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2011 grass weed id web
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2011 grass weed id web

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  • 1. Winter annual grass weed ID
    Joe Armstrong
    Oklahoma State University
  • 2. All photos, unless noted, were taken by Joe Armstrong. If you would like high resolution versions of these photographs, please contact Joe at joe.armstrong@okstate.edu.
  • 3. rescuegrass
    Membranous ligule
    Dense hairs on seedlings
    Diagram: Weeds of the South
  • 4. rescuegrass
    Seedheads are flat, awnless
  • 5.
  • 6. cheat (“true cheat”)
    Membranous ligule
    Seedhead has awns
    weeds.ippc.orst.edu
    twig.tamu.edu
    Diagram: Weeds of the South
  • 7. cheat
  • 8.
  • 9. downy brome
    Japanese brome
    Membranous ligule
    Diagram: Weeds of the South
  • 10. downy brome
    Japanese brome
    weeds.ippc.orst.edu
    weeds.ippc.orst.edu
  • 11. downy brome
    Japanese brome
  • 12. Italian ryegrass
    Membranous ligule
    Large, clasping auricles
    Shiny, waxy leaves
    ALS-resistance
    ACCase-resistance??
    Diagram: Weeds of the South
  • 13. Italian ryegrass
  • 14. wild oat
    Large, jagged membranous ligule
    Scattered hairs on leaf and stem
    twig.tamu.edu
    Diagram: Weeds of the South
  • 15. wild oat
    calphotos.berkeley.edu
    twig.tamu.edu
  • 16.
  • 17. jointed goatgrass
    Short, membranous ligule
    Sparse, stiff hairs on leaf margins
    twig.tamu.edu
    jointedgoatgrass.wsu.edu
    Diagram: Weeds of the South
  • 18.
  • 19.
  • 20. jointed goatgrass
    Can hybridize with wheat
    jointed goatgrass
    wheat
    hybrid
    twig.tamu.edu
  • 21. feral rye
    Small, membranous ligule
    May have small auricles
    Grows taller than wheat
  • 22. feral rye