Onion thrips (Thrips tabaci Lindeman) is a major pest of onion, capable of causing substantial yield losses (up to 90 %) through foliar damage and transmission of Iris yellow spot virus, while also predisposing plants to secondary infections such as purple blotch. Host plant resistance, mediated through antixenosis, antibiosis and tolerance mechanisms, represents a durable and sustainable management approach. A field experiment was conducted during rabi 2021–22 to screen 70 onion genotypes again