Pot experiments were conducted to find out GR,,, values of isoproturon. clodinafop. sulrosulfuron and fenoxaprop-p-ethyl for controlling Phalaris minor. Clodinafop. sulfosulfuron and fenoxaprop-p-ethyl were recommended at 60. 25 and 100 g ha". On an average of two years, GR,o values for isoproturon. clodinafop, sulfosulfuron and fenoxapropp- ethyl were found to be 1210, 2.47. 2.08 and 7.58 g ha-I, respectively. Among the alternate herbicides, lowest GR,,, value was observed in clodinafop which was followed by sulfosulfuron and fenoxaprop-p-ethyl and these values were many times lower than their recommended doses; however. GR,o values for isoproturon were found to be much higher

than even its recommended dose.