lfuron methyl and water soluble metabolites than the latter two. In Milyang 30, bensulfuron methyl was less translocated from roots to shoots and largely degraded in roots, and these may contribute to its resistance. The low sensitivity of Shingwang may be related to its high degradation ability in roots, while in Nihonbare and Sangpung the rate of degradation of the herbicide was much lower than Milyang 30.