Slide Presentation

TITLE    (click title to view slides)
Weed Control Programs in Peanut with Reflex, Sharpen, and Spartan

AUTHOR
Eric P. Prostko and Timothy L. Grey
Professor and Associate Professor
Department of Crop & Soil Sciences
University of Georgia
Tifton, GA

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TABLE OF CONTENTS
  1. Weed Control Programs in Peanut with Reflex, Sharpen, and Spartan
  2. Peanut Production
  3. Potential New Peanut Herbicides?
  4. Spartan (Sulfentrazone) in Peanut
  5. Objective
  6. Materials and Methods Locations
  7. Materials and Methods Treatments
  8. Stages of growth POST Timing
  9. Results
  10. Peanut Stunting -- Tifton
  11. Peanut Stunting --Tifton
  12. Peanut Leaf Burn -- Plains
  13. Spartan 4F @ 8 oz/A Injury
  14. Sharpen 2.85SC @ 2 oz/A Injury
  15. Palmer Amaranth Control --Tifton
  16. Palmer Amaranth Control -- Plains
  17. Annual MG Control --Tifton
  18. Spartan 4F @ 4 oz/A
  19. Strongarm Based Program
  20. Valor Based Program
  21. Strongarm/Valor Based Program
  22. Spartan Based Program
  23. Reflex Based Program
  24. Sharpen Based Program - 1
  25. Sharpen Based Program - 2
  26. Florida Beggarweed Control -- Plains
  27. Plains -- August 1
  28. Peanut Yield (lbs/A) - Tifton
  29. Summary - I
  30. Summary - II
  31. Conclusions
  32. Sharpen 2.85SC @ 2 oz/A - 2010
  33. Questions?



SLIDE CONTENTS
  1. Weed Control Programs in Peanut with Reflex, Sharpen, and Spartan Eric P. Prostko and Timothy L. Grey Professor and Associate Professor Department of Crop & Soil Sciences APRES 2010
  2. Peanut Production Very important to southern region Minor crop to rest of country 1,201,000 planted acres in 2010 Limited R&D for weed control
  3. Potential New Peanut Herbicides?
  4. Spartan (Sulfentrazone) in Peanut F-6285 Crop injury and cotton rotations were the big issues Had a label in 2004 then????
  5. Objective To evaluate the potential use of Spartan, Reflex, and Sharpen for weed control in peanut.
  6. Materials and Methods Locations
  7. Materials and Methods Treatments All programs included Prowl H2O 3.8SC @ 2.1 pt/A (PRE) Cadre 2AS @ 4 oz/A + Agrioil @ 1% v/v (POST) Strongarm 84WG (SG) 0.45 oz/A Valor 51WG (V) 3 oz/A SG + V 0.23 oz/A + 1.5 oz/A (1/2X rates) Spartan 4F (SP) 4, 5, 6, 8 oz/A Reflex 2SL (R) 12 and 16 oz/A Sharpen 2.85SC (SH) 1 and 2 oz/A
  8. Stages of growth POST Timing
  9. Results
  10. Peanut Stunting (%) –Tifton June 23 (25 DAT) LSD 0.10 = 6
  11. Peanut Stunting (%) –Tifton July 23 (55 DAT) LSD 0.10 = 7
  12. Peanut Leaf Burn (%) – Plains June 11 (27 DAT) LSD 0.10 = 4
  13. Spartan 4F @ 8 oz/A Injury June 23 (25 DAT) Tifton
  14. Sharpen 2.85SC @ 2 oz/A Injury June 23 (25 DAT) Tifton
  15. Palmer Amaranth Control (%) –Tifton June 23 (25 DAT) LSD 0.10 = 2
  16. Palmer Amaranth Control (%) – Plains June 11 (27 DAT) LSD 0.10 = 6
  17. Annual MG Control (%) –Tifton June 23 (25 DAT) LSD 0.10 = 5
  18. Spartan 4F @ 4 oz/A June 23 (25 DAT)
  19. Strongarm Based Program NTC Prowl H2O @ 34 oz/A – PRE Strongarm 84WG @ 0.45 oz/A – PRE Cadre 2AS @ 4 oz/A – POST (29 DAP) Agrioil @ 1% v/v – POST (29 DAP) PE-14-09 July 23 56 DAP
  20. Valor Based Program NTC Prowl H2O @ 34 oz/A – PRE Valor 51WG @ 3 oz/A – PRE Cadre 2AS @ 4 oz/A – POST (29 DAP) Agrioil @ 1% v/v – POST (29 DAP) PE-14-09 July 23 56 DAP
  21. Strongarm/Valor Based Program NTC Prowl H2O @ 34 oz/A – PRE Strongarm 84WG @ 0.23 oz/A - PRE Valor 51WG @ 1.5 oz/A – PRE Cadre 2AS @ 4 oz/A – POST (29 DAP) Agrioil @ 1% v/v – POST (29 DAP) PE-14-09 July 23 56 DAP
  22. Spartan Based Program NTC Prowl H2O @ 34 oz/A – PRE Spartan 4F @ 5 oz/A – PRE Cadre 2AS @ 4 oz/A – POST (29 DAP) Agrioil @ 1% v/v – POST (29 DAP) PE-14-09 July 23 56 DAP
  23. Reflex Based Program NTC Prowl H2O @ 34 oz/A – PRE Reflex 2SL @ 16 oz/A – PRE Cadre 2AS @ 4 oz/A – POST (29 DAP) Agrioil @ 1% v/v – POST (29 DAP) PE-14-09 July 23 56 DAP
  24. Sharpen Based Program - 1 NTC Prowl H2O @ 34 oz/A – PRE Sharpen 2.85SC @ 1 oz/A – PRE Cadre 2AS @ 4 oz/A – POST (29 DAP) Agrioil @ 1% v/v – POST (29 DAP) PE-14-09 July 23 56 DAP
  25. Sharpen Based Program - 2 NTC Prowl H2O @ 34 oz/A – PRE Sharpen 2.85SC @ 2 oz/A – PRE Cadre 2AS @ 4 oz/A – POST (29 DAP) Agrioil @ 1% v/v – POST (29 DAP) PE-14-09 July 23 56 DAP
  26. Florida Beggarweed Control (%) – Plains August 1 (80 DAT) LSD 0.10 = 14
  27. Plains – August 1 NTC Prowl H2O @ 34 oz/A – PRE Reflex 2SL @ 12 oz/A – PRE Cadre 2AS @ 4 oz/A – POST (27 DAP) Agrioil @ 1% v/v – POST (27 DAP)
  28. Peanut Yield (lbs/A) - Tifton LSD 0.10 = 455 CV = 7.32
  29. Summary - I Peanut Injury (Tifton) Spartan (8 oz/A), Reflex and Sharpen caused the most peanut injury. Peanut Injury (Plains) Spartan (6 or 8 oz/A) caused the most peanut injury. No injury from Reflex or Sharpen at this location. Palmer amaranth control was = 92% with all treatments. All treatments also included Prowl
  30. Summary - II Spartan @ 4 and 5 ozs/A and Reflex provided less residual control of annual morningglory. Reflex provided less residual control of Florida beggarweed. Peanut Yield (Tifton) When compared to the highest yielding treatments, applications of Spartan @ 8 oz/A, Reflex, and Sharpen resulted in lower yields. Peanut Yield (Plains) No data collected due to excessive weather.
  31. Conclusions Reflex Will not be pursued by Syngenta Rotation restriction for peanut changed to 14 days 10 months on current label Sharpen Too much injury at 2 oz/A! Reduced weed control at 1 oz or less? Spartan Spartan Charge was labeled in 2010 3-3.75 oz/A (coarse soils, <1.5% OM) 3.75 oz/A = Aim 2EC @ 0.65 oz/A + Spartan 4F @ 2.9 oz/A Length of residual control at reduced rates particularly FL beggarweed and tropic croton? Cotton rotation restriction – 12 months
  32. Sharpen 2.85SC @ 2 oz/A - 2010 PE-17-10 June 8 (26 DAT)
  33. 229-392-1034 (cell) eprostko@uga.edu www.gaweed.com