05). Maximum mean body weight gain per bird/day (34.39 g) was achieved by chickens on control diet which was statistically significant to birds fed Salvinia molesta diets. However, chickens on diet T1 also attained a significantly higher body weight gain (28.22 g) to treatments T2 (22.30 g) and T3 (19.33 g). Better feed conversion ratio was observed with chickens fed the control (4.01) and T1 (4.85) which were similar while deteriorating feed conversion ratio was observed with T2 (6.27) and T3 (7.14) which were similar. The difference between the former and latter treatment groups was significant (P<0.05). Maximum mean final live weight (1758.72 g) was gained with chickens on control diet followed by T1 (1573.56 g), T2 (1371.03 g) and T3 (1226.60 g)