be checked in a similar manner.