Efficacy of four new-chemistry insecticides viz. Steward 150 EC, Proclaim 19 EC, Tracer 240 SC and Match 50 EC at recommended rates were tested against amaltas leaf stitcher Piesmopoda obliquifasciella Hamps. at Pakistan Forest Institute, Peshawar. Results of the post-spray data recorded after 1, 3 and 7 days revealed that all the insecticides were significantly effective in reducing the larval population of the pest as compared to the untreated check. Steward 150 EC (Indoxacarb) was found to the most effective insecticide with maximum % mortality of 96.167, 98.167 and 100.00 %, after 24 hours, 72 hours and one week respectively, closely followed by Tracer 240 SC, with 92.880, 97.003 and 100.00 % mortality while Proclaim 19 EC with 90.673, 97.643 and 100.00 % mortality and Match 50 EC with 87.247, 93.860 and 95.063 % mortality after 24 hours, 72 hours and one week, respectively.