Effect of Herbicides on Field Violet (Viola arvensis) in Direct-Seeded Spring Wheat1

  title={Effect of Herbicides on Field Violet (Viola arvensis) in Direct-Seeded Spring Wheat1},
  author={Rory F. Degenhardt and Dean Spaner and K. Neil Harker and William R. McGregor and Linda M. Hall},
  booktitle={Weed Technology},
The agrestal field violet, a pervasive weed in Europe, has been identified in reduced-tillage cereal fields in Alberta. The efficacy of herbicides in direct-seeded spring wheat was assessed on natural field violet infestations in Alberta in 2002 and 2003. Only fluroxypyr + 2,4-D, applied postemergence, provided control of field violet in 2002 when rainfall was limiting. Over both years, this herbicide combination reduced biomass by 59 to 69% and plant density by 83 to 91%, relative to… Expand
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