Abstract: Studies were conducted to observe the physico-morphic influence of different doses of Tamaron 600 SL viz., 200, 300, 400, 500 and 600 ml per acre on FH-682 cotton at Faisalabad under natural field conditions. The experiment was laid out in Randomized Complete Block Design with 6 treatments including control and with 3 repeats. The crop was sprayed 3 times during its growth season. All the physico-morphic characters were studied at crop maturity stage. Results revealed that Tamaron 600 SL @ 400 ml/acre was found to be the most effective than others. Seed cotton yield was found to be positively correlated only to the plant height, weight of dry brackets and number of opened bolls but other plant characters like weight of dry leaves, weight of dry stem, number of leaves, number of unopened bolls and leaf area index were found to be negatively correlated. All the characters under study showed significant differences to different doses of insecticide under trial.