India ranks second next to China in global wheat production. Presently wheat accounts for one third of India's total food grain production. The adoption of fertilizer responsive, high-yielding dwarf wheat varieties suffered a setback owing to their poor ability to compete with grassy weeds particularly Phalaris minor and wild oats. Wheat fields are generally infested with both grassy as well as broadleaf weeds and cause yield, loss of 7-50% depending upon the type and their intensity (Gill, 1979). Isoproturon is a commonly used herbicide for the control of grassy weeds and 2,4-D is effective against broadleaf weeds. However, their continuous use has either resulted in shift of weed flora towards resistant species or emergence of resistant strains insome species (Yadav et al., 1996). This calls for the use of other broad spectrum herbicides either independently or in combination with isoproturon for the management of complex weed flora to avoid perceptible weed flora. Therefore, the present investigation was undertaken to find out the efficacy of some broad spectrum herbicides alone or in combination with isoproturon for control of grassy and non-grassy weeds in wheat.
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