Slide Presentation

TITLE    (click title to view slides)

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

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TABLE OF CONTENTS
  1. Roundup Ready Cotton Tolerance to Glyphosate
  2. Glyphosate Overtop Prior to 5th Leaf
  3. Glyphosate Overtop After 4th Leaf?
  4. Lint Cotton Yields in RR Cotton when Treated Topically with Glyphosate
  5. Lint Yields (Nodes 5-14) in RR Cotton when Treated Topically with Glyphosate
  6. Unopened Bolls in RR Cotton when Treated with Glyphosate
  7. Glyphosate comparison picture
  8. Glyphosate Overtop after 4th Leaf Stage
  9. Is Stem Absorption of Glyphosate Directed in RR Cotton a Concern?
  10. Precision PD or hooded sprayers - Picture
  11. Direct spray to the base of the cotton plants
  12. Direct spray to the base of the cotton plants - Picture
  13. Contact of spray with cotton leaves should be avoided
  14. Sprayer Picture
  15. Sprayer Picture
  16. Sprayer Picture
  17. Sprayer Picture
  18. Sprayer Picture
  19. Place nozzles in low position
  20. Sprayer Picture
  21. Sprayer Picture
  22. Sprayer Picture
  23. Cotton Yield After Various Glyphosate Applications. Moultrie, 2000.
  24. Number of Bolls on Nodes 5-10 After Various Glyphosate Applications. Moultrie, 2000.
  25. Boll Weights from Nodes 5-10 After Various Glyphosate Applications. Moultrie, 2000.
  26. Number of Bolls on Nodes After Various Glyphosate Applications. Moultrie, 2000.
  27. Boll Weights from Nodes After Various Glyphosate Applications. Moultrie, 2000.
  28. Number of Vegetative Bolls After Various Glyphosate Applications. Moultrie, 2000.
  29. Vegetative Boll Weights After Various Glyphosate Applications. Moultrie, 2000.
  30. Precision and Sloppy applied Glyphosate - Picture
  31. Precision and Sloppy applied Glyphosate - Picture
  32. Directing after 4-leaf stage?
  33. Directing after 4-leaf stage?
  34. Cutleaf Eveningprimrose
  35. Cutleaf Eveningprimrose Response to Burndown Herbicides
  36. Cutleaf Eveningprimrose Control by Glyphosate. Tifton, 2000.
  37. Cutleaf Eveningprimrose Control by 2,4-D. Tifton, 2000.
  38. Cutleaf Eveningprimrose Fresh Weights After Treating with Burndown Herbicides. Tifton, 2000.
  39. 2,4-D Burndown for Cotton (from fallow land section of labels)
  40. Current Recommendations -- 2,4-D Burndown for Cotton
  41. Cotton Injury from 2.1 mls Per Acre of 2,4-D. Tifton, 2000.
  42. Florida Pusley
  43. Florida Pusley - Use a DNA Herbicide
  44. Florida Pusley Control with Glyphosate and Glyphosate Tank Mixtures. Tifton, 2000.
  45. Yellow and Purple Nutsedge
  46. Yellow and Purple Nutsedge Control Programs
  47. Yellow and Purple Nutsedge Control by Glyphosate. Greenhouse.
  48. Yellow and Purple Nutsedge Control by MSMA. Greenhouse.
  49. Morningglory
  50. Mid-Season Morningglory Control by Glyphosate & Glyphosate/Staple Mixtures
  51. Glyphosate/Staple Tank Mixtures
  52. Smallflower Morningglory Control by Glyphosate Alone and Mixed with Residual Herbicides
  53. Asiatic Dayflower
  54. Asiatic Dayflower Control by Glyphosate & Glyphosate/Staple Mixtures. Grady Co., 2000.
  55. Asiatic Dayflower Control by Glyphosate Mixtures at Layby. Grady Co., 2000.
  56. Asiatic Dayflower Control by Conventional Layby Herbicides. Grady Co., 2000.
  57. Hemp Sesbania
  58. Hemp Sesbania Control by Glyphosate. Tifton, 2000.
  59. Glphosate + Tank Mix Partner
  60. Tank Mix Partners - Early Season
  61. RR Cotton Injury from Glyphosate/Staple Mixtures
  62. Tank Mix Partners - Early Season
  63. Tank Mix Partners -Late Season
  64. Tank Mix Partners
  65. Tank Mix Partners
  66. Tank Mix Partners
  67. Texas Panicum Control by Glyphosate Alone and in Mixture with Residual Herbicides
  68. Crowfootgrass Control by Glyphosate Alone and in Mixture with Residual Herbicides
  69. Bristly Starbur Control by Glyphosate Alone and in Mixture with Residual Herbicides
  70. Palmer Amaranth Control by Glyphosate Alone and in Mixture with Residual Herbicides
  71. Glyphosate Comparision Picture
  72. What's Wrong with my Cotton



SLIDE CONTENTS
  1. PPT Slide RR Cotton Tolerance to Glyphosate and Managing Difficult to Control Weeds A. Stanley Culpepper
  2. Glyphosate Overtop Prior to 5th Leaf 1. 2 applications 2. applications 10 days apart 3. 2 nodes of growth
  3. Glyphosate Overtop After 4th Leaf?
  4. 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 b
  5. PPT Slide Lint Yields (Nodes 5-14) 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 b
  6. PPT Slide Unopened Bolls in RR Cotton when Treated with Glyphosate Topically 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.
  7. PPT Slide Glyphosate 9-leaf No Glyphosate
  8. PPT Slide Glyphosate Overtop After 4th Leaf Stage Can cause boll shed, delay maturity Salvage treatment only
  9. Is Stem Absorption of Glyphosate Directed in RR Cotton a Concern? No noted concerns in field trials Lab data from North Carolina, Georgia, and Mississippi?
  10. PPT Slide Directing Glyphosate in RR Cotton? Precision PD or hooded sprayers
  11. PPT Slide Directing Glyphosate in RR Cotton? Precision PD or hooded sprayers Direct spray to the base of the cotton plants
  12. PPT Slide
  13. 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
  14. PPT Slide
  15. PPT Slide
  16. PPT Slide
  17. PPT Slide
  18. PPT Slide
  19. 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
  20. PPT Slide
  21. PPT Slide
  22. PPT Slide
  23. 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
  24. Number of Bolls on Nodes 5-10 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 = 52 Standardsystem Topical 1- & 4-lf Topical 4-lf PD 8- & 12-lf Topical 4-lf SD 8- & 12-lf a a a b # of bolls/ 6 feet
  25. Boll Weights from Nodes 5-10 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 = 52 Grams/6 feet Standardsystem Topical 1- & 4-lf Topical 4-lf PD 8- & 12-lf Topical 4-lf SD 8- & 12-lf a a a b
  26. Number of Bolls on Nodes ᡂ 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 = NS Standardsystem Topical 1- & 4-lf Topical 4-lf PD 8- & 12-lf Topical 4-lf SD 8- & 12-lf a a a a # of bolls/6 feet
  27. Boll Weights from Nodes ᡂ 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 = NS Grams/6 feet Standardsystem Topical 1- & 4-lf Topical 4-lf PD 8- & 12-lf Topical 4-lf SD 8- & 12-lf a a a a
  28. Number of Vegetative Bolls 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 = 4 # of bolls/6 feet Standardsystem Topical 1- & 4-lf Topical 4-lf PD 8- & 12-lf Topical 4-lf SD 8- & 12-lf a a a b
  29. Vegetative Boll Weights 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 = 18 Grams/6 feet Standardsystem Topical 1- & 4-lf Topical 4-lf PD 8- & 12-lf Topical 4-lf SD 8- & 12-lf a a a b
  30. PPT Slide Precision and Sloppy Applied Glyphosate
  31. PPT Slide Precision and Sloppy Applied Glyphosate
  32. PPT Slide Directing After 4-leaf Stage? Glyphosate preferred for grasses or perennials Otherwise, conventional chemistry preferred
  33. PPT Slide Directing After 4-leaf Stage? Glyphosate preferred for grasses or perennials Otherwise, conventional chemistry preferred 1. Better morningglory control 2. Residual weed control 3. Resistant management strategy 4. Avoid weed shifts 5. Reduce risk of boll shed
  34. PPT Slide Weeds Difficult to Control by Glyphosate?
  35. 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
  36. Cutleaf Eveningprimrose Control by Glyphosate. Tifton, 2000.* % control *Roundup Ultra applied at 1 qt/A.
  37. Cutleaf Eveningprimrose Control by 2,4-D. Tifton, 2000.* % control *2,4-D applied at 1 qt/A.
  38. 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.
  39. 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
  40. 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
  41. Cotton Injury from 2.1 mls Per Acre of 2,4-D. Tifton, 2000.
  42. PPT Slide Weeds Difficult to Control by Glyphosate?
  43. PPT Slide USE A DNA HERBICIDE
  44. 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.
  45. PPT Slide Weeds Difficult to Control by Glyphosate?
  46. 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?????
  47. 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
  48. 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
  49. PPT Slide Weeds Difficult to Control by Glyphosate?
  50. 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
  51. 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
  52. 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
  53. PPT Slide Weeds Difficult to Control by Glyphosate?
  54. 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
  55. 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
  56. 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.
  57. PPT Slide Weeds Difficult to Control by Glyphosate?
  58. 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
  59. PPT Slide Glyphosate + Tank Mix Partner 1. Increase morningglory control 2. Increase dayflower control 3. Residual weed control
  60. PPT Slide Tank Mix Partners-Early Season 1. Staple
  61. PPT Slide RR Cotton Injury from Glyphosate/Staple Mixtures
  62. PPT Slide Tank Mix Partners-Early Season 1. Staple 2. Dual Magnum 3. MSMA
  63. PPT Slide Tank Mix Partners-Late Season 1. Diuron* 5. Harvade* 2. Caparol 6. MSMA 3. Cyanazine* 7. Dual Magnum 4. Cobra 8. Prowl* *Label supports tank mix with Roundup
  64. PPT Slide Tank Mix Partners Tank mixes 1. crop tolerance 2. POST control 3. residual weed control 4. carryover
  65. PPT Slide Tank Mix Partners Consider... weed species and sizes, economics, cotton stage, environment??
  66. PPT Slide Tank Mix Partners Consider... weed species and sizes, economics, cotton stage, environment?? DONíT FORGET ABOUT ANTAGONISM
  67. 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
  68. PPT Slide Crowfootgrass Control by Glyphosate Alone and in Mixture with Residual Herbicides. Ponder Farm, 1999. % control Crowfootgrass 3 to 6 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 b ab b
  69. PPT Slide Bristly Starbur Control by Glyphosate Alone and Mixed with Residual Herbicides. Attapulgus, 2000. % control Starbur 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) a a b b b
  70. 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
  71. PPT Slide Roundup Ultra (1 qt/A) + Caparol (1.5 pt/A)
  72. PPT Slide Whatís Wrong With My Cotton? Itís got to be bronze wilt or GLYPHOSATE!!!!!!!!!!