Slide Presentation

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

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TABLE OF CONTENTS
  1. Impact of Transgenics on Consultants/Extension: Weed Management
  2. Adoption of Roundup Ready
  3. Direct Correlation (1997-2002)
  4. Glyphosate-Resistant Horseweed (mares tail)
  5. Glyphosate-Resistant Horseweed
  6. Time of Horseweed Germination
  7. Adoption of Roundup Ready vs Value of Those Giving Weed Control Recommendations
  8. Percent of cotton acreage planted to RR varieties
  9. Percent of cotton acreage planted to RR varieties
  10. Adoption of Roundup Ready vs Value of Those Giving Weed Control Recommendations
  11. Herbicide-Resistant Weeds Challenging Cotton Growers
  12. WeatherMax 22 oz, 2 d after application to 16 inch Palmer
  13. Distribution of Glyphosate-Resistant Palmer Amaranth (2006)
  14. Amaranthus palmeri 2009
  15. Value of Extension/Consultants is Changing Where GR Palmer is Present
  16. Weathermax 88 oz; Staple LX 10 oz
  17. What Do We Recommend?
  18. Herbicides Alone Will Not Manage This Pest In Some Production Practices
  19. Developing Integrated Management for the Control of Glyphosate-Resistant Palmer amaranth in Roundup Ready Cotton
  20. GR Palmer amaranth control at harvest with Roundup-based systems
  21. Palmer amaranth response to deep tillage
  22. Palmer amaranth response to cover crops
  23. Palmer amaranth response to deep tillage and cover crops
  24. Dryland Conservation Tillage
  25. Palmer amaranth
  26. Ignite 23 oz/A
  27. Palmer amaranth
  28. Apply 29 oz of Ignite Prior to 3 inch Palmer
  29. What makes Palmer a super weed?
  30. Weakness of a super weed?
  31. Management Program For Glyphosate-Resistant Palmer Amaranth if Things Are Not Perfect
  32. Glyphosate-Resistant Ragweed
  33. 96 oz WeatherMax
  34. Giant Ragweed Control with Ignite or Roundup
  35. Glyphosate-Resistant Ryegrass
  36. Glyphosate-Resistant Ryegrass
  37. Georgia producers adopt changes
  38. Managing Glyphosate-Resistant
  39. Prevent Resistance to Other Classes of Chemistry
  40. Future Technology: 2,4-D or Dicamba Resistant Cotton
  41. Ignite vs Ignite + 2,4-D 0.75 lb
  42. Ignite vs Ignite + dicamba 0.5 lb
  43. Are You Comfortable Making 2,4-D or Dicamba In-Crop Cotton Weed Management Recommendations TODAY?
  44. Which Are You More Concerned About for 2,4-D amine?
  45. Which Are You More Concerned About for DICAMBA (Clarity)?
  46. QUESTIONS?



SLIDE CONTENTS
  1. Impact of Transgenics on Consultants/Extension: Weed Management Culpepper
  2. 97 98 99 00 01 Adoption of Roundup Ready (Millions of Acres) 67%
  3. Adoption of Roundup Ready Value of Those Giving Weed Control Recommendations DIRECT CORRELATION (1997-2002)
  4. Glyphosate-Resistant Horseweed (mares tail) Wind-borne seed; moves long distances Slow increase during 2003-2007 Photo by R. Hayes
  5. Photo credit: Larry Steckel
  6. Time of Horseweed Germination Plants/ Sq ft 5 10 15 0 20 Koger 2004
  7. Adoption of Roundup Ready Value of Those Giving Weed Control Recommendations 2003-2006
  8. 100 66 97 99 98 98 98 99 99 100 98 98 83 97 75 97 59 Percent of cotton acreage planted to RR varieties. 20061 1USDA, AMS. 2006. Publ. mp-cn833.
  9. >99% >99% 100% 96% 100% 100% 99% 98% 85% 99% Percent of cotton acreage planted to RR varieties. 20091 1USDA, AMS. 2009. Publ. mp-cn833. 99% 87% 97%
  10. Adoption of Roundup Ready Value of Those Giving Weed Control Recommendations 2006-2009
  11. Palmer amaranth Common waterhemp Johnsongrass Ryegrass Ragweed – common and giant Herbicide-Resistant Weeds Challenging Cotton Growers Resistance to glyphosate in all of the listed weeds is the primary issue as well as ALS resistance in several of the species.
  12. WeatherMax 22 oz, 2 d after application to 16 inch Palmer
  13. Distribution of Glyphosate-Resistant Palmer Amaranth (2006)
  14. Amaranthus palmeri 2009
  15. Value of Extension/Consultants is Changing Where GR Palmer is Present Glyphosate 3 times 2006 University of Georgia Ponder Farm Glyphosate 3 times 2009
  16. Weathermax 88 oz Staple LX 10 oz
  17. What Do We Recommend? Conventional Irrigated? Conventional Dryland? Conservation Tillage Irrigated? Conservation Tillage Dryland -- Major Challenge!!!!!
  18. Staple + Reflex + Direx PRE Roundup WMax + Parrlay POST Direx + MSMA Layby Herbicides Alone Will Not Manage This Pest In Some Production Practices
  19. Developing Integrated Management for the Control of Glyphosate-Resistant Palmer amaranth in Roundup Ready Cotton
  20. 81 b No deep turn No Cover Deep turn No cover Rye 7 foot when killed, rolled, planted. Deep turn 12 inch in previous fall. Herbicide program: Direx + Reflex + Staple PRE; RU + Parrlay POST, Direx + MSMA at layby. percent 63 c 80 b 98 a GR Palmer amaranth control at harvest with Roundup-based systems. Macon Co., GA 2009. No deep turn Rye Cover Deep turn Rye Cover
  21. Staple + Reflex + Direx PRE Roundup WMax + Parrlay POST Direx + MSMA Layby No deep tillage No cover crop Deep tillage No cover crop Palmer amaranth response to deep tillage. Macon County, GA. 2009.
  22. Staple + Reflex + Direx PRE Roundup WMax + Parrlay POST Direx + MSMA Layby No deep tillage No cover crop No deep tillage Rye cover crop Palmer amaranth response to cover crops. Macon County, GA. 2009.
  23. Staple + Reflex + Direx PRE Roundup WMax + Parrlay POST Direx + MSMA Layby No deep tillage No cover crop Deep tillage Rye cover crop Palmer amaranth response to deep tillage and cover crops. Macon County, GA. 2009.
  24. Dryland Conservation Tillage Prowl + Reflex PRE Roundup + Dual POST Direx + MSMA PD Prowl + Reflex PRE Ignite + Dual POST Direx + MSMA PD
  25. Ignite 23 oz/A
  26. APPLY 29 OZ OF IGNITE PRIOR TO 3 INCH PALMER
  27. What makes Palmer a super weed? Herbicide resistance? Growth rate? Large stature? Competitive ability? Reducing harvest efficacy? Seed production? Rapid spread?
  28. Weakness of a super weed? Emergence depth! Seed life longevity? Light requirement for emergence. Economic survival will depend on managing the seedbank!!!!
  29. Management Program For Glyphosate-Resistant Palmer Amaranth if Things Are Not Perfect
  30. Glyphosate-Resistant Ragweed (giant and common)
  31. 96 oz WeatherMax North Carolina
  32. PowerMax 22 oz 2 leaf PowerMax 22 oz 5 leaf Ignite 29 oz 2 leaf Ignite 29 oz 5 leaf Giant Ragweed Control with Ignite or Roundup. TN, 2009.
  33. Glyphosate-Resistant Ryegrass
  34. 2006 Georgia producers adopt changes 2008
  35. Managing Glyphosate-Resistant Accepting the seriousness of the situation Overcoming “it wont happen to me” Be aggressive and preventive
  36. Prevent Resistance to Other Classes of Chemistry PPO’s (Valor and Reflex especially) Ignite
  37. Future Technology: 2,4-D or Dicamba Resistant Cotton 2,4-D resistant cotton 2,4-D sensitive cotton
  38. Ignite Ignite + 2,4-D 0.75 lb 12 DAT
  39. Ignite Ignite + dicamba 0.5 lb 12 DAT
  40. Are You Comfortable Making 2,4-D or Dicamba In-Crop Cotton Weed Management Recommendations TODAY? A. YES (for both) NO (for both) C. YES for 2,4-D D. YES for DICAMBA (CLARITY)
  41. Which Are You More Concerned About for 2,4-D amine? DRIFT VOLATILITY C. TANK CONTAMINATION
  42. Which Are You More Concerned About for DICAMBA (Clarity)? DRIFT VOLATILITY C. TANK CONTAMINATION
  43. QUESTIONS?