Slide Presentation

TITLE    (click title to view slides)
New Developments in Weed Control (2009)

AUTHOR
Eric P. Prostko
Extension Weed Specialist
Department of Crop and Soil Sciences
University of Georgia

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TABLE OF CONTENTS
  1. New Developments in Weed Control (2009)
  2. New (er) Products
  3. Resolve Q
  4. Accent vs. Resolve Q
  5. Laudis 3.5SC
  6. Laudis vs. Accent - I
  7. Laudis vs. Accent - II
  8. Halex GT
  9. Halex GT in Field Corn - 2008
  10. Generic Accent’s (nicosulfuron)
  11. Optimum® GAT® Technology Glyphosate-ALS Tolerance
  12. Optimum® GAT® Field Corn
  13. Liberty-Link Soybeans
  14. KIH-485
  15. Texas Panicum Control in Georgia Field Corn with KIH-485 Applied PRE (Photo @ 53 DAT) - 2007
  16. Wild Radish Control in Georgia Field Corn with KIH-485 Applied PRE (Photo @ 43 DAT) - 2007
  17. GR-Palmer Amaranth Control in Soybeans with PRE’s (2008) - Macon Co.
  18. Herbicide Resistance
  19. Palmer Amaranth Control
  20. Macon County - GR Palmer Amaranth
  21. GR-Pigweed Control in Soybeans - 2008 Macon County - 63 DAT
  22. GR-Pigweed Control in Peanuts - 2008 Macon County - 91 DAP
  23. Pigweed Challenges
  24. May 2008 Rainfall Distribution in Tifton (CPES)
  25. If residual herbicides are not activated on a timely basis with a reliable water source, pigweed control will be very difficult, maybe even impossible!
  26. I need a favor!!!!
  27. We are overusing the PPO inhibiting herbicides!!!!!!!!
  28. GR-Palmer Amaranth Control in Soybeans (Asgrow 4903 RR/STS) with Canopy 75WG @ 6 oz/A applied PRE
  29. GR-Pigweed Control in Soybeans - 2008
  30. GR-Palmer Amaranth Control in Soybeans - 2007
  31. Metribuzin Products on Soybeans
  32. Soybean varieties screened in 2008 that had adequate tolerance to Boundary 6.5EC (2 pt/A), Canopy 75DG (5 oz/A), and Sencor 75DG (6 oz/A).
  33. Crop Rotations
  34. For More Weed Science Info



SLIDE CONTENTS
  1. New Developments in Weed Control (2009) Eric P. Prostko, Ph.D. Extension Weed Specialist Department of Crop & Soil Sciences
  2. New (er) Products Resolve Q Laudis Halex GT Generic Accents Nic-It Samson Optimum GAT Liberty-Link Soybeans KIH-485
  3. Resolve Q Dupont Resolve (rimsulfuron) + Harmony (thifensulfuron) + safener (isoxadifen) 1.25 oz/A + COC or NIS + N POST control but has some residual 20” corn or 7 collars Is it as good as Accent on TX millet in GA????????
  4. Accent vs. Resolve Q CN-12-08 Ponder Farm June 13, 2008 NTC Accent 75WG @ 0.67 oz/A Atrazine 4L @ 1.5 qt/A Peptoil @ 1% v/v Resolve Q @ 1.25 oz/A Atrazine 4L @ 1.5 qt/A Peptoil @ 1% v/v 96 Bu/A 148 Bu/A 148 Bu/A
  5. Laudis 3.5SC Bayer Tembotrione + isoxadifen (safener) “Bleacher” POST 3 oz/A Emergence to V8 stage Requires use of MSO and nitrogen Good for pigweed management Also has crabgrass and BL signalgrass listed on label Is it as good as Accent on TX millet?
  6. Laudis vs. Accent - I CN-03-08 Ponder Farm June 13, 2008 52 DAT NTC Laudis 3.5SC @ 3 oz/A Atrazine 4L @ 2 qt/A Peptoil @ 1% v/v Accent 75DG @ 0.67oz/A Atrazine @ 2 qt/A Peptoil @ 1% v/v
  7. Laudis vs. Accent - II CN-09-08 Attapulgus Farm June 12, 2008 53 DAT NTC Laudis 3.5SC @ 3 oz/A Atrazine 4L @ 1.5 qt/A MSO @ 1% v/v UAN-28% @ 1.5 qt/A Accent 75DG @ 0.67oz/A Atrazine @ 2 qt/A Peptoil @ 1% v/v
  8. Halex GT Syngenta Touchdown + Dual Magnum + Callisto POST 3.6-4.0 pt/A Tank-mix with atrazine Emergence to 30” or 8 leaf stage 12” with atrazine OP Interactions
  9. Halex GT in Field Corn - 2008 Untreated CN-05-08 6/19/2008 83 DAP Halex GT 4.39L 4 pt/A + NIS (POST)
  10. Generic Accent’s (nicosulfuron) NIC-IT Cheminova Formulated as 2SC instead of 75WDG Use rate is 2 oz/A Samson UPI 0.33 ai/gal (SC) Use rate is 12 oz/A Both have not yet been tested in GA
  11. Optimum® GAT® Technology Glyphosate-ALS Tolerance Dupont/Pioneer Glyphosate metabolic inactivation mechanism Gene shuffling Insensitive ALS enzyme Soybean 2009/2010 demonstration plots 2011 Commercial introduction Field corn (2010?) What does it bring to the table? Flexibility
  12. Optimum® GAT® Field Corn NTC Touchdown Total - 24 oz/A Classic – 0.188 oz/A Harmony GT – 0.25 oz/A Express – 0.125 oz/A Callisto – 2.5 oz/A All applied at V3 stage CN-06-08 6/13/2008 16 DAT
  13. Liberty-Link Soybeans Bayer EC approval in September 2008 Launch in 2009 No GA data at this point
  14. KIH-485 Pyroxasulfone Kumiai Developed for corn and soybeans PRE Herbicide Family Sulfonylioxazoline (?) Herbicide Mode of Action (?) plant growth inhibitor that affects apical meristem and coleoptile development of plants after seed germination Low use rates
  15. Texas Panicum Control in Georgia Field Corn with KIH-485 Applied PRE (Photo @ 53 DAT) - 2007 NTC KIH-485 85WG @ 4.2 oz/A (0.223 lb ai/A)
  16. Wild Radish Control in Georgia Field Corn with KIH-485 Applied PRE (Photo @ 43 DAT) - 2007 NTC KIH-485 85WG @ 1.67 oz/A (0.089 lb ai/A)
  17. GR-Palmer Amaranth Control in Soybeans with PRE’s (2008) - Macon Co. NTC KIH-485 85WG @ 4.2 oz/A SB-05-08 48 DAT
  18. Herbicide Resistance
  19. Palmer Amaranth Control Start Clean!!!!! Use a residual!!! Do you have ALS or DNA resistance? Dryland or Irrigated? Spray when plants are small (<3”)
  20. NTC Atrazine 4L @ 1 qt/A – PRE Atrazine 4L @ 1.5 qt/A – 30 DAP Peptoil @ 1% v/v – 30 DAP Macon County – GR Palmer Amaranth June 24, 2008 – 60 DAP CN-01-08
  21. GR-Pigweed Control in Soybeans – 2008 Macon County - 63 DAT NTC Envive 41.3WG @ 3 oz/A
  22. GR-Pigweed Control in Peanuts – 2008 Macon County – 91 DAP NTC Prowl H2O @ 2.1 pt/A (PRE) Valor SX 51WG @ 3 oz/A (PRE) Cadre 2AS @ 4 oz/A (41 DAP)+ Peptoil @ 1% v/v (41 DAP)
  23. Pigweed Challenges Economics drive farmer decisions No real long-term weed mgt. planning just make it to next year Farm logistics Timeliness Dryland production systems
  24. May 2008 Rainfall Distribution in Tifton (CPES) Dryland crops planted before May 9 or after May 16 did not get enough rain to activate residual herbicides!!! 0.33” 0.02” 0.06”
  25. If residual herbicides are not activated on a timely basis with a reliable water source, pigweed control will be very difficult, maybe even impossible!
  26. I need a favor!!!! In soybeans Think about Canopy or Boundary Instead of Valor, Reflex, Prefix Why? PPO resistance management
  27. We are overusing the PPO inhibiting herbicides!!!!!!!! Resistance has already been reported in other areas!!! Common waterhemp 2001 (Kansas) 2002 (Illinois) 2003 (Missouri) Common ragweed 2005 (Delaware) Wild poinsettia 2004 (Brazil)
  28. GR-Palmer Amaranth Control in Soybeans (Asgrow 4903 RR/STS) with Canopy 75WG @ 6 oz/A applied PRE CANOPY NTC SB-05-08 Macon Co. 36 DAT
  29. GR-Pigweed Control in Soybeans - 2008 SB-06-08 Macon County 48 DAP NTC Canopy 75DG @ 6 oz/A + Prowl H2O 3.8ASC @ 2.1 pt/A (PRE)
  30. GR-Palmer Amaranth Control in Soybeans - 2007 SB-01-07 Macon Co. 76 DAP NTC Gramoxone Inteon @ 3 pt/A + Boundary @ 1.8 pt/A + NIS @ 0.25% v/v (7 DBP) Touchdown Total @ 1.5 pt/A (26 DAP)
  31. Metribuzin Products on Soybeans Sencor Boundary Dual Magnum + Sencor Canopy Sencor + Classic Read label Know soil texture and OM Varieties rotations
  32. Soybean varieties screened in 2008 that had adequate tolerance to Boundary 6.5EC (2 pt/A), Canopy 75DG (5 oz/A), and Sencor 75DG (6 oz/A). Ag South AGS 568 Asgrow H7242 Asgrow 4903 RR/STS Delta Pineland DP 5634 Delta Pineland DP 6568 Northrup King NKS 80P2 Northrup King NKS 76L9 Northrup King NKS 78G6 Pioneer 95Y40 Pioneer 95Y70 Pioneer 96M60 Pioneer 97M50 Southern States RT5951 Southern States RT4808 Vigoro V61N9 Vigoro V74N9
  33. Crop Rotations
  34. For More Weed Science Info www.gaweed.com