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

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TABLE OF CONTENTS
  1. Peanut Weed Control Update - 2016
  2. Peanut Weed Control General Thoughts
  3. Herbicide Sensitive Peanut Growth Stages
  4. Current Peanut Weed Science Research at UGA
  5. Flumioxazin
  6. Peanut Weed Control - 2015 (Valor-Based Programs)
  7. Peanut Weed Control - 2015 (Paraquat-Based Programs)
  8. Cadre, Cobra, 2,4-DB, Dual Magnum, and Warrant Effects on Peanut Yield - III
  9. Sicklepod Control in 2015
  10. This is what 3" tall sicklepod looks like!
  11. AZ1(L) and DC4(R) Response to Cadre @ 4 oz/A + COC @ 1% v/v - 21DAT
  12. New Peanut Variety Yield Response to POST Herbicides - 2015
  13. 11002DG, AIXR 11002, TTI 02
  14. Nozzle Type Effects on Peanut Weed Control - I
  15. Nozzle Type Effects on Peanut Weed Control - II
  16. Nozzle Type Effects on Peanut Weed Control - III
  17. Nozzle Type Effects on Peanut Weed Control - IV
  18. Time of Day Research
  19. Time of Day Effects on Gramoxone (12 oz/A) + Storm (16 oz/A) + Dual Magnum (16 oz/A)
  20. Time of Day Effects on Gramoxone (12 oz/A) + Storm (16 oz/A) + Dual Magnum (16 oz/A)
  21. Time of Day Effects of Gramoxone + Storm + Dual Magnum on Palmer Amaranth Control (14-15 DAT) - 2015
  22. Pay Attention!!!!! 2,4-DB and 2,4-D are not the same thing!!!!
  23. How much 2,4-DB? (as of June 29, 2015)
  24. 2,4-DB and Peanut Tolerance
  25. 2,4-DB Effects on Peanut Yield (GA-06G) - 2015
  26. 2,4-DB Effects on Peanut Pod Size (GA-06G) - 2015
  27. Grazon P+D 2.54SL 1/10X rate (2.4 oz/A) - Applied 63 DAP
  28. Grazon P+D 2.54SL Effects on Peanut Yield (lb/A)
  29. What do the top Georgia peanut growers do? 2014 Georgia Peanut Achievement Club Winners
  30. Questions?



SLIDE CONTENTS
  1. Peanut Weed Control Update - 2016 Eric P. Prostko, Ph.D. Professor and Extension Weed Specialist Department of Crop & Soil Sciences
  2. Peanut Weed Control General Thoughts Done by 40-45 DAP Do you really need Gramoxone in Valor treated fields under irrigation? Warrant or Dual + Valor at planting for pigweed? Herbicide resistance or Farmer resistance? Too big too dry - too fast too high
  3. Herbicide Sensitive Peanut Growth Stages R5 R6
  4. Current Peanut Weed Science Research at UGA Variety Tolerance New Herbicides Pyroxasulfone Zidua, Anthem Flex Fluridone Brake Nozzle Types Time of Day Fine Tuning Existing Programs Tank-Mixtures
  5. Flumioxazin
  6. Peanut Weed Control 2015 (Valor-Based Programs) PE-13-15 August 12 100 DAP NTC Prowl H20 @ 32 oz/A (PRE) Valor @ 3.0 oz/A (PRE) Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A 36 DAP Dual Magnum @ 16 oz/A 36 DAP 2,4-DB @ 18 oz/A 36 DAP Prowl H20 @ 32 oz/A (PRE) Valor @ 3.0 oz/A (PRE) Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A 36 DAP Warrant @ 48 oz/A 36 DAP 2,4-DB @ 18 oz/A 36 DAP
  7. Peanut Weed Control 2015 (Paraquat-Based Programs) PE-13-15 August 12 100 DAP NTC Prowl H20 @ 32 oz/A PRE Gramoxone @ 12 oz/A 17 DAP Storm @ 16 oz/A 17 DAP Dual Magnum @ 16 oz/A 17 DAP Cadre @ 4 oz/A 36 DAP Dual Magnum @ 16 oz/A 36 DAP 2,4-DB @ 18 oz/A 36 DAP Prowl H20 @ 32 oz/A PRE Gramoxone @ 12 oz/A 17 DAP Storm @ 16 oz/A 17 DAP Warrant @ 48 oz/A 17 DAP NIS @ 0.25% v/v 17 DAP Cadre @ 4 oz/A 36 DAP Warrant @ 48 oz/A 36 DAP 2,4-DB @ 18 oz/A 36 DAP NIS @ 0.25% v/v 36 DAP
  8. Cadre (CD), Cobra (CB), 2,4-DB, Dual Magnum (DM), and Warrant (W) Effects on Peanut Yield - III PE-14-15 Averaged over 2 timings (31 and 45 DAP) Weed-free P = 0.4691
  9. Sicklepod Control in 2015 + Cadre - Cadre PE-13-15 August 12 100 DAP
  10. This is what a 3 tall sicklepod looks like!
  11. AZ1(L) and DC4(R) Response to Cadre @ 4 oz/A + COC @ 1% v/v 21DAT
  12. New Peanut Variety Yield Response to POST Herbicides - 2015 PE-15-15 PE-16-15 Weed-free
  13. 11002DG VMD50 = 322 (C) AIXR 11002 VMD50 = 402 (VC) TTI 02 VMD50 = 524 (EC)
  14. Nozzle Type Effects on Peanut Weed Control - I PE-05A-15 July 29 90 DAP NTC 11002DG 11002 AIXR TTI 02 Prowl H2O @ 32 oz/A (PRE) Gramoxone @ 12 oz/A + Storm @ 16 oz/A + Dual Magnum @ 16 oz/A (15 DAP) Cadre @ 4 oz/A + Dual Magnum @ 16 oz/A + 2,4-DB @ 16 oz/A (42 DAP) 15 GPA 3.0 MPH 20 Boom Height
  15. Nozzle Type Effects on Peanut Weed Control - II PE-05B-15 August 3 91 DAP Prowl H2O @ 32 oz/A (PRE) Gramoxone @ 12 oz/A + Storm @ 16 oz/A + Dual Magnum @ 16 oz/A (23 DAP) Cadre @ 4 oz/A + Dual Magnum @ 16 oz/A + 2,4-DB @ 16 oz/A (36 DAP) 15 GPA 3.0 MPH 20 Boom Height 11002 AIXR
  16. Nozzle Type Effects on Peanut Weed Control - III PE-05A-15 July 29 90 DAP NTC 11002DG Prowl H2O @ 32 oz/A (PRE) Gramoxone @ 12 oz/A + Storm @ 16 oz/A + Dual Magnum @ 16 oz/A (15 DAP) Cobra @ 12.5 oz/A + Dual Magnum @ 16 oz/A + 2,4-DB @ 16 oz/A (42 DAP) 15 GPA 3.0 MPH 20 Boom Height
  17. Nozzle Type Effects on Peanut Weed Control - IV PE-05B-15 August 3 91 DAP Prowl H2O @ 32 oz/A (PRE) Gramoxone @ 12 oz/A + Storm @ 16 oz/A + Dual Magnum @ 16 oz/A (23 DAP) Cobra @ 12.5 oz/A + Dual Magnum @ 16 oz/A + 2,4-DB @ 16 oz/A (36 DAP) 15 GPA 3.0 MPH 20 Boom Height
  18. Time of Day Research Afternoon showers are a problem Hard to see No real benefit Nyctinasty Leaves close at night sicklepod
  19. Time of Day Effects on Gramoxone (12 oz/A) + Storm (16 oz/A) + Dual Magnum (16 oz/A) PE-04B-14 June 5 15 DAT 7 am 12 pm 5 pm
  20. Time of Day Effects on Gramoxone (12 oz/A) + Storm (16 oz/A) + Dual Magnum (16 oz/A) PE-04B-14 June 5 15 DAT NTC 10 PM
  21. Time of Day Effects of Gramoxone + Storm + Dual Magnum on Palmer Amaranth Control (14-15 DAT) 2015 * Not significantly different at any location 15 GPA 11002DG 38-40 PSI 3.5 MPH
  22. Pay Attention!!!!! 2,4-DB and 2,4-D are not the same thing!!!!
  23. How much 2,4-DB? (as of June 29, 2015) aWAP = weeks after planting; bDAP = days after planting
  24. 2,4-DB and Peanut Tolerance 2015 GA-06G Weed-free 24 oz/A of 2,4-DB 1.75SL + COC @ 1% v/v, applied throughout the season, had no effect on peanut yield or pod size
  25. 2,4-DB Effects on Peanut Yield (GA-06G) 2015 PE-06-15 2,4-DB 1.75 SL 24 oz/A 1% COC Weed-free P = 0.7391 CV = 8.49
  26. 2,4-DB Effects on Peanut Pod Size (GA-06G) 2015 PE-06-15 2,4-DB 1.75 SL 24 oz/A 1% COC Weed-free P = 0.3120 CV = 8.23
  27. Grazon P+D 2.54SL 1/10X rate (2.4 oz/A) Applied 63 DAP PE-11-15 August 11 112 DAP
  28. Grazon P+D 2.54SL Effects on Peanut Yield (lb/A) P = 0.4355 PE-11-15
  29. What do the top Georgia peanut growers do? 2014 Georgia Peanut Achievement Club Winners 10 growers 6312 lb/A average yield GA State Avg. = 4135 lb/A 10/10 - irrigated 8/10 - bottom plow 10/10 - twin rows Rotations peanuts every 3rd or 4th year Herbicides 8/10 - Sonalan 9/10 - Valor 3/10 - Dual 8/10 - Cadre 6/10 - 2,4-DB 2/10 - Prowl 3/10 - Strongarm
  30. Questions? eprostko@uga.edu www.gaweed.com