In this study, effects of Halosulfuron-methyl on weed control of turf were determined at three locations (Kaohsiung, Taichung-TACTRI, Taichung golf). In turf, Halosulfuron-methyl 75% WG (Water dispersible granule) was applied to weeds in early growth stage. Halosulfuron-methyl was good for control of Kyllinga brevifolia, Cyperus compressus, Cyperus rotundus, Lindernia crustacea, Lindernia antipoda, Mazus japonicus and Ageratum houstonianum at 15-20 days after foliar application.