Winter annual grass weed ID<br />Joe Armstrong<br />Oklahoma State University<br />
All photos, unless noted, were taken by Joe Armstrong.  If you would like high resolution versions of these photographs, p...
rescuegrass<br />Membranous ligule<br />Dense hairs on seedlings<br />Diagram: Weeds of the South<br />
rescuegrass<br />Seedheads are flat, awnless<br />
cheat (“true cheat”)<br />Membranous ligule<br />Seedhead has awns<br />weeds.ippc.orst.edu<br />twig.tamu.edu<br />Diagra...
cheat<br />
downy brome<br />Japanese brome<br />Membranous ligule<br />Diagram: Weeds of the South<br />
downy brome<br />Japanese brome<br />weeds.ippc.orst.edu<br />weeds.ippc.orst.edu<br />
downy brome<br />Japanese brome<br />
Italian ryegrass<br />Membranous ligule<br />Large, clasping auricles<br />Shiny, waxy leaves<br />ALS-resistance<br />ACC...
Italian ryegrass<br />
wild oat<br />Large, jagged membranous ligule<br />Scattered hairs on leaf and stem<br />twig.tamu.edu<br />Diagram: Weeds...
wild oat<br />calphotos.berkeley.edu<br />twig.tamu.edu<br />
jointed goatgrass<br />Short, membranous ligule<br />Sparse, stiff hairs on leaf margins<br />twig.tamu.edu<br />jointedgo...
jointed goatgrass<br />Can hybridize with wheat<br />jointed goatgrass<br />wheat<br />hybrid<br />twig.tamu.edu<br />
feral rye<br />Small, membranous ligule<br />May have small auricles<br />Grows taller than wheat<br />
feral rye<br />
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2011 grass weed id web

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2011 grass weed id web

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

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