Slide Presentation

TITLE    (click title to view slides)
Wheat Weed Management Update for 2008/2009 Season

AUTHOR
Stanley Culpepper
Extension Weed Specialist
University of Georgia
Tifton, GA

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TABLE OF CONTENTS
  1. Wheat Weed Management Update for 2008/2009 Season
  2. Controlling Broadleaf Weeds
  3. Harmony Extra EP with TotalSol
  4. 2,4-D
  5. Express TotalSol + MCPA
  6. The Effect of Stage of Growth on Wild Radish Control in Wheat
  7. Controlling Broadleaf Weed Infestations
  8. Ryegrass Control in Wheat
  9. Ryegrass Control in Wheat
  10. Ryegrass Control in Wheat
  11. Proper Timing of Hoelon POST
  12. Italian ryegrass control. Plains, 2008.
  13. Hoelon Rate for POST on Wheat
  14. Axial
  15. Osprey
  16. Italian ryegrass control by Osprey as affected by size. North Carolina.
  17. Late-season ryegrass control by Osprey as affected by adjuvants. NC
  18. Rotaional Restrictions for Osprey
  19. PowerFlex
  20. Rotational Restrictions for PowerFlex
  21. Prowl H2O Labeled for Wheat
  22. Late-season ryegrass control with Prowl H20 applied POST to 1 leaf wheat. Plains, GA.
  23. Late-season ryegrass control with Prowl H20 applied in mixture with Osprey or Hoelon. Plains, GA.
  24. Axiom Labeled for Wheat
  25. Annual Bluegrass



SLIDE CONTENTS
  2. Controlling Broadleaf Weeds 1. Options are available 2. Timely applications required 2,4-D Express + MCPA Harmony Extra
  3. Harmony Extra EP with TotalSol Rate: 0.45 to 0.9 oz Timing: 2-leaf until flag leaf visible Adjuvant: 0.25% NIS in water 0.125% NIS in nitrogen Weeds: Controls garlic and most broadleaf weeds Mixes: 2,4-D or MCPA to improve cornflower, wild radish, and vetch Rotations: No restrictions of concern Grains: Wheat, barley, oats
  4. 2,4-D Rate: 1 to 1.25 pt/A Timing: fully tillered wheat, before jointing Adjuvant: none needed Weeds: controls primrose and radish, weak on henbit, chickweed, and knawel Mixes: Express or Harmony Extra for henit, chickweed and knawel Rotations: No restrictions of concern Grains: Wheat, barley, oats, rye
  5. Express TotalSol + MCPA Express rate: 0.25 to 0.5 oz MCPA 4L rate: 8 to 12 fl oz Timing: two tillers, before jointing Adjuvant: 0.125% surfactant Weeds: most broadleaf weeds Rotations: No restrictions of concern Grains: Wheat, barley, oats,
  6. The Effect of Stage of Growth on Wild Radish Control in Wheat. 1Wild radish size in diameter of leaf rosette. 2Percent control as compared to untreated areas. 3Research is based on only one experiment and should be tried on very limited acreage.
  7. Controlling Broadleaf Weed Infestations 1. Harmony fb 2,4-D 2. Express + MCPA or 2,4-D Harmony + MCPA or 2,4-D 3. 2,4-D alone 4. Harmony Extra alone Most effective program Least effective program
  9. IF YOU DON’T HAVE RESISTANCE
  12. Italian ryegrass control. Plains, 2008. 92 95 89 ACY 9-04 Planted wheat on Nov 7 and treated December 19 prior to tillering 96
  13. Hoelon Rate for POST on Wheat Ryegrass pt/acre 1- to 3 leaf 1.33 3- to 4-leaf 1.33 to 2 5-leaf, 2 tillers 2 to 2.67 Hoelon at 2 pt/A on pre-tillering ryegrass is ideal!!!!!
  14. Axial Rate: 8.2 fl oz Timing: pre-tiller ryegrass Adjuvant: Adigor at 9.6 oz/A Weeds: ryegrass only Rotate modes of action, resistance is a huge issue!
  15. Osprey Rate: 4.75 oz/A Timing: pre-tiller ryegrass Adjuvant: NIS at 0.5% v/v plus ammonium nitrogen fertilizer at 1-2 qt/A Weeds: ryegrass, very small radish, henbit hand chickweed (1”) Do not apply within 14 d of topdressing Rotate modes of action, resistance is a huge issue!
  16. Italian ryegrass control by Osprey as affected by size. Avg. 5 locations, North Carolina. ACY 9-04
  17. Late-season ryegrass control by Osprey as affected by adjuvants. Avg. six locations, NC, 2002-2004.
  19. PowerFlex Rate: 3.5 oz/A Timing: pre-tiller ryegrass Adjuvant: NIS at 0.25% v/v Weeds: ryegrass, radish Rotate modes of action, resistance is a huge issue! Labeled rotational restrictions are large!
  21. New Georgia registration Residual control/suppression of ryegrass Must apply to wheat from 1st leaf stage until before flag leaf. May mix with any currently labeled wheat herbicide. Prowl H20 Labeled For Wheat
  22. Late-season ryegrass control with Prowl H20 applied POST to 1 leaf wheat. Plains, GA. 2007.* 99 52 *Prowl H20 2.5 pt/A
  23. Late-season ryegrass control with Prowl H20 applied in mixture with Osprey or Hoelon. Plains, GA. 2007.* 75 c 100 a *Prowl H20 2.5 pt/A; Hoelon 2 pt/A; Osprey4.75 oz + NIS and UAN. 85 b 100 a
  24. Limited amount of product 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 Only option for some growers because of resistance Aixom Labeled For Wheat
  25. Limited knowledge and I think research Osprey and Axiom are good Annual bluegrass