2[4]Johnson,B.J.Differential large crabgrass control with herbicides in tall fescue and common bermudagrass.HortScience.1993，28(10):1015～1016.
3[5]Johnson,B.J.Herbicides programs for large crabgrass and gooseg－rassinKentuckybluegrassturf.HortScience.:1994,29(8):876～879.
4[7]JackD.Fry and WardS.Upham.Buffalograss seedlingtolerancetopostemergenceherbicides.HortScience.1994，29(10):1156～1157.
5[8]Fry，J.D.,P.H.Dernoeden,W.S.Upham and Y.L.Qian,Safety and efficacy of halosulfuron－methyl for yellow nutsedgetoplillincool－seasonturf.HortScience1995，30(2):285～288.
