Crabgrass, a malignant weed on golf turf, affects the hitting effect and golf course landscape. In this study, three herbicides were used for crabgrass in driving range of the golf course in Southern China. Metsulfuron-Methyl, Flazasulfuron and Quinclorac were sprayed at three concentration gradients of 1, 2 and 3 times respectively. Results showed that three times the recommended amount of quinclorac had the best killing effect on crabgrass and the other two herbicides were still unsatisfactory even if the concentration reached three times of the recommended amount. The efficacy of quinclorac at recommended dose is 2.2 times higher than that of metsulfuron-methyl, and 1.3 times higher at three times recommended dose. Because this experiment was carried out in November, the leaf and sheath of crabgrass is old, cellulose content is high, lignification is serious, and it has high resistance to chemical herbicides. Manual removal is more environmentally friendly and efficient method.

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