Slide Presentation

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

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TABLE OF CONTENTS
  1. 2000 Cotton Update
  2. Breakout Session Objectives
  3. Breakout Session Objectives - New Labels or Uses
  4. Glyphosate Formulations
  5. Roundup Ready Cotton Tolerance to Roundup, Touchdown, and Touchdown 5
  6. Morningglory Control in RR Cotton by Harvade Mixtures. Attapulgus, GA. 2000
  7. Breakout Session Objectives - RR cotton tolerance to glyphosate
  8. Transgenic Cotton Acreage in Georgia
  9. Lint Cotton Yields in RR Cotton when Treated Topically with Glyphosate at Various Growth Stages
  10. Glyphosate Overtop After 4th Leaf Stage
  11. Is Stem Absorption of Glyphosate Directed in RR Cotton a Concern?
  12. Cotton Yield After Various Glyphosate Applications. Moultrie, 2000.
  13. Precision PD or hooded sprayers
  14. Direct spray to the base of the cotton plants
  15. Direct spray to the base of the cotton plants - picture
  16. Contact of spray with cotton leaves should be avoided
  17. Sprayer picture
  18. Sprayer picture
  19. Sprayer picture
  20. Sprayer picture
  21. Place nozzles in low position
  22. Sprayer picture
  23. Sprayer picture
  24. Sprayer picture
  25. Precision and Sloppy Applied Glyphosate - Picture
  26. Precision and Sloppy Applied Glyphosate - Picture
  27. Breakout Session Objectives - Managing weeds that are difficult to control in RR cotton
  28. Cutleaf Eveningprimrose
  29. Cutleaf Eveningprimrose Response to Burndown Herbicides
  30. Cutleaf Eveningprimrose Control by Glyphosate and 2,4-D. Tifton, 2000.
  31. Cutleaf Eveningprimrose Fresh Weights After Treating with Burndown Herbicides. Tifton, 2000.
  32. 2,4-D Burndown for Cotton (from fallow land section of labels)
  33. Current Recommendations -- 2,4-D Burndown for Cotton
  34. Cotton Injury from 2.1 mls Per Acre of 2,4-D. Tifton, 2000.
  35. Florida Pusley
  36. Florida Pusley - use a DNA herbicide
  37. Florida Pusley Control with Glyphosate and Glyphosate Tank Mixtures. Tifton, 2000.
  38. Yellow and Purple Nutsedge
  39. Yellow and Purple Nutsedge Control Programs
  40. Yellow and Purple Nutsedge Control by Glyphosate. Greenhouse.
  41. Yellow and Purple Nutsedge Control by MSMA. Greenhouse.
  42. Morningglory
  43. Mid-Season Morningglory Control by Glyphosate & Glyphosate/Staple Mixtures.
  44. Glyphosate/Staple Tank Mixtures
  45. Smallflower Morningglory Control by Glyphosate Alone and Mixed with Residual Herbicides
  46. Asiatic Dayflower
  47. Asiatic Dayflower Control by Glyphosate & Glyphosate/Staple Mixtures. Grady Co., 2000.
  48. Asiatic Dayflower Control by Glyphosate Mixtures at Layby. Grady Co., 2000.
  49. Asiatic Dayflower Control by Conventional Layby Herbicides. Grady Co., 2000.
  50. Hemp Sesbania
  51. Hemp Sesbania Control by Glyphosate. Tifton, 2000.
  52. Breakout Session Objectives - Glyphosate/tank mixes
  53. Glyphosate + Tank Mix Partner
  54. Tank Mix Partners-Early Season
  55. RR Cotton Injury from Glyphosate/Staple Mixtures
  56. Cotton Injury from Glyphosate/Staple Combinations. Tifton, 2000.
  57. Tank Mix Partners-Early Season
  58. Do Not Use Dual PRE on Georgia Soils
  59. Tank Mix Partners-Early Season
  60. Tank Mix Partners-Late Season
  61. Tank Mix Partners
  62. Tank Mix Partners
  63. Texas Panicum Control by Glyphosate Alone and in Mixture with Residual Herbicides
  64. Palmer Amaranth Control by Glyphosate Alone and in Mixture with Residual Herbicides
  65. Pictures
  66. Should I Direct Glyphosate in RR Cotton?
  67. Breakout Session Objectives - Replacing Bladex
  68. Cyanazine Availability
  69. Cyanazine (Bladex, Cy-Pro)
  70. Replace Cyanazine?
  71. Smallflower Morningglory Control by Conventional Layby Herbicides. Turner Co., 2000.
  72. Tropic Croton Control by Conventional Layby Herbicides. Turner Co., 2000.
  73. Sicklepod Control Comparison of Caparol and Direx. Tifton, 2000.
  74. Smallflower Morningglory Control Comparison of Caparol and Direx. Tifton, 2000.
  75. Palmer Amaranth Control Comparison of Caparol and Direx. Tifton, 2000.
  76. Hemp Sesbania Control Comparison of Caparol and Direx. Tifton, 2000.
  77. Replace Cyanazine?
  78. Breakout Session Objectives - Cadre carryover
  79. Cadre carryover - Picture
  80. Cadre carryover
  81. Breakout Session Objectives - DNA application timing in strip-till
  82. Large Crabgrass Control by Various Application Methods of Prowl.
  83. Slender Amaranth Control by Various Application Methods of Prowl.
  84. Breakout Session Objectives - Layby applications in liquid N
  85. Cotton Injury from Directed Herbicides in Water and Water/N Mixtures. Tifton, 2000.
  86. Things to Come



SLIDE CONTENTS
  1. PPT Slide Cotton Production Workshop A. Stanley Culpepper
  2. Breakout Session Objectives 1. New labels or uses 2. RR cotton tolerance to glyphosate 3. Managing weeds that are difficult to control in RR cotton 4. Glyphosate/tank mixes 5. Replacing Bladex 6. Cadre carryover 7. DNA application timing in strip-till 8. Layby applications in liquid N
  3. New Labels or Uses 1. Paraquat formulations: Boa (2.5 lb ai) Gramoxone Extra (2.5 lb ai) Gramoxone Max (3.0 lb ai) 2. Glyphosate formulations:
  4. Glyphosate Formulations* Acquire Credit DuPont Glyphosate Gly-Flo Glyfos Glyfos X-TRA Glyphomax Glyphomax Plus Glyphosate Original Rattler Roundup D-Pak Roundup Original Roundup Ultra Roundup UltraDry Roundup UltraMax Touchdown *Products in orange may be applied overtop of RR cotton according to label.
  5. PPT Slide Roundup Ready Cotton Tolerance to Roundup, Touchdown, and Touchdown 5. Clayton, NC. 2000.* Roundup Ultra 0 0 Touchdown 0 0 Touchdown 5 39 63 % injury 1 application 2 applications *Glyphosate applied at 1 lb ai/A. ACY
  6. Morningglory Control in RR Cotton by Harvade Mixtures. Attapulgus, GA. 2000.* Roundup Ultra 84 Roundup + Harvade 92 Roundup + Harvade + COC 99 Harvade + MSMA + COC 99 Smallflower morningglory *Roundup Ultra 2 pt/A; Harvade 6 oz/A when mixed with RU and 10 oz/A when mixed with MSMA; MSMA 2.67 pt/A
  7. Breakout Session Objectives 1. New labels or uses 2. RR cotton tolerance to glyphosate
  8. Transgenic Cotton Acreage in Georgia 32 32 64 %
  9. PPT Slide Lint Cotton Yields in RR Cotton when Treated Topically with Glyphosate at Various Growth Stages 1) Ten plants per plot were hand harvested on October 10, 1999 in Moultrie, GA. 2) Roundup Ultra applied at 1 qt/A broadcast over-the-top. Conventional plots treated with standard herbicide system. a a a b
  10. PPT Slide Glyphosate Overtop After 4th Leaf Stage Can cause boll shed, delay maturity Salvage treatment only
  11. Is Stem Absorption of Glyphosate Directed in RR Cotton a Concern? No noted concerns with precision applications in field trials Lab data from North Carolina, Georgia, and Mississippi? What about sloppy directed applications?
  12. Cotton Yield After Various Glyphosate Applications. Moultrie, 2000.* *Glyphosate applied at 1.0 lb ai/A. PD = precision directed at cotyledons; SD = sloppy directed 33 to 40% up the plant. Standard system = Prowl + Cotoran fb Staple fb Caparol + MSMA. LSD = 55 Lint yield (Lb/A) Standard system Topical 1- & 4-lf Topical 4-lf PD 8- & 12-lf Topical 4-lf SD 8- & 12-lf a a a b b Topical 1-, 4-, & 12-lf
  13. PPT Slide Directing Glyphosate in RR Cotton? Precision PD or hooded sprayers
  14. PPT Slide Directing Glyphosate in RR Cotton? Precision PD or hooded sprayers Direct spray to the base of the cotton plants
  15. PPT Slide
  16. PPT Slide Directing Glyphosate in RR Cotton? Precision PD or hooded sprayers Direct spray to the base of the cotton plants Contact of spray with cotton leaves should be avoided to the maximum extent possible
  17. PPT Slide
  18. PPT Slide
  19. PPT Slide
  20. PPT Slide
  21. PPT Slide Directing Glyphosate in RR Cotton? Precision PD or hooded sprayers Direct spray to the base of the cotton plants Contact of spray with cotton leaves should be avoided to the maximum extent possible Place nozzles in low position directing a horizontal spray pattern under the cotton leaves to contact weeds in the row
  22. PPT Slide
  23. PPT Slide
  24. PPT Slide
  25. PPT Slide Precision and Sloppy Applied Glyphosate
  26. PPT Slide Precision and Sloppy Applied Glyphosate
  27. Breakout Session Objectives 1. New labels or uses 2. RR cotton tolerance to glyphosate 3. Managing weeds that are difficult to control in RR cotton
  28. PPT Slide Weeds Difficult to Control by Glyphosate?
  29. PPT Slide Cutleaf Eveningprimrose Response to Burndown Herbicides Treatment Rating Gramoxone F Gramoxone + Direx G Glyphosate F Glyphosate + Direx G Glyphosate + Harmony Extra F-G Glyphosate + Clarity G Glyphosate + 2,4-D E
  30. Cutleaf Eveningprimrose Control by Glyphosate and 2,4-D. Tifton, 2000.* % control *Roundup Ultra applied at 1 qt/A. Ratings 24 days after treatment. glyphosate 2,4-D
  31. Cutleaf Eveningprimrose Fresh Weights After Treating with Burndown Herbicides. Tifton, 2000.* Grams/plot *Fresh weights taken from 12 plants per plot. Roundup Ultra applied at 2 pt/A and 2,4-D at 1 pt/A.
  32. 2,4-D Burndown for Cotton (from fallow land section of labels) No specific language concerning cotton Do not plant any crop in treated fallow land until 3 months after treatment or until chemical has disappeared from soil
  33. Current Recommendations -- 2,4-D Burndown for Cotton 1 pt/acre Alone or mixed with glyphosate Applied 45 days before planting Research to date shows effectiveness and crop safety
  34. Cotton Injury from 2.1 mls Per Acre of 2,4-D. Tifton, 2000.
  35. PPT Slide Weeds Difficult to Control by Glyphosate?
  36. PPT Slide USE A DNA HERBICIDE
  37. Florida Pusley Control with Glyphosate and Glyphosate Tank Mixtures. Tifton, 2000.* % control 87 bc 92 ab 99 a 81 bc *Florida pusley 2 inches. Roundup UltraMAX applied at 1.25 pt; 2,4-D at 1 pt; Direx or Caparol at 1.5 pt.
  38. PPT Slide Weeds Difficult to Control by Glyphosate?
  39. PPT Slide Controlling Yellow and Purple Nutsedge? Nutsedge Control Programs: 1) 2 applications of glyphosate prior to 5th leaf followed by conventional chemistry including 2 lb ai MSMA directed 2) 1 application of glyphosate prior to 5th leaf followed by conventional chemistry including 2 lb ai MSMA directed 3) 2 applications of glyphosate 4) Zorial or Staple?????
  40. Yellow and Purple Nutsedge Control by Glyphosate. Greenhouse. Glyphosate (lb) *Purple nutsedge controlled significantly greater than yellow nutsedge. 42 42 81 77 90 82 % control * * 70 98 * LSD=10
  41. Yellow and Purple Nutsedge Control by MSMA. Greenhouse. MSMA (lb) *Yellow nutsedge controlled significantly greater than purple nutsedge. 48 42 61 49 82 69 % control * * LSD=10
  42. PPT Slide Weeds Difficult to Control by Glyphosate?
  43. PPT Slide Mid-Season Morningglory Control by Glyphosate & Glyphosate/Staple Mixtures. Moultrie, 2000. Things to consider? 1. Morningglory size at time of application (5 inches here). 2. Will you post-direct with conventional chemistry or glyphosate? Glyphosate 73 89 Glyphosate + Staple 93 97 Pitted Smallflower morningglory morningglory
  44. PPT Slide Glyphosate/Staple Tank Mixtures DuPont label allows tank mix of 1.5 pt of Roundup Ultra plus 0.6 oz of Staple per acre broadcast DuPontís Staple Plus
  45. PPT Slide Smallflower Morningglory Control by Glyphosate Alone and Mixed with Residual Herbicides; Attapulgus, 2000. % control Smallflower mg 4 to 5 inches; irrigated environment Roundup (2 pt/A), Bladex (1.5 pt/A), Caparol (1.5 pt/A), Direx (1.5 pt/A), Valor (2 oz/A) a b a a a
  46. PPT Slide Weeds Difficult to Control by Glyphosate?
  47. Asiatic Dayflower Control by Glyphosate & Glyphosate/Staple Mixtures. Grady Co., 2000.* % control *Dayflower 1 to 5 inches. Ratings 30 days after treatment. Roundup Ultra applied at 1.5 pt/A and Staple at 0.6 oz/A. 67 90 Glyphosate Glyphosate + Staple
  48. Asiatic Dayflower Control by Glyphosate Mixtures at Layby. Grady Co., 2000.* % control LSD = 10 *Dayflower 1 to 5 inches. Ratings taken 30 days after directing in 8 to 10 inch cotton. Roundup Ultra, Caparol, and Direx applied at 1.5 pt/A. Cobra, Harvade, and Valor applied at 8 oz/A, 8 oz/A, and 2 oz/A, respectively. 67 80 86 81 76 85
  49. Asiatic Dayflower Control by Conventional Layby Herbicides. Grady Co., 2000.* % control 80 90 84 82 78 78 90 LSD = 9 91 85 *Dayflower 1 to 5 inches. Ratings taken 30 days after directing in 8 to 10 inch cotton. Bladex, Caparol, Cotoran, and Direx applied at 2 pt/A. Cobra, Harvade, Linex, MSMA, and Valor applied at 9.6 oz/A, 9 oz/A, 1.5 pt/A, 2.67 pt/A, and 2 oz/A, respectively.
  50. PPT Slide Weeds Difficult to Control by Glyphosate?
  51. Hemp Sesbania Control by Glyphosate. Tifton, 2000.* % control *Roundup Ultra applied at 2 pt/A. Experiment conducted under center irrigation. 3 inches 7 inches 86 59
  52. Breakout Session Objectives 1. New labels or uses 2. RR cotton tolerance to glyphosate 3. Managing weeds that are difficult to control in RR cotton 4. Glyphosate/tank mixes
  53. PPT Slide Glyphosate + Tank Mix Partner 1. Increase morningglory control 2. Increase dayflower control 3. Residual weed control
  54. PPT Slide Tank Mix Partners-Early Season 1. Staple
  55. PPT Slide RR Cotton Injury from Glyphosate/Staple Mixtures
  56. Cotton Injury from Glyphosate/Staple Combinations. Tifton, 2000.* *Glyphosate applied at 0.75 lb ai/A. Staple applied at 0.6 oz/A. Cotton 4-leaf at time of application. LSD = 4 % injury
  57. PPT Slide Tank Mix Partners-Early Season 1. Staple* 2. Dual Magnum *Labeled tank mix with Roundup
  58. PPT Slide Dual PRE Do Not Use Dual PRE on Georgia Soils
  59. PPT Slide Tank Mix Partners-Early Season 1. Staple* 2. Dual Magnum 3. MSMA *Labeled tank mix with Roundup
  60. PPT Slide Tank Mix Partners-Late Season 1. Diuron* 6. Harvade* 2. Caparol 7. MSMA 3. Cyanazine* 8. Dual Magnum 4. Cotoran 9. Prowl* 5. Cobra *Label supports tank mix with Roundup
  61. PPT Slide Tank Mix Partners Consider... weed species and sizes, economics, cotton stage, environment??
  62. PPT Slide Tank Mix Partners Consider... weed species and sizes, economics, cotton stage, environment?? DONíT FORGET ABOUT ANTAGONISM
  63. PPT Slide Texas Panicum Control by Glyphosate Alone and in Mixture with Residual Herbicides. Ponder Farm, 1999. % control Texas panicum 6 to 9 inches; fair to dry environment Roundup (2 pt/A), Bladex (1.5 pt/A), Caparol (1.5 pt/A), Direx (1.5 pt/A), Valor (2 oz/A) a b ab a b
  64. PPT Slide Palmer Amaranth Control by Glyphosate Alone and Mixed with Residual Herbicides. Attapulgus, 2000. % control Palmer amaranth 4 to 7 inches; irrigated environment Roundup (2 pt/A), Bladex (1.5 pt/A), Caparol (1.5 pt/A), Direx (1.5 pt/A), Valor (2 oz/A) ab a b b ab
  65. PPT Slide Roundup Ultra (1 qt/A) + Caparol (1.5 pt/A)
  66. PPT Slide Glyphosate preferred for grasses and perennials Otherwise, conventional chemistry preferred 1. Better morningglory and dayflower control 2. Residual weed control 3. Resistant management strategy 4. Avoid weed shifts 5. Reduce risk of boll shed Should I Direct Glyphosate in RR Cotton?
  67. Breakout Session Objectives 1. New labels or uses 2. RR cotton tolerance to glyphosate 3. Managing weeds that are difficult to control in RR cotton 4. Glyphosate/tank mixes 5. Replacing Bladex
  68. PPT Slide Manufacturing ceased in 1999 Availability in 2001: 0, 40, 50????? Bladex label: May not be sold or distributed after Sept. 30, 2002. May not be used after December 31, 2002. Do not apply more than 1.0 qt/A (1.0 lb ai/A). An enclosed cab is required. Cyanazine Availability
  69. PPT Slide Controls most troublesome broadleaf weeds when mixed with MSMA Cotton tolerance acceptable if applied timely and precisely Residual weed control for several weeks Cyanazine (Bladex, Cy-Pro)
  70. PPT Slide Other mid-season post-directed herbicide options: 1) Dual 2) Prowl 3) MSMA or DSMA 4) Cobra 5) Harvade 6) Goal 7) fluometuron (Cotoran, Meturon) 8) prometryn (Caparol, Cotton-Pro) 9) diuron (Karmex, Direx) Replace Cyanazine?
  71. Smallflower Morningglory Control by Conventional Layby Herbicides. Turner Co., 2000.* % control 64 81 90 64 97 99 78 LSD = 13 91 76 *Morningglory 6 to 8 inches. Ratings taken 30 days after directing in 8 to 10 inch cotton. Bladex, Caparol, Cotoran, and Direx applied at 2 pt/A. Cobra, Harvade, Linex, MSMA, and Valor applied at 9.6 oz/A, 9 oz/A, 1.5 pt/A, 2.67 pt/A, and 2 oz/A, respectively.
  72. Tropic Croton Control by Conventional Layby Herbicides. Turner Co., 2000.* % control *Croton 2 to 6 inches. Ratings taken 30 days after directing in 8 to 10 inch cotton. Bladex, Caparol, Cotoran, and Direx applied at 2 pt/A. Cobra, Harvade, Linex, MSMA, and Valor applied at 9.6 oz/A, 9 oz/A, 1.5 pt/A, 2.67 pt/A, and 2 oz/A, respectively. 60 83 97 55 92 99 67 LSD = 12 91 61
  73. Sicklepod Control Comparison of Caparol and Direx. Tifton, 2000.* % control *All treatments included MSMA at 2 lb ai/A and 0.25% v/v NIS.
  74. Smallflower Morningglory Control Comparison of Caparol and Direx. Tifton, 2000.* % control *All treatments included MSMA at 2 lb ai/A and 0.25% v/v NIS.
  75. Palmer Amaranth Control Comparison of Caparol and Direx. Tifton, 2000.* % control *All treatments included MSMA at 2 lb ai/A and 0.25% v/v NIS.
  76. Hemp Sesbania Control Comparison of Caparol and Direx. Tifton, 2000.* % control *All treatments included MSMA at 2 lb ai/A and 0.25% v/v NIS.
  77. PPT Slide Other mid-season post-directed herbicide options: prometryn (Caparol, Cotton-Pro) diuron (Karmex, Direx) Weed control - most weeds? Residual weed control - most weeds? Carryover? experiments being conducted Replace Cyanazine?
  78. Breakout Session Objectives 1. New labels or uses 2. RR cotton tolerance to glyphosate 3. Managing weeds that are difficult to control in RR cotton 4. Glyphosate/tank mixes 5. Replacing Bladex 6. Cadre carryover
  79. PPT Slide Cadre carryover Non-treated
  80. PPT Slide Cadre Carryover 11 cultivars compared for tolerance including Delta Pearl, DP 33 B, DP 5415, DP 458, ST 4892, STX 9903, BXN 47, FM 989, AP 6101, GA 161, SG 125. 1) no difference in plant stand 2) visual injury similar among cultivars 3) vigor reductions similar among cultivars 4) plant height reductions similar among cultivars
  81. Breakout Session Objectives 1. New labels or uses 2. RR cotton tolerance to glyphosate 3. Managing weeds that are difficult to control in RR cotton 4. Glyphosate/tank mixes 5. Replacing Bladex 6. Cadre carryover 7. DNA application timing in strip-till
  82. PPT Slide Large Crabgrass Control by Various Application Methods of Prowl. Rocky Mount, NC. 2000.* % control 14 b 66 a ACY Early pre-plant Before strip-tillage 79 a After planting *Roundup applied early pre-plant and at planting. Ratings taken 16 days after planting. EPP applied 21 d prior to planting.
  83. PPT Slide Slender Amaranth Control by Various Application Methods of Prowl. Clayton, NC. 2000.* % control 40 c 66 b *Roundup applied early pre-plant and at planting. Ratings taken 28 days after planting. EPP applied 21 d prior to planting. ACY Early pre-plant After planting 97 a Before strip-tillage
  84. Breakout Session Objectives 1. New labels or uses 2. RR cotton tolerance to glyphosate 3. Managing weeds that are difficult to control in RR cotton 4. Glyphosate/tank mixes 5. Replacing Bladex 6. Cadre carryover 7. DNA application timing in strip-till 8. Layby applications in liquid N
  85. Cotton Injury from Directed Herbicides in Water and Water/N Mixtures. Tifton, 2000.* *All treatments included MSMA at 2 lb ai/A. N mixtures were half water and half 30% N. Ratings taken 3 wk after treatment. Cotton 8 to 10 inches at time of application. LSD = 7 % injury
  86. Things to Come 1. Valor 2. Liberty Link Cotton 3. CGA 362-622 4. Enhanced Roundup Ready Cotton