Seven chemicals were field evaluated, in a RCB design with 3 or 4 replications, as suckercides on flue-cured tobacco in 3 locations for two years and on burley tobacco in one location for two years. Data obtained were : leaf area and fresh weight of the last (18th) harvestable leaf; number and fresh weight of suckers per plot; yield and quality of cured leaf; percent nicotine, total nitrogen, and reducing sugars, and chemical residues in the cured leaf. Topping and control of suckers with two applications of a contact type suckercide or one application of a contact type suckercide followed by an application of RMH-30 increased leaf area of the 18th leaf by about 70% and weight by about 80 to 100% compared to untopped or topped but untreated tobacco (controls). All sucker control chemicals reduced significantly number and weight of suckers per plot (more than 90%). Yield and quality of topped and treated tobacco was significantly increased compared to controls. Chemical composition of tobacco was not significantly affected although higher values were measured where a suckercide was used. Residues of some suckercides on cured leaf were, generally, below the accepted tolerance levels.