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TITLE    (click title to view slides)
Cotton Production Breakout Section - 2005

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

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TABLE OF CONTENTS
  1. Cotton Production Breakout Section - 2005
  2. No. 1 Recommended Burndown Program
  3. Other Recommended Burndown Program
  4. Cotton Growth as Impacted by Time of Killing Cover Crop in a Dry Environment
  5. Roundup Ready Flex
  6. Roundup Ready Flex Cotton
  7. Generic, Old WMax or OMax?
  8. RR or RR Flex Cotton
  9. RR or RR Flex Cotton
  10. When should control be initiated?
  11. Early Season Weed Competition
  12. Time of first application in RR Flex, Clayton, 2004
  13. Time of first application in RR Flex, Clayton, 2004
  14. RR Flex Seed Cotton LB/A Response to Time of WeatherMax Application
  15. Critical Timing of Weed Removal (when must weed control start?)
  16. Roundup Ready Flex: Will I benefit from a PRE herbicide?
  17. Delaying Resistance Is Now Priority
  18. Roundup Ready Flex: Will I benefit from a POST tank mix?
  19. Roundup Ready Flex: Will I benefit from a POST tank mix?
  20. Weed Response to the RESIDUAL of Envoke at 23 DAT.
  21. Palmer response to the residual of Staple, Envoke, or Metolachlor mixed with Roundup.
  22. New Staple Formulation for 2006
  23. Roundup Ready Flex: Can I mix in the kitchen sink?
  24. Impact of mixing insecticides with herbicides over-the-top of Flex cotton.
  25. Tank mixes of Dual, Staple, and insecticides with glyphosate on Flex cotton
  26. Impact of mixing insecticides with herbicides over-the-top of Flex cotton.
  27. Cotton Response to Glyphosate + Dual
  28. Impact of mixing insecticides with herbicides over-the-top of Flex cotton.
  29. Impact of mixing insecticides with herbicides over-the-top of Flex cotton.
  30. New Ignite Formulation
  31. non-treated vs. Ignite
  32. Ignite with no PRE Herbicide
  33. Pigweeds must be small for Ignite
  34. Prowl PRE, Ignite 2-leaf and 6-leaf, Caparol + MSMA layby
  35. Ignite Herbicide
  36. Strengths of Ignite in LL Cotton
  37. Liberty Link Cotton System
  38. Tank Mixes with Ignite
  39. Spiderworts Rank as Georgia's Most Troublesome Weed in Cotton
  40. Tropical Spiderwort in Georgia
  41. Tropical Spiderwort County Map
  42. Tropical Spiderwort and Cotton County Maps
  43. Spiderwort Response to Roundup
  44. Estimated Glyphosate-Resistant Planted Acres.
  45. Why Has This Dramatic Shift to Spiderwort Occurred?
  46. Strip-Tillage
  47. Tillage Impact on Tropical Spiderwort Cotton & Peanut
  48. Strip Tillage Cotton
  49. Conventional Tillage Cotton
  50. Cotton Herbicide Options
  51. Spiderwort Response to Residual Herbicides. Grady Co
  52. Layby Herbicides With POST Control. Grady Co, 2005.
  53. August 1 emergence after controlling 10 days earlier
  54. Layby Herbicides With POST Control. Grady Co, 2005.
  55. Layby Herbicides With POST Control. Grady Co, 2005.
  56. Cotton Herbicide Program Relies on Dual Magnum
  57. Dual Program Easy to Implement?
  58. Do not use Dual PRE on Georgia Soils
  59. Dual Program Easy to Implement?
  60. Must apply after cotton emerged
  61. Dual Program Easy to Implement?
  62. 2006 Cotton Program
  63. Tropical Spiderwort Response to Dual Systems at Harvest.
  64. Control 17 Days After Treatment
  65. Southern Root-knot Nematode Infestations
  66. Comments or Questions?



SLIDE CONTENTS
  1. Cotton Production Breakout Section - 2005 Breakout Discussion Topics Burndown Roundup Ready Flex Liberty Link Tropical Spiderwort
  2. No. 1 Recommended Burndown Program* Feb/Early March: 0.5 to 1 pt 2,4-D for primrose 1 to 1.5 pt 2,4-D for radish 1.5+ pt 2,4-D for horseweed (resistant?) Follow with non-selective herbicide alone or with residual near planting *2,4-D product is a 4 lb ai/gal
  3. Other Recommended Burndown Program* Primrose (after full bloom): Gramoxone + Direx Ignite Roundup + Valor Wild Radish Roundup + Harmony Extra Gramoxone + Direx (full bloom) Roundup + Valor (full bloom)
  4. Joel Faircloth, VT, 2005 Cotton Growth as Impacted by Time of Killing Cover Crop in a Dry Environment Cover killed 21 d ahead of planting Cover killed less than 10 d ahead of planting
  5. Roundup Ready Flex: How much does it cost? Are the varieties any good? When can I spray overtop? Will I benefit from other herbicides? PRE? POST? Can I mix the kitchen sink with it?
  6. planting harvest 4 leaf Layby 60% open bolls Roundup Ready® Flex Cotton In-season; emergence to 60% open 4.5 lb a.e. total in-crop Max of 1.13 lb a.e. per application Maximum of 4.5 lb ae/A from emergence to 60% open, or 128 oz W.Max or O.Max Maximum of 1.13 lb a.e. per application, or 32 oz W.Max or O.Max Maximum of 1.5 lb a.e. (44 oz W.Max or O.Max) from layby to 60% open No restrictions on timing of sequential applications Maximum of 1.5 lb a.e. (44 oz W.Max or O.Max) from 60% open till 7 days preharvest 1.5 lb a.e. 7 days Preharvest What Products to Use?
  7. Generic, Old WMax or OMax?
  8. RR or RR Flex Cotton Will I benefit from a PRE herbicide? - Control Florida pusley
  9. RR or RR Flex Cotton Will I benefit from a PRE herbicide? - Control Florida pusley - Timing of first glyphosate less critical - Protect against early season competition
  10. When should control be initiated?
  11. Early Season Weed Competition 2 inch weeds 5 inch weeds 8 inch weeds Application Timing
  12. YORK
  13. YORK
  14. RR Flex Seed Cotton LB/A Response to Time of WeatherMax Application.* Time of initial glyphosate application * Weed control complete after initial application was begun. Waiting till 4.5 leaf was 24% loss. Tifton, GA 2004. 3714 a 2816 b
  15. Critical Timing of Weed Removal (when must weed control start?) Yield (lbs/A) Weeks after planting Y=1151*(1-exp-6.7*exp-0.42*weeks) R2=0.99 Burton, Wilcut, & Burke
  16. Roundup Ready Flex: Will I benefit from a PRE herbicide? - Control Florida pusley - Protect against early season competition - Timing of first glyphosate less critical - PUT IT IN YOUR PROGRAM as part of resistance management strategy
  17. No Prowl Prowl PRE Delaying Resistance Is Now Priority
  18. Roundup Ready Flex: Will I benefit from a POST tank mix? - Options include: Dual Magnum Staple Envoke (maybe labeled in 06??)
  19. Roundup Ready Flex: Will I benefit from a POST tank mix? Dual PRE spiderwort pigweeds grasses doveweed nutsedge? RESISTANCE MGMT Staple POST morningglory sesbania RR Palmer Staple PRE pigweeds morningglory starbur Envoke POST morningglory sesbania nutsedge Envoke PRE pigweeds morningglory starbur
  20. Weed Response to the RESIDUAL of Envoke at 23 DAT. % control *Attapulgus, GA. Irrigated within 24 hr of application.
  21. Palmer response to the residual of Staple, Envoke, or Metolachlor mixed with Roundup. 42 DAT. % control *Attapulgus, GA. Treatments mixed with Roundup and applied to 4 leaf cotton. Roundup provided complete initial control. Irrigated within 24 hr of application. 54 c 72 b 92 a 88 a 88 a
  22. New Staple Formulation for 2006 Staple LX, replaces Staple SP Liquid formulation, 3.2 lb/gal 0.8 oz SP = 1.7 fl oz LX 1.2 oz SP = 2.55 fl oz LX No university trials
  23. Roundup Ready Flex: How much does it cost? Are the varieties any good? When can I spray overtop? Will I benefit from other herbicides? PRE? POST? Can I mix in the kitchen sink? Can I cut up my directed sprayer for scrap iron?
  24. Impact of mixing insecticides with herbicides over-the-top of Flex cotton. HERBICIDE Roundup Roundup + Dual Mag (1 pt) Roundup + Staple (0.8 oz) INSECTICIDE/PGR None Dimethoate (8 oz) Orthene (0.5 lb) Bidrin (6 oz) Mustang Max (3.6 oz) Vydate (17 oz) Diamond (9 oz) Tri-Max (1.5 oz) Tracer (2.1 oz) Pix ( 8 oz) Conducted at Tifton, Statesboro, and NC.
  25. Tank mixes of Dual, Staple, and insecticides with glyphosate on Flex cotton, NC. 2005. NC Results: Cotton response No response to insecticides alone with R’up Typical leaf speckling with Dual Somewhat greater Dual leaf speckling when Mustang Max, Diamond, or Vydate mixed with Dual; still minor injury Typical minor stunting with Staple; adding insecticides did not increase it
  26. Impact of mixing insecticides with herbicides over-the-top of Flex cotton. Little to no injury in Statesboro No injury in Tifton with Roundup alone mixed with Insecticides/PGR’s
  27. Cotton Response to Glyphosate + Dual* heavy dew no dew *Application with dew applied 7 am. Application without dew applied 11 am.
  28. Impact of mixing insecticides with herbicides over-the-top of Flex cotton.^ *Denotes more injury than herbicide alone. ^Visual injury 3 d after 2nd application except with Pix.
  29. Impact of mixing insecticides with herbicides over-the-top of Flex cotton.^ % injury Roundup plus Staple none Dimethoate Orthene Bidrin Mustang Max Vydate Diamond Tri-Max Pix * Tracer *Denotes more injury than herbicide alone. ^Visual injury 3 d after 2nd application except with Pix.
  30. New Ignite Formulation Ignite 280 SL 280 g/L active 2.34 lb/gal active 22 to 29 fl oz/acre Old Ignite 1.67 lb/gal 32 to 40 fl oz/acre
  31. non-treated Ignite
  32. Ignite 1- to 2-leaf Ignite 3- to 4-leaf Ignite 6-leaf Ignite 6-leaf No PRE Herbicide YORK
  33. Pigweeds must be small for Ignite
  34. Prowl PRE, Ignite 2-leaf and 6-leaf, Caparol + MSMA layby. Clayton, NC 2004 YORK
  35. Ignite Herbicide Limited translocation in plants Spray coverage critical 15+ GPA flat fans only 30-60 PSI Air induction nozzles not recommended
  36. Strengths of Ignite in LL Cotton Excellent crop tolerance Good control of most broadleaf weeds Poor on Florida pusley Weak on pigweeds unless small Weak on tropical spiderwort Weak on most grasses unless small Inadequate on nutsedge and goosegrass
  37. Liberty Link Cotton System PRE herbicide recommended Timely Ignite application a. With PRE, can usually delay first application to 3- to 4-leaf cotton b. Second Ignite weeds < 3 inches, usually 5- to 8-leaf cotton Conventional layby
  38. Tank Mixes with Ignite Post grass herbicides -- NO Dual Magnum* -- okay Staple* -- okay * Do NOT mix Dual and Staple
  39. Spiderworts Rank as Georgia’s Most Troublesome Weed in Cotton 1999: not ranked 2001: 9th 2002: # 1 2003: # 1, 2, and 3
  40. Tropical Spiderwort in Georgia 1999 2004 2004 map confirmed by the GA Dept of Ag
  41. Blue = 2004 sites confirmed Black = 2005 sites confirmed
  43. Spiderwort Response to Roundup* *Pictures 15 d after treatment. No plants died from any treatment. Six inch at time of application.
  44. Estimated Glyphosate-Resistant Planted Acres. % Acres
  45. 94% Roundup Ready 44% strip-till Greater than 88% not cultivated Trends away from effective residual herbicides Why Has This Dramatic Shift to Spiderwort Occurred?
  46. Strip-Tillage Brecke, 05
  47. Tillage Impact on Tropical Spiderwort Cotton & Peanut Brecke, 05
  48. Strip-Tillage Cotton Brecke, 05
  49. Conventional Tillage Cotton Brecke, 05
  50. Cotton Herbicide Options PRE Caparol Cotoran Direx Prowl Staple Zorial Topical Cotoran Dual Envoke Ignite Roundup Staple Directed* Aim Caparol Cobra Direx Harvade Layby Pro MSMA Suprend Valor *Directed options also include all topical herbicides
  51. Spiderwort Response to Residual Herbicides. Grady Co, 5 Loc., 2002, 2003, 2004. LSD = 7
  52. Layby Herbicides With POST Control. Grady Co, 2005. % control Roundup Aim + COC Roundup + Aim Direx + MSMA Valor + MSMA 7 DAT LSD = 12 Roundup + Valor *Prowl PRE, Roundup early POT
  53. August 1 emergence after controlling 10 days earlier
  54. Layby Herbicides With POST Control. Grady Co, 2005. % control Roundup Aim + COC Roundup + Aim Direx + MSMA Valor + MSMA 60 DAT LSD = 10 Roundup + Valor *Prowl PRE, Roundup early POT
  55. Layby Herbicides With POST Control. Grady Co, 2005. % control Roundup + Aim Direx + MSMA 60 DAT LSD = 10 *Prowl PRE, Roundup POT Roundup + Aim + Dual Mag. Direx + MSMA + Dual Magnum
  56. Cotton Herbicide Program Relies on Dual Magnum Residual Topical Directed* Dual Magnum
  57. Dual Program Easy to Implement? 1. Severe injury can occur if applied PRE to cotton
  58. Dual Magnum PRE Do Not Use Dual PRE on Georgia Soils
  59. Dual Program Easy to Implement? Severe injury can occur if applied PRE to cotton Must apply after cotton emerged
  61. Dual Program Easy to Implement? Severe injury can occur if applied PRE to cotton Must apply after cotton emerged Doesn’t rain doesn’t work Rains more than an inch or two control <20 d Increased weed management cost at least 25 to 50%, whether it works or not.
  62. Plant early Plant aggressively growing cultivar (shade soil early) Reduce seed production after other crops!!!!!!! Reduce the alarming rate of spread!!!!!!!! 5. Cotoran PRE (if planting at or near time of emergence) 6. POST herbicide needs to include Dual 7. Layby herbicide options Aim, Direx, Valor, MSMA Dual also needed at layby for many fields 2006 Cotton Program
  63. Tropical Spiderwort Response to Dual Systems at Harvest.* Two Loc. 2004-2005. *Prowl applied PRE over trial. % control 86 a 53 c 80 a 69 b 67 b
  64. RU + Dual 16 oz EPOST fb RU RU + Dual 12 oz Sequentially Control 17 Days After Treatment.
  65. Southern Root-knot Nematode Infestations
  66. COMMENTS OR QUESTIONS?