The present research work was conducted at Agricultural Research Institute Tarnab, Peshawar during 2020. The study aimed to evaluate the comparative worth of different botanicals and selected synthetic insecticides against chilli thrips in vivo condition, as well as the CB ratio of botanicals and synthetic insecticides against chilli thrips regulation. Highest efficacy has been shown by imidacloroprid after 1^st and 2^nd application at 3 DAS (21.65, 16.66 thrips plant^-1) followed by 5 DAS (6.65 and 5.66 thrips plant^-1) while at 7 DAS (13.65, 12.00 thrips plant^-1). Whereas among botanicals, Momordica charantia (Bitter gourd) showed maximum control at 3 DAS (28.32, 26.32 thrips plant^-1) and 5 DAS (23.32, 21.32 thrips plant^-1) while at 7 DAS (29.32, 27.32 thrips plant^-1) the population of Scirtothrips dorsalis was exceeded. Similarly, the lowest pest reduction has been shown by Ocimum basilicum (basil) extracts at 3 DAS (32.32, 31.32 thrips plant^-1) and 5 DAS (29.32, 27.65 thrips plant^-1) while at 7 DAS (33.32, 31.65 thrips plant^-1). Similarly, the cost and benefit analysis showed that maximum return was obtained from imidacloropid treated plot instead of botanicals. On the other hand, among botanicals, bitter melon showed maximum return cost and benefit analysis as compared to the rest of botanical treatments. Among all the botanicals, basil was significantly best recorded due to minimum treatment cost.

Keywords: Scirtothrips dorsalis, Momordica charantia, Ocimum basilicum, Imidacloprid, Acetamiprid