The aim of this study was to conduct a survey to monitor the population of Thrips tabaci in district of Aligarh, located in Uttar Pradesh region, during the favorable growing season of tomato crops. The main objective was to provide relevant information on the infestation levels and abundance of Thrips tabaci population. Thrips tabaci, commonly known as “Onion Thrips”, is primarily known to infest onion crops (Allium cepa).The survey focused on three villages in this region, namely Jalali, Pikhaloni and Harduaganj. We collected data on the infestation and abundance of Thrips tabaci in these localities. Our findings indicated that infestation and damage caused by Thrips tabaci on tomato fields bagan in the last week of September, with the highest population levels recorded in the first week of November.

Keywords : Monitor, Infestation, Abundance, Thrips tabaci.