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TABLE OF CONTENTS
  1. Peanut Weed Control Update - 2019
  2. Georgia Rainfall Totals (inches) April 1 - September 1
  3. Is this glyphosate?
  4. Which treatment do you prefer?
  5. Peanut Weed Control Integrated Program Approach
  6. The Peanut Herbicide Toolbox- 23 Active ingredients
  7. Peanut Weed Control - 2018 Valor/Cadre Program
  8. Peanut Weed Control - 2018 Gramoxone/Cadre Program
  9. What do the top Georgia peanut growers do? 2017 Georgia Peanut Achievement Club Winners
  10. Weed Wiper Randolph County - August 20, 2018
  11. Other Topics of Interest
  12. Anthem Flex in Peanut
  13. Weed Control in Peanut with Anthem Flex - 2018
  14. Gramoxone + Storm + Anthem Flex
  15. Anthem Flex Injury from POST Applications
  16. Brake (fluridone) vs. Valor - 2018
  17. Flumioxazin Formulations
  18. Flumioxazin Formulation Test - 2017 3 oz/A
  19. Valor Formulation Test - 2018 (3 oz/A + Prowl H20 @ 32 oz/A)
  20. Brief History of Metolachlor
  21. Early Metolachlor/Peanut Research Results
  22. Valor/Dual High Moisture Test - 2018
  23. Peanut Response to Valor + Dual Magnum - 2018
  24. J-Rooting
  25. Valor/Dual Magnum High Moisture Results - 2018
  26. VMD for common nozzle types
  27. Objective:
  28. Methodology
  29. Bulloch County Nozzle Test - 2018
  30. Miller County Nozzle - 2018
  31. Pierce County Nozzle Test - 2018
  32. 2018 Nozzle Tests Pesticides/Fertilizers Applied
  33. Yield Data
  34. Pierce County Nozzle Test September 19, 2018
  35. Pierce County Nozzle Test September 19, 2018
  36. Nozzle Tests - Summary
  37. Nozzle Tests Thoughts
  38. Off-Target Dicamba/Peanuts
  39. Dicamba/Peanuts - I (Epinasty)
  40. Dicamba/Peanuts - II (leaf strapping)
  41. Dicamba/Peanuts - III (leaf roll)
  42. Peanut Response to Xtendimax + Glyphosate (1/50th X) - 2018 Applied 30 + 60 + 90 DAP
  43. Peanut yield (lbs/A) as influenced by dicamba + glyphosate applied at 1/50th X rates.
  44. Peanuts/Dicamba Summary
  45. Pay Attention to Detail!
  46. Tropical Spiderwort (a.k.a. Benghal Dayflower) Control in Peanut
  47. Questions/Comments



SLIDE CONTENTS
  1. Peanut Weed Control Update - 2019 Eric P. Prostko, Ph.D. Professor and Extension Weed Specialist Department of Crop & Soil Sciences
  2. Georgia Rainfall Totals (inches) April 1 – September 1 Source: UGA Weather Network
  3. Is this glyphosate? 5900+ lbs/A
  4. Which treatment do you prefer? PE-13-18 LSD (P= 0.10) = 481 THSD (P = 0.10) = 974
  5. Peanut Weed Control Integrated Program Approach Tillage Rye Cover Crop Twin Rows Herbicides Hand-Weeding Irrigation
  6. The Peanut Herbicide Toolbox 23 Active ingredients PPI/PRE Sonalan Prowl/Pendimax Dual Magnum/Generics Outlook/Propel Pursuit Spartan Charge Solicam Strongarm Valor Zidua POST Aim (Harvest Aid) Gramoxone Inteon/Firestorm/Parazone Basagran Ultra Blazer Cadre/Impose Classic Cobra ET (harvest aid) Fusilade Poast/Poast Plus Pursuit Select/Arrow/Trigger Storm 2,4-DB
  7. Peanut Weed Control – 2018 Valor/Cadre Program PE-15-18 July 17 71 DAP NTC Prowl H20 3.8Sc @ 32 oz/A (PRE) Valor SX 51WG @ 3.0 oz/A (PRE) Strongarm 84WG @ 0.45 oz/A (PRE) Cadre 2AS @ 4 oz/A (38 DAP) Dual Magnum 7.62EC @ 16 oz/A (38 DAP)
  8. Peanut Weed Control – 2018 Gramoxone/Cadre Program PE-15-18 July 17 71 DAP NTC
  9. What do the top Georgia peanut growers do? 2017 Georgia Peanut Achievement Club Winners 15 growers 6249 lb/A average yield GA State Avg. = 4380 lb/A 100% - irrigated 67% - bottom plow 86% - twin rows Herbicides 53% - Sonalan 93% - Valor 20%- Dual 73% - Cadre 53% - 2,4-DB 47% - Prowl 40% - Strongarm 9.1 MPH and 12.2 GPA (avg.)
  10. Weed Wiper Randolph County – August 20, 2018 Treated 8/8/18
  11. Other Topics of Interest Future Anthem Flex (pyroxasulfone + carfentrazone) Brake (fluridone) Valor Formulations Valor/Dual Magnum Combos in High Moisture Auxin Nozzles Dicamba Tropical spiderwort /Benghal Dayflower
  12. Anthem Flex in Peanut FMC Anthem Flex 4SE carfentrazone (0.267 lb/gal) pyroxasulfone (3.733 lbs/gal) Testing since 2012 POST only! Increase in crop injury mostly due to carfentrazone 3 oz/A + NIS 0.0063 lb ai/A – carfentrazone Aim 2EC @ 0.4 oz/A 0.0875 lbs ai/A – pyroxasulfone Zidua 85WG @ 1.65 oz/A
  13. Weed Control in Peanut with Anthem Flex - 2018 PE-15-18 July 17 71 DAP NTC Prowl H20 @ 32 oz/A – PRE Gramoxone @ 12 oz/A - 16 DAP Storm @ 16 oz/A - 16 DAP Dual Magnum @ 16 oz/A -16 DAP Cadre @ 4 oz/A - 38 DAP Dual Magnum @ 16 oz/A - 38 DAP Prowl H20 @ 32 oz/A – PRE Gramoxone @ 12 oz/A - 16 DAP Storm @ 16 oz/A - 16 DAP Anthem Flex @ 3 oz/A -16 DAP Induce @ 0.25% v/v Cadre @ 4 oz/A - 38 DAP Anthem Flex @ 3 oz/A - 38 DAP Induce @ 0.25% v/v
  14. Gramoxone + Storm + Anthem Flex PE-02-15 May 19 1 DAT
  15. Anthem Flex Injury from POST Applications PE-12B-14 June 19
  16. Brake (fluridone) vs. Valor - 2018 PE-12-18 July 17 5 weeks after POST NTC Prowl H20 @ 32 oz/A (PRE) Valor SX @ 3 oz/A (PRE) Cadre @ 4 oz/A (POST) Dual Magnum @ 16 oz/A (POST) 2,4-DB @ 16 oz/A (POST) Prowl H20 @ 32 oz/A (PRE) Brake 1.2L @ 16 oz/A (PRE) Cadre @ 4 oz/A (POST) Dual Magnum @ 16 oz/A (POST) 2,4-DB @ 16 oz/A (POST)
  17. Flumioxazin Formulations
  18. 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)
  19. Valor Formulation Test - 2018 (3 oz/A + Prowl H20 @ 32 oz/A) PE-06-18 June 18 42 DAP 13.55” (R + I) Valor SX Red Eagle Panther SC Valor EZ NTC
  20. Brief History of Metolachlor Synthesized by Ciba-Geigy in 1972 50/50% mixture of R + S isomers Registered for corn in 1977 Registered for peanut in 1980 (February) S-metolachlor registered for use in 1997 (Novartis) 12/88% mix of R + S isomers Patent expiration EPA Reduced Risk Pesticide Program 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).
  21. Early Metolachlor/Peanut Research Results What about high moisture conditions and tank-mixes with Valor?
  22. Valor/Dual High Moisture Test - 2018 11.315 OF TOTAL IRRIGATION/RAINFALL IN FIRST 30 DAYS AFTER APPLICATION
  23. Peanut Response to Valor + Dual Magnum - 2018 PE-09-18 July 24 83 DAT 11.315 OF TOTAL IRRIGATION/RAINFALL IN FIRST 30 DAYS AFTER APPLICATION NTC Valor @ 3 oz/A + Dual Magnum @ 16 oz/A PRE
  24. J-Rooting PE-09-18 May 21 21 DAP
  25. Valor/Dual Magnum High Moisture Results - 2018 No interactions between Valor and Dual Magnum No effect on J-rooting Valor and Dual reduced early season peanut biomass (stunting) Valor @ 3 or 6 oz/A had no effect on yield Dual Magnum reduced peanut yields under these high moisture conditions. 16 oz/A = 4.2% loss 21 oz/A = 5.4% loss 42 oz/A = 10.8% loss
  26. 11002DG VMD50 = 322 (M) AIXR 11002 VMD50 = 402 (C) TTI 02 VMD50 = 524 (XC) VMD for common nozzle types
  27. Objective: Compare the field performance of auxin nozzles to flat fan nozzles in commercial peanut fields.
  28. Methodology 3 commercial peanut fields Plot size Sprayer width X field length 3-4 replications 2 nozzle types All agri-chemicals ANOVA Tukey’s HSD (P=0.10)
  29. Bulloch County Nozzle Test - 2018 03/23/2017 JD 4630 15 GPA 25 PSI 12.6 MPH 90’ boom length 15” nozzle spacing 32”-34” boom height
  30. Miller County Nozzle - 2018 JD4030 110 ft boom 20” nozzle 10 MPH 25 PSI 10 GPA
  31. Pierce County Nozzle Test - 2018
  32. 2018 Nozzle Tests Pesticides/Fertilizers Applied
  33. Yield Data Miller Co. October 3 6 rows (18’) X 1000’ (0.413 acres/rep) – Bulloch/Miller 6 rows (18’) X Field Length (0.680-0.735 acres/rep) - Pierce
  34. Pierce County Nozzle Test September 19, 2018 XR11006-VP
  35. Pierce County Nozzle Test September 19, 2018 TTI-11006VP-C
  36. Nozzle Tests - Summary No differences in weed, insect, disease control observed except for 3-CAH in Miller Co. No differences in peanut yield Growers liked auxin nozzles and plan to expand use in 2019 Pierce Co. October 31
  37. Nozzle Tests Thoughts TTI60 will likely not be registered for dicamba Growers who historically have less than ideal pest control should not take a chance on coverage Timing is important!
  38. Off-Target Dicamba/Peanuts
  39. Dicamba/Peanuts – I (Epinasty)
  40. Dicamba/Peanuts – II (leaf strapping)
  41. Dicamba/Peanuts – III (leaf roll)
  42. Peanut Response to Xtendimax + Glyphosate (1/50th X) - 2018 Applied 30 + 60 + 90 DAP PE-03-18 August 16 108 DAP
  43. Peanut yield (lbs/A) as influenced by dicamba + glyphosate applied at 1/50th X rates. THSD (P=0.10) = NS CV = 4.8 Time (DAP)
  44. Peanuts/Dicamba Summary No tolerance is currently established Peanut injury dependent upon rate and time of event Drift rates or volatility rates (1/50thX and lower) will cause symptomology but should not reduce yields Pay attention!
  45. Pay Attention to Detail!
  46. Tropical Spiderwort (a.k.a. Benghal Dayflower) Control in Peanut Tillage (moldboard plow) Twin Rows (+8%) 2 applications of Dual Magnum PRE or EPOST or POST? Gramoxone, Cadre, Strongarm, Basagran – POST
  47. Questions/Comments