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Peanut Weed Control Update - 2012 (County Extension Agents)

AUTHOR
Eric P. Prostko
Professor and Extension Weed Specialist
University of Georgia

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TABLE OF CONTENTS
  1. Peanut Weed Control Update - 2012 (County Extension Agents)
  2. Topics for Discussion
  3. Cadre; Impose
  4. Cotton/Cadre Carryover Problems Worse in 2011?
  5. What about 2012?
  6. Cotton/Cadre Carryover Problems Worse in 2011?
  7. What about 2012?
  8. Cadre/Impose Rotational Restrictions
  9. If growers cannot or will not use Cadre...
  10. "Cadre-Free" Weed Control Programs
  11. What one man can do, so can another!
  12. Pigweed Control is not impossible!!!!
  13. Palmer Amaranth Control in Peanut - Valor Program
  14. Palmer Amaranth Control in Peanut - Dual (metolachlor) Program
  15. Classic
  16. Peanut Yield Response (lbs/A) to Classic @ 0.5 oz/A (2008-2011)
  17. Georgia Greener Yield Response to Classic (0.5 oz/A): 2011-2012
  18. A New Formulation of Paraquat from Syngenta
  19. Treatments applied 6 DAC; Photo at 3 DAT
  20. The influence of paraquat on peanut yield (lbs/A)
  21. 2012 Peanut Pest Control Rec Changes
  22. Spartan Charge 3.5L
  23. Palmer Amaranth Control in Peanut - Valor vs. Spartan Charge
  24. Sulfentrazone Injury on Peanut - High rates, lighter soils
  25. Potential New Herbicides?
  26. Weed Control in Peanut with Warrant Systems
  27. Palmer Amaranth Control in Peanut with Fierce
  28. Weed Control in Peanut with Pyroxasulfone
  29. New Publication "Peanut Response to Glyphosate"
  30. Future Concerns/Issues
  31. Thanks for Listening!



SLIDE CONTENTS
  1. Peanut Weed Control Update - 2011 (County Extension Agents) Eric P. Prostko Professor and Extension Weed Specialist Department of Crop & Soil Sciences The University of Georgia
  2. Topics for Discussion Cadre Carryover Palmer Control Classic Update Gramoxone Update Changes in 2012 Pest Control Rec’s Charge New Stuff New Publication Future Concerns
  4. Cotton/Cadre Carryover Problems Worse in 2011? **18.59” deficit rainfall
  5. What about 2012? Rainfall (in): June 1 – Nov 30 Tifton Campus Conference Center Month in
  6. Cotton/Cadre Carryover Problems Worse in 2011? **9.76” deficit rainfall
  7. What about 2012? Rainfall (in): June 1 – Nov 30 Statesboro Month in
  8. Cadre/Impose Rotational Restrictions
  9. If growers cannot or will not use Cadre…... weed control costs will probably be higher purple nutsedge will not be controlled Dual Magnum ($10-14/A) but not as effective. Generic metolachlors are cheaper but may not last as long ($5-6/A). Strongarm + Valor Other POST herbicides (Basagran, Blazer, Cobra, Storm) are effective but have some weaknesses and no residual
  10. “Cadre-Free” Weed Control Programs Program 1 Prowl or Sonalan – PPI/PRE Valor (3 oz/A) + Strongarm (0.23 oz/A) – PRE Cobra or Ultra Blazer + Dual Magnum – POST Program 2 Prowl or Sonalan – PPI/PRE Gramoxone + Storm + Dual Magnum – EPOST Cobra or Ultra Blazer + Dual Magnum – POST 2,4-DB as needed in both programs for sicklepod. Will likely need 2 applications.
  11. What one man can do, so can another! Sumter County - June 28, 2011 (Prowl + Valor fb Cadre)
  12. Pigweed Control is not impossible!!!! Common Reasons for Failure: 1) did not start clean 2) did not use a residual 3) residual did not get activated 4) POST applications are too late 5) short arms and deep pockets
  13. Palmer Amaranth Control in Peanut Valor Program PE-26-11 August 25 108 DAP NTC Prowl H20 3.8SC @ 32 oz/A (PRE) Valor 51WG @ 3 oz/A (PRE) Cadre 2AS @ 4 oz/A (POST) COC @ 1% v/v (POST)
  14. Palmer Amaranth Control in Peanut Dual (metolachlor) Program Prowl H20 @ 34 oz/A (2 DAP) Gramoxone Inteon @ 12 oz/A (21 DAP) Storm @ 16 oz/A (21 DAP) Dual Magnum @ 16 oz/A (21 DAP) Cadre @ 4 oz/A (37 DAP) Dual Magnum @ 16 oz/A (37 DAP) PE16B-11 Sept 2 116 DAP NTC
  15. FL-07, GA Greener = No problems GA-06G and Tifguard = 7-11% yield losses
  16. Peanut Yield Response (lbs/A) to Classic @ 0.5 oz/A (2008-2011) aMeans are averaged over 2 site-years. bDAE = days after peanut emergence. cMeans in the same column with the same letter are not significantly different according to Fisher’s Protected LSD Test (P = 0.10). **When significant, yield losses ranged between 7 to 11%
  17. Georgia Greener Yield Response to Classic (0.5 oz/A): 2011-2012 DAE = Days After Peanut Emergence
  18. A New Formulation of Paraquat from Syngenta
  19. Treatments applied 6 DAC; Photo at 3 DAT GA-02C GI @ 8 oz/A + NIS @ 0.25% v/v GI @ 12 oz/A + Basagran @ 8 oz/A + NIS @ 0.25% v/v
  20. The influence of paraquat on peanut yield (lbs/A)1. 1Weed-free conditions. 2Pooled over four application timings (7, 14, 21, and 28 DAC)
  21. 2012 Peanut Pest Control Rec Changes
  22. Spartan Charge 3.5L FMC Sulfentrazone (Spartan) @ 3.15 lb/gal + carfentrazone (Aim) @ 0.35 lb/gal PRE @ 3-4 oz/A Tank-mix with Prowl or Dual Not on sands with less than 1% OM Rotation Restrictions: canola = 24 months; field corn = 4 months; cotton = 12 months**; small grains = 4 months; sorghum = 10 months; soybeans = anytime; sunflowers = anytime; tobacco = anytime. Same MOA as Valor (PPO) ** some UGA research suggests that the crop rotation restriction for cotton should be 18 months.
  23. Palmer Amaranth Control in Peanut Valor vs. Spartan Charge PE-26-11 August 25 108 DAP NTC Prowl H20 3.8SC @ 32 oz/A (PRE) Valor 51WG @ 3 oz/A (PRE) Cadre 2AS @ 4 oz/A (POST) COC @ 1% v/v (POST) Prowl H20 3.8SC @ 32 oz/A (PRE) Spartan Charge 3.5L @ 4 oz/A (PRE) Cadre 2AS @ 4 oz/A (POST) COC @ 1% v/v (POST)
  24. Sulfentrazone Injury on Peanut High rates, lighter soils
  25. Potential New Herbicides? Valor + Pyroxasulfone Pyroxasulfone Micro-encapsulated acetochlor
  26. Weed Control in Peanut with Warrant Systems PE-21-11 July 19 64 DAP NTC Prowl H20 @ 34 oz/A (2 DAP) Gramoxone Inteon @ 12 oz/A (21 DAP) Storm @ 16 oz/A (21 DAP) Warrant @ 48 oz/A (21 DAP) Cadre @ 4 oz/A (37 DAP) Warrant @ 48 oz/A (37 DAP) Prowl H20 @ 34 oz/A (2 DAP) Gramoxone Inteon @ 12 oz/A (21 DAP) Storm @ 16 oz/A (21 DAP) Dual Magnum @ 16 oz/A (21 DAP) Cadre @ 4 oz/A (37 DAP) Dual Magnum @ 16 oz/A (37 DAP)
  27. Palmer Amaranth Control in Peanut with Fierce PE-24-11 July 29 81 DAP NTC Fierce 76WG @ 3 oz/A (PRE)
  28. Weed Control in Peanut with Pyroxasulfone PE-16B-11 July 19 64 DAP NTC Pyroxasulfone 85WG @ 1.5 oz/A (2 DAP) Strongarm @ 0.23 oz/A (2 DAP) Valor @ 3 oz/A (2 DAP) Cadre @ 4 oz/A (37 DAP) 80/20 @ 0.25% v/v (37 DAP)
  29. New Publication “Peanut Response to Glyphosate” UGA Circular 1007 September 2011 http://www.caes.uga.edu/applications/publications/files/pdf/C%201007_1.PDF
  30. Future Concerns/Issues Abuse of Ignite Increased use of Dual Magnum and Warrant Increased use of PPO herbicides Valor and Reflex
  31. Thanks for Listening! eprostko@uga.edu 229-392-1034 (cell) www.gaweed.com Eric P. Prostko (office) Eric Prostko - laptop