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2013/2014: Wheat Weed Control. Treated. Untreated. A. Stanley Culpepper University of Georgia Tifton, GA. Presentation Format. 1. Broadleaf Control 2. Ryegrass Control 3. Preplant Control for No-Till. Broadleaf Weeds – In Crop Wild radish, henbit, chickweed, primrose, swinecress

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Treated

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  1. 2013/2014: Wheat Weed Control Treated Untreated A. Stanley Culpepper University of Georgia Tifton, GA

  2. Presentation Format 1. Broadleaf Control 2. Ryegrass Control 3. Preplant Control for No-Till

  3. Broadleaf Weeds – In Crop Wild radish, henbit, chickweed, primrose, swinecress Great options exists, growers just need to be timely!!!!!

  4. Broadleaf Weeds – In Crop ALS Inhibition Harmony Extra Express Peak Finesse Osprey PowerFlex Synthetic auxin 2,4-D MCPA

  5. Controlling Broadleaf Weeds 1. Harmony TS fb MCPA or 2,4-D Most effective program Least effective program

  6. MCPA vs 2,4-D CROP RESPONSE: MCPA: 2 tiller to full tiller wheat 2,4-D: full tiller wheat WEED RESPONSE: Similar on small weeds; 2,4-D better on larger weeds. Both outstanding on radish.

  7. MCPA vs 2,4-D CROP RESPONSE MCPA: 2 tiller to full tiller wheat 2,4-D: full tiller wheat WEED RESPONSE Similar on small weeds; 2,4-D better on larger weeds. Both outstanding on radish. USE MCPA AND BE TIMELY?

  8. Controlling Broadleaf Weeds 1. Harmony TS fb MCPA or 2,4-D 2. Harmony TS + MCPA or 2,4-D Most effective program Least effective program

  9. Controlling Broadleaf Weeds 1. Harmony fb MCPA or 2,4-D 2. Harmony TS + MCPA or 2,4-D 3. 2,4-D alone 4. MCPA alone 5. Harmony Extra alone Most effective program Least effective program

  10. Controlling Broadleaf Weeds 1. Harmony fb MCPA or 2,4-D 2. Harmony TS + MCPA or 2,4-D 3. 2,4-D alone 4. MCPA alone 5. Harmony Extra alone Most effective program Least effective program

  11. Ryegrass Control in Wheat ACY 9-04 1. A genetic stud– will develop resistance to ALL herbicides more quickly than any other known plant. 2. Extremely competitive with grain production. 3. Great options available ……….

  12. Ryegrass Control in Wheat ACY 9-04 1. A genetic stud– will develop resistance to ALL herbicides more quickly than any other known plant 2. Extremely competitive with grain production. 3. Great options available ………. IF YOU DON’T HAVE RESISTANCE

  13. Annual Ryegrass – In Crop ACCase Inhibition Holeon Axial ALS Inhibition Osprey PowerFlex PSII and VLCFA Axiom Inhibit Microtubule Prowl

  14. Annual Ryegrass – In Crop ACCase Inhibition Holeon Axial ALS Inhibition Osprey PowerFlex PSII and VLCFA Axiom Inhibit Microtubule Prowl

  15. Ryegrass Control in Wheat • Resistance management: Axial and Hoelon have same mode of action. Treat a field only once every two years with either. Osprey and PowerFlex have same mode of action. Treat a field only once every two years with either. • Timeliness is critical ACY 9-04

  16. Proper Timing of POST Materials • Timeliness is critical !!! • With normal planting date, generally best to apply before Christmas ACY 9-04

  17. Non-treated control Hoelon 2X rate

  18. Non-treated control PowerFlex 3X rate or Osprey at 3X rate

  19. Non-treated control Axial XL 2X rate

  20. Non-treated control Was A Future Product

  21. Ryegrass Resistant to ALL POST’S • Rotate out of grains and grow a crop allowing tillage and Roundup! • Efforts underway to understand impacts of deep turning. • Couple of products may help but are not a solution!

  22. Prowl H20 Labeled For Wheat • FAIR residual control of ryegrass • Must apply to wheat from 1st leaf stage until before flag leaf. • May mix with any currently labeled wheat herbicide. Will help on resistance a little!!!!

  23. Axiom Labeled For Wheat • Spike application to wheat (pray the ryegrass is not up before product is activated) • Generally 6 to 8 oz/A • Excellent broadleaf control • Ryegrass control is either good or very poor depending on when it emerges • Only option for some growers due to resistance • Injury can be significant if very heavy rains and cold conditions occur after application Will help on resistance!!!!

  24. Zidua: Game Changer??? • Labeled next season. • PRE: Outstanding ryegrass control; injury concerns? • Spike: Fair ryegrass control; great crop safety! • Should be economical for wheat producers. • Resistance likely if used 3 years in a row on same heavily infested field. Must rotate away from Zidua every other year. Excellent resistant management tool when rotated with POST ryegrass materials!!

  25. No-Till Production Clean at Planting: Roundup: 0 d plantback Gramoxone: 0 d plantback Harmony: 0 d plantback 2,4-D: 24 d + 1 inch rain plantback Valor: 30 d + 1 inch rain plantback Select: 30 d plantback

  26. No-Till Production 1. ZERO EMERGED RYEGRASS AT PLANTING: Roundup full rate 7 to 10 d prior to plant followed by Gramoxone at planting

  27. No-Till Production 1. ZERO EMERGED RYEGRASS AT PLANTING: Roundup full rate 7 to 10 d prior to plant followed by Gramoxone at planting 2. 2,4-D For Burndown: At least 24 days and no less than1 inch of rain

  28. No-Till Production 1. ZERO EMERGED RYEGRASS AT PLANTING: Roundup full rate 7 to 10 d prior to plant followed by Gramoxone at planting 2. 2,4-D For Burndown: At least 24 days and no less than1 inch of rain 3. Corn: Select 30 day plant back or beat on it with Gramoxone

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