Field experiment was conducted to evaluate organic and inorganic chemical molecules against onion thrips, Thrips tabaci Lindeman under field condition during 2012-13 at the Regional Agricultural Research Station, Vijayapur. Among different insecticides tested, the lowest thrips population and highest bulb yield was recorded in the treatment thiamethoxam 25 WG @ 0.2 g/l and imidacloprid 70 WG @ 0.33 g/l. These treatments also recorded higher BC ratio of 3.62 and 3.51, respectively. While the organics viz., nimbecidine 300 ppm @ 3 ml/l, vermiwash : water @ 1: 5 and Verticellium lecani @ 1 g/l were found moderately effective in reducing the onion thrips under field conditions. At 10 days after second spray, the higher population of spiders (13.66/ 5 plants) and coccinellid beetles (12.66/5 plants) were noticed in untreated control, followed by V. lecani @ 1 g/l (13.66 spiders and 11.66 coccinellids/5 plants) and panchagavya @ 2% (12.66 spiders and 11.66 coccinellids/5 plants). The lower population of spiders (6.66/5 plants) and coccinellid beetles (5.66 coccinellids/5 plants) was noticed in nimbecidine  300 ppm @ 3 ml/l followed by acetamiprid 20 SP @ 0.5 g/l (6.66 spiders and 7.33 coccinellids/ 5 plants) and profenophos 50 EC @ 1 ml/l (7.00 spiders and 7.00 coccinellids/5 plants).