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2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
2011 grass weed id web
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2011 grass weed id web

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  • 1. Winter annual grass weed ID<br />Joe Armstrong<br />Oklahoma State University<br />
  • 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. rescuegrass<br />Membranous ligule<br />Dense hairs on seedlings<br />Diagram: Weeds of the South<br />
  • 4. rescuegrass<br />Seedheads are flat, awnless<br />
  • 5.
  • 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. cheat<br />
  • 8.
  • 9. downy brome<br />Japanese brome<br />Membranous ligule<br />Diagram: Weeds of the South<br />
  • 10. downy brome<br />Japanese brome<br />weeds.ippc.orst.edu<br />weeds.ippc.orst.edu<br />
  • 11. downy brome<br />Japanese brome<br />
  • 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. Italian ryegrass<br />
  • 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. wild oat<br />calphotos.berkeley.edu<br />twig.tamu.edu<br />
  • 16.
  • 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.
  • 19.
  • 20. jointed goatgrass<br />Can hybridize with wheat<br />jointed goatgrass<br />wheat<br />hybrid<br />twig.tamu.edu<br />
  • 21. feral rye<br />Small, membranous ligule<br />May have small auricles<br />Grows taller than wheat<br />
  • 22. feral rye<br />

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