Slide Presentation

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2018 Peanut Weed Control Update

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

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TABLE OF CONTENTS
  1. 2018 Peanut Weed Control Update
  2. Not a good way to start out!
  3. Peanut Weed Control - 2017 Valor/Cadre Program
  4. Peanut Weed Control - 2017 Valor/Cobra Program
  5. Rainfall Totals - May 20-May 24, 2017
  6. Valor Injury @ (6 oz/A) 16 DAT
  7. Peanut Yield Response to Valor 51WG - 2009
  8. Peanut Yield Response to Valor 51WG - 2013
  9. Peanut Weed Control - 2017 Gramoxone/Cadre Program
  10. Peanut Weed Control - 2017 Gramoxone/Cobra Program
  11. Paraquat Concerns
  12. Gramoxone 2SL @ 12 oz/A + Storm 4SL @ 16 oz/A + Dual Magnum 7.62EC @ 16 oz/A - 14 DAT
  13. A Comparison of Irrigated Weed-Free Peanut Yields Between NTC and Gramoxone 2SL (12 oz/A) + Storm 4SL (16 oz/A) + Dual Magnum 7.62EC (16-21 oz/A) Treatments in Georgia, 2011-2017.
  14. Strongarm
  15. 2017 Strongarm Packaging
  16. 2018 Strongarm Case pack: 12 x 1 lb Pallet configuration: 1-layer, 10 cases per pallet.
  17. Flumioxazin Formulations
  18. Valor SX vs. Red Eagle Flumioxazin
  19. Liquid vs. Dry Flumioxazin
  20. Flumioxazin Formulation Test - 2017 3 oz/A
  21. Peanut Yield
  22. Dual Magnum/High Moisture/Peanuts
  23. Brief History of Metolachlor
  24. Metolachlor/Peanut Research Results
  25. PE-67-17 - June 29 - Irrigation
  26. Destructive Harvest - July 19 (21 DAT)
  27. Results
  28. Valor and Dual Magnum Effects on Peanut J-Rooting - High Moisture Conditions
  29. Valor and Dual Magnum Effects on Peanut Plant Stunting - High Moisture Conditions
  30. Valor and Dual Magnum Effects on Peanut Plant Stunting - High Moisture Conditions
  31. Valor and Dual Magnum Effects on Peanut Plant Stunting - High Moisture Conditions
  32. Valor and Dual Magnum Effects on Peanut Plant Stunting - High Moisture Conditions
  33. New Stuff
  34. Zidua vs. Dual in Peanut - 2017
  35. Brake vs. Valor Programs* - 2017
  36. Brake/Peanut Injury
  37. Avoid The Oopsies!
  38. Oops!
  39. Another Oops!
  40. Glyphosate/Peanut - 2017
  41. Dry MnSO4 + 2,4-DB
  42. What do the top Georgia peanut growers do? 2016 Georgia Peanut Achievement Club Winners
  43. Questions?



SLIDE CONTENTS
  1. 2018 Peanut Weed Control Update Eric P. Prostko Extension Weed Specialist Department of Crop & Soil Sciences
  2. Not a good way to start out!
  3. Peanut Weed Control – 2017 Valor/Cadre Program PE-19-17 July 31 84 DAP NTC Prowl H20 3.8CS @ 32 oz/A (PRE) Valor SX 51WG @ 3 oz/A (PRE) Strongarm 84WG @ 0.225 oz/A (PRE) Cadre 2AS @ 4 oz/A (38 DAP) 2,4-DB 1.75SL @ 18 oz/A (38 DAP) Dual Magnum 7.62EC @ 16 oz/A (38 DAP)
  4. Peanut Weed Control – 2017 Valor/Cobra Program PE-19-17 July 31 84 DAP NTC Prowl H20 3.8CS @ 32 oz/A (PRE) Valor SX 51WG @ 3 oz/A (PRE) Strongarm 84WG @ 0.225 oz/A (PRE) Cobra 2EC @ 12.5 oz/A (38 DAP) 2,4-DB 1.75SL @ 18 oz/A (38 DAP) Dual Magnum 7.62EC @ 16 oz/A (38 DAP)
  5. Rainfall Totals - May 20-May 24, 2017 Source: UGA Automated Weather Network
  6. Valor Injury @ (6 oz/A) 16 DAT PE-08-09 May 22, 2009 PD: May 5 Rainfall Events: May 5 = 0.04” May 14 = 0.56” May 15 = 0.16” May 16 = 0.01” May 17 = 0.51” May 20 = 0.07” May 21 = 0.59” May 22 = 0.58” May 23 = 0.24” May 24 = 0.13” May 25 = 0.20” May 26 = 0.89” May 28 = 0.05” June 3 = 0.08” June 4 = 0.56” June 5 = 0.77” 30 day rainfall total from planting = 5.44”
  7. Peanut Yield Response to Valor 51WG - 2009 PE-08-09 Averaged over 3 varieties (GA Green, GA-06G, GA-07W) and 6 replications Weed-free LSD 0.10 = 185
  8. Peanut Yield Response to Valor 51WG - 2013 PE-14-13 GA-06G Averaged over 3 planting dates (April 16, April 29, May 13) Weed-free P=0.4015
  9. Peanut Weed Control – 2017 Gramoxone/Cadre Program PE-10-17 August 16 106 DAP NTC Prowl H20 3.8SC @ 32 oz/A (PRE) Gramoxone 2SL @ 12 oz/A (15 DAP) Storm 4SL @ 16 oz/A (15 DAP) Dual Magnum 7.62EC @ 4 oz/A (15 DAP) Cadre 2AS @ 4 oz/A (42 DAP) 2,4-DB 1.75SL @ 18 oz/A (42 DAP) Dual Magnum 7.62EC @ 16 oz/A (42 DAP)
  10. Peanut Weed Control – 2017 Gramoxone/Cobra Program PE-10-17 August 16 106 DAP Prowl H20 3.8SC @ 32 oz/A (PRE) Gramoxone 2SL @ 12 oz/A (15 DAP) Storm 4SL @ 16 oz/A (15 DAP) Dual Magnum 7.62EC @ 4 oz/A (15 DAP) Cobra 2EC @ 12.5 oz/A (42 DAP) 2,4-DB 1.75SL @ 18 oz/A (42 DAP) Dual Magnum 7.62EC @ 16 oz/A (42 DAP) NTC
  11. Paraquat Concerns Using higher paraquat rates without a safener and/or later in the peanut life cycle puts you at more risk for potential yield loss, especially in high yielding irrigated fields or dryland fields! 3 DAT
  12. Gramoxone 2SL @ 12 oz/A + Storm 4SL @ 16 oz/A + Dual Magnum 7.62EC @ 16 oz/A – 14 DAT PE-18-17 May 30 15 GPA 3.5 MPH 11002DG nozzles
  13. A Comparison of Irrigated Weed-Free Peanut Yields Between NTC and Gramoxone 2SL (12 oz/A) + Storm 4SL (16 oz/A) + Dual Magnum 7.62EC (16-21 oz/A) Treatments in Georgia, 2011-2017. NTC (lbs/A) G + S + DM (lbs/A) PEA01-11 (GA-06G) PEA01-12 (GA-06G) PE-20-11 (GA-06G) PE-01-12 (GA-06G) PE-17-12 (GA-06G) PE-02-13 (GA-06G) PE-02B-13 (GA-09B) PE-12-13 (GA-06G) PE-13-13 (GA-06G) PE-06-14 (GA-06G) PE-06-14 (GA-09B) PE-08-14 (GA-12Y) PE-15-15 (GA-12Y) PE-16-15 (GA-13M) PE-06-16 (GA-12Y) PE-20-16 (GA-06G) PE-21-17 (GA-16HO) n = 82 IF X = 5000 THEN Y = 4984 (99.7%) IF X = 6000 THEN Y = 5778 (96.3%) IF X = 6500 THEN Y = 6176 (95%)
  15. 2017 Strongarm Packaging DOW RESTRICTED 1 case = 40 acres
  16. 2018 Strongarm Case pack: 12 x 1 lb Pallet configuration: 1-layer, 10 cases per pallet. 12 x 1 lb case pack using natural bottles (35.6 acres/bottle) (426.7 acres/case) (4267 acres/pallet) DOW RESTRICTED
  17. Flumioxazin Formulations
  18. Valor SX vs. Red Eagle Flumioxazin Valor Red Eagle Flumioxazin
  19. Liquid vs. Dry Flumioxazin
  20. Flumioxazin Formulation Test – 2017 3 oz/A PE-20A-17 June 28 65 DAP *All treatments included Prowl H2O (PRE) fb Cadre + Dual Magnum + 2,4-DB (32 DAP)
  21. Peanut Yield P = 0.5966
  22. Dual Magnum/High Moisture/Peanuts Applied PRE under high moisture conditions Questions? Crop injury J-rooting Yield loss
  23. Brief History of Metolachlor Metolachlor synthesized by Ciba-Geigy in 1972 50/50% mixture of R + S isomers Registered for corn in 1977 Dual 8E Registered for peanut in 1980 (February) Ciba + Sandoz = Novartis (1996) S-metolachlor registered for use in 1997 (Novartis) 12/88% mix of R + S isomers Patent expiration EPA Reduced Risk Pesticide Program Dual Magnum 7.62EC (+ safener) Novartis stopped selling “old” metolachlor in 1999, phased out completely by 2001. Novartis + AstraZeneca became Syngenta in 2000 Generic companies started producing “old” metolachlor in 2003 (i.e. 50/50 mix of R + S isomer).
  24. Metolachlor/Peanut Research Results
  25. PE-67-17 – June 29 - Irrigation Planted: June 28 Rainfall/Irrigation: June 28-July 5 = 4.29” July 6-12 = 0.375” July 13-19 = 1.75” July 20-31 = 2.25”
  26. Destructive Harvest – July 19 (21 DAT)
  27. Results PRE applied Dual Magnum under high moisture conditions (~8.4” rainfall/irrigation within 30 DAP) had no effect on peanut emergence, population, or J-rooting increased peanut stunting 21 oz/A = +9-16% 42 oz/A = +22-25% Yield?
  28. Valor and Dual Magnum Effects on Peanut J-Rooting - High Moisture Conditions PE-67-17 21 DAT No interactions P = 0.1215 P = 0.2832 *averaged over 3 Dual Magnum rates **averaged over 3 Valor rates
  29. Valor and Dual Magnum Effects on Peanut Plant Stunting - High Moisture Conditions PE-67-17 July 17 19 DAT Valor SX 51 WG @ 3 oz/A Dual Magnum 7.62EC @ 21 oz/A Valor SX 51WG @ 3 oz/A Dual Magnum 7.62EC @ 42 oz/A Valor SX 51WG @ 3 oz/A
  30. Valor and Dual Magnum Effects on Peanut Plant Stunting - High Moisture Conditions PE-67-17 August 15 48 DAT Valor SX 51 WG @ 3 oz/A Dual Magnum 7.62EC @ 21 oz/A Valor SX 51WG @ 3 oz/A Dual Magnum 7.62EC @ 42 oz/A Valor SX 51WG @ 3 oz/A
  31. Valor and Dual Magnum Effects on Peanut Plant Stunting - High Moisture Conditions PE-67-17 September 13 77 DAT Valor SX 51 WG @ 3 oz/A Dual Magnum 7.62EC @ 21 oz/A Valor SX 51WG @ 3 oz/A Dual Magnum 7.62EC @ 42 oz/A Valor SX 51WG @ 3 oz/A
  32. Valor and Dual Magnum Effects on Peanut Plant Stunting - High Moisture Conditions PE-67-17 October 24 118 DAT Valor SX 51 WG @ 3 oz/A Dual Magnum 7.62EC @ 21 oz/A Valor SX 51WG @ 3 oz/A Dual Magnum 7.62EC @ 42 oz/A Valor SX 51WG @ 3 oz/A
  33. New Stuff Zidua (pyroxasulfone) gets a peanut label in 2017. Brake (fluridone) in the pipeline. Nothing after that???
  34. Zidua vs. Dual in Peanut - 2017 PE-10-17 August 16 106 DAP NTC Prowl H2O @ 32 oz/A – PRE Gramoxone 2SL @ 12 oz/A – 154 DAP Storm SL @ 16 oz/A – 15 DAP Zidua 85WG @ 2.0 oz/A – 15 DAP NIS @ 0.25% v/v – 15 DAP Cadre 2AS @ 4 oz/A – 36 DAP 2,4-DB 1.75SL @ 18 oz/A – 36 DAP Zidua 85WG @ 2.0 oz/A – 36 DAP COC @ 1% v/v – 36 DAP Prowl H2O @ 32 oz/A – PRE Gramoxone 2SL @ 12 oz/A – 15 DAP Storm SL @ 16 oz/A – 15 DAP Dual Magnum 7.62EC @ 16 oz/A – 15 DAP Cadre 2AS @ 4 oz/A – 36 DAP 2,4-DB 1.75SL @ 18 oz/A – 36 DAP Dual Magnum 7.62EC @ 16 oz/A – 36 DAP
  35. Brake vs. Valor Programs* - 2017 PE-07-17 July 28 94 DAP Valor Program Brake Program NTC Valor Program Brake Program Valor Program Brake Program *Both programs also included Prowl H2O (PRE) and Cadre + Dual Magnum + 2,4-DB (36 DAP) NTC
  36. Brake/Peanut Injury PE-07-17 May 15 20 DAP
  37. Avoid The Oopsies!
  38. Oops! Applied 60 DAP 15 GPA 11am Valor 2 oz Cadre 2 oz 2,4-DB 16 oz Bravo 16 oz Pic @ 10 dat
  39. Another Oops! September 14, 2017 32 DAT (122 DAP) Tide Hexar 2SL 14.5 oz/A + COC Treated Not treated
  40. Glyphosate/Peanut - 2017 Bulloch County Early County
  41. Dry MnSO4 + 2,4-DB Day 1- Mixed in 700-800 Gallons of water – no problems Day 2 - Mixed in less than 100 gallons of water – Big Mess Dr. Alan York NCSU July 2017
  42. What do the top Georgia peanut growers do? 2016 Georgia Peanut Achievement Club Winners 14 growers 6266 lb/A average yield GA State Avg. = 3900 lb/A 14/14 – irrigated (100%) 10/14 - bottom plow (71%) 11/13 - twin rows (85%) Herbicides 8/14 – Sonalan (57%) 12/14 - Valor (86%) 3/14 - Dual (21%) 12/14 - Cadre (86%) 9/14 - 2,4-DB (64%) 4/14 – Prowl (29%) 5/14 – Strongarm (36%)
  43. Questions? eprostko@uga.edu www.gaweed.com