Abstract: The sensitivities of different species of paddy rice to chlorsulfuron have been observed.The results show that“9-92”,“9325”and“9380”paddy rice species were highly sensitive to chlorsulfuron residue.Based on the results of adding method,the effects of chlorsulfuron residue on the height,littering,dry matter accumulation and yields of paddy rice are significant.The yield of“9-92”rice decreased by 2.32 %-23.58%.In Yanjiang Plain,Menghe Plain and the hilly areas of Zhenjiang municipality the application of chlorsulfuron should be banned in farmlands with no serious herb problems existing.

Key words: chlorsulfuron, residue, paddy rice