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2024 Peanut Weed Control Update

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

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TABLE OF CONTENTS
  1. 2024 Peanut Weed Control Update
  2. 2023 Problems
  3. Glyphosate/Peanut
  4. Sadly, I have information about peanut response to the following 'non-peanut' herbicides:
  5. Numerical Peanut Yield Loss (%) from 'Non-Peanut' Herbicides Applied at 1/10thX Rates at Different Times in Georgia
  6. Dicamba is NOT labeled for preplant use in peanuts!
  7. Soil-Applied Dicamba Injury on Peanut
  8. What are you buying?
  9. Perennial Weeds in Peanut - I
  10. Perennial Weeds in Peanut - II
  11. Perennial Weeds in Peanut - III
  12. Revenge Spraying Rarely Works!
  13. Gramoxone 3SL + Ultra Blazer 2SL + 2,4-DB 1.75SL + Anthem Flex 4SE + PowerLock
  14. Gramoxone 3SL + Ultra Blazer 2SL + 2,4-DB 1.75SL + Anthem Flex 4SE + PowerLock
  15. Peanut Weed Control - 2023
  16. The Peanut Herbicide Toolbox - 24 Active ingredients
  17. Peanut Tillage Systems
  18. Pre-Plant Burndowns - 2023
  19. Pre-Plant Burndowns - 2023
  20. Peanut Weed Control - 2023 Prowl vs. Sonalan
  21. Peanut Weed Control - 2023 Dual Magnum vs. Anthem Flex
  22. WSSA Group 15 Herbicides?
  23. Tropical Spiderwort/Benghal Dayflower/Spreading Dayflower
  24. Spreading Dayflower in Peanut - 2023
  25. Spreading Dayflower in Peanut - 2023
  26. Spreading Dayflower in Peanut - 2023
  27. Generic Strongarm?
  28. Peanut Weed Control - 2023 Strongarm vs. Diclom
  29. Future Products
  30. Peanut Weed Control - 2023 Valor vs. Brake
  31. Peanut Weed Control - 2023 Valor vs. Rexovor
  32. UGA Current Classic/Cultivar Use Recommendations
  33. I sprayed herbicide X and it did not work therefore I must have resistance?
  34. Annual Grass Control in Peanut
  35. Non-Selective Applicators
  36. WeedWiper vs. TopCrop Wiper
  37. Flail Mower and Peanut - 2021
  38. Flail Mower and Peanut - 2021 Before
  39. Flail Mower and Peanut - 2021 After (2 passes in opposite directions, ~2 MPH)
  40. What do the top Georgia peanut growers do? 2022 Georgia Peanut Achievement Club Winners
  41. Questions/Comments



SLIDE CONTENTS
  1. 2024 Peanut Weed Control Update Eric P. Prostko Extension Weed Specialist Dept. Crop & Soil Sciences
  2. 2023 Problems
  3. Glyphosate/Peanut 6.8 ppm glyphosate detected
  4. Sadly, I have information about peanut response to the following “non-peanut” herbicides: 2,4-D Dicamba Roundup Liberty Diuron Garlon Arsenal Milestone Grazon P+D
  5. Numerical Peanut Yield Loss (%) from “Non-Peanut” Herbicides Applied at 1/10thX Rates at Different Times in Georgia
  6. Dicamba is NOT labeled for preplant use in peanuts!
  7. Soil-Applied Dicamba Injury on Peanut
  8. What are you buying?
  9. Perennial Weeds in Peanut -I maypop passionflower J. Hand, Tift Co. 07/06/23 horsenettle L. Stanley, Montgomery Co. 07/07/23
  10. Perennial Weeds in Peanut - II dogfennel G. Hancock, Turner Co. 06/23 Blue heliotrope 07/17
  11. Perennial Weeds in Peanut - III alligatorweed R. Ethredge, Seminole Co. 07/24/23 goldenrod? M. Frye, Wayne Co. 08/11/23
  12. Revenge Spraying Rarely Works!
  13. Gramoxone 3SL @ 16 oz/A + Ultra Blazer 2SL @ 24 oz/A + 2,4-DB 1.75SL @ 16 oz/A + Anthem Flex 4SE @ 3 oz/A + PowerLock @ 8 oz/A Applied ~60 DAP/Mid-Afternoon application/12 GPA J. Bennett Wilcox Co. 07/10/23 ~3 DAT
  14. Gramoxone 3SL @ 16 oz/A + Ultra Blazer 2SL @ 24 oz/A + 2,4-DB 1.75SL @ 16 oz/A + Anthem Flex 4SE @ 3 oz/A + PowerLock @ 8 oz/A Applied ~60 DAP/Mid-Afternoon application/12 GPA J. Bennett Wilcox Co. 07/18/23 ~11 DAT
  15. Peanut Weed Control - 2023 PE-14-23 July 24 83 DAP “The Program” Weed-free at planting (tillage/cover crops/herbicides) Twin Rows (if possible) Multiple Over-Lapping Residuals (PRE/EPOST/POST) Timely POST’s (3” or less) Prevent Seed-Rain from Escapes (hand-weeding, non-selective applicators/mowing)
  16. The Peanut Herbicide Toolbox 24 Active ingredients PPLNT/PPI/PRE Brake Sonalan Prowl/Pendimax Dual Magnum/Generics Outlook/Propel Pursuit Spartan Charge Solicam Strongarm/Diclom Warrant Valor Roundup (PPLNT) POST Aim (Harvest Aid) Gramoxone Basagran Ultra Blazer Cadre/Impose Classic Cobra Fusilade Poast/Poast Plus Pursuit Select/Arrow/Trigger Storm 2,4-DB Anthem Maxx/Zidua (residual only)
  17. Peanut Tillage Systems June 2022 Strip-Tillage (Worth Co.) Conventional Tillage (Macon Co.)
  18. Pre-Plant Burndowns - 2023 BD-01-23 March 30 21 DAT NTC Roundup PowerMax3 5.88SL @ 22 oz/A 2,4-D 3.8SL @ 16 oz/A Valor EZ 4SC @ 2 oz/A NTC
  19. Pre-Plant Burndowns - 2023 BD-01-23 March 30 21 DAT NTC Gramoxone 2SL @ @ 48 oz/A 2,4-D 3.8SL @ 16 oz/A Valor EZ 4SC @ 2 oz/A Induce @ 0.25% v/v NTC
  20. Peanut Weed Control – 2023 Prowl vs. Sonalan PE-14-23 July 24 83 DAP NTC Prowl H20 3.8SC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A PRE (1 DAP) Cadre 2AS @ 4 oz/A Dual Magnum 7.62EC @ 16 oz/A 2,4-DB 2SL @ 16 oz/A POST (28 DAP) Sonalan 3EC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A PRE (1 DAP) Cadre 2AS @ 4 oz/A Dual Magnum 7.62EC @ 16 oz/A 2,4-DB 2SL @ 16 oz/A POST (28 DAP) 5445 lbs/A 5501 lbs/A
  21. Peanut Weed Control – 2023 Dual Magnum vs. Anthem Flex PE-15-23 July 24 83 DAP NTC Gramoxone 2SL @ 12 oz/A Dual Magnum 7.62EC @ 16 oz/A Storm 4SC @ 16 oz/A Applied 13 DAP Cadre 2AS @ 4 oz/A 2,4-DB 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Induce @ 0.25% v/v Applied 28 DAP Gramoxone 2SL @ 12 oz/A Anthem Flex 4SE @ 3 oz/A Storm 4SC @ 16 oz/A Induce @ 0.25% v/v Applied 13 DAP Cadre 2AS @ 4 oz/A 2,4-DB 2SL @ 16 oz/A Anthem Flex 4SE @ 3 oz/A Induce @ 0.25% v/v Applied 28 DAP
  22. WSSA Group 15 Herbicides?
  23. Tropical Spiderwort/Benghal Dayflower/Spreading Dayflower Plow (i.e. bury seed) Twin Rows Group 15’s (Dual Magnum, Warrant, Outlook, Zidua, Anthem Flex) Paraquat Cadre? Strongarm? Manage after field corn harvest.
  24. Spreading Dayflower in Peanut - 2023 PE-112-23 Berrien Co. June 20 - 18 DAT NTC Gramoxone 2SL @ 12 oz/A Broadloom 4LC @ 8 oz/A Dual Magnum 7.62EC @ 16 oz/A
  25. Spreading Dayflower in Peanut - 2023 PE-112-23 Berrien Co. June 20 - 18 DAT NTC Broadloom 4LC @ 32 oz/A Dual Magnum 7.62EC @ 16 oz/A
  26. Spreading Dayflower in Peanut - 2023 PE-112-23 Berrien Co. June 20 - 18 DAT NTC Strongarm 84WG @ 0.45 oz/A Dual Magnum 7.62EC @ 16 oz/A
  27. Generic Strongarm? Aceto/Actylis Only 1 year of field data? GreenPointAG $620/lb (2023) 0.45 oz/A = $17.43 Strongarm $849/lb? $630/lb?
  28. Peanut Weed Control – 2023 Strongarm vs. Diclom 1st irrigation/rainfall event @ 9 DAP PE-11-23 August 23 114 DAP NTC Sonalan 3EC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A Applied 1 DAP Cadre 2AS @ 4 oz/A 2,4-DB 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Cobra 2EC @ 12.5 oz/A Applied 29 DAP Sonalan 3EC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Diclom 84WG @ 0.225 oz/A Applied 1 DAP Cadre 2AS @ 4 oz/A 2,4-DB 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Cobra 2EC @ 12.5 ozA Applied 29 DAP
  29. Future Products Brake 1.2SL SePRO fluridone WSSA/HRAC Group 12 PRE 2023 Rexovor 4.17SL BASF trifludimoxazin WSSA/HRAC Group14 PRE 2025??
  30. Peanut Weed Control – 2023 Valor vs. Brake PE-13-23 June 26 23 DAP 1st Rainfall/Irrigation event did not occur until 8 DAP NTC Prowl H20 3.8SC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A PRE (1 DAP) Prowl H20 3.8SC @ 32 oz/A Brake 1.2SL @ 12 oz/A Strongarm 84WG @ 0.225 oz/A PRE (1 DAP)
  31. Peanut Weed Control – 2023 Valor vs. Rexovor PE-13-23 June 26 23 DAP 1st Rainfall/Irrigation event did not occur until 8 DAP NTC Prowl H20 3.8SC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A PRE (1 DAP) Prowl H20 3.8SC @ 32 oz/A Rexovor 4.17SC @ 1 oz/A Strongarm 84WG @ 0.225 oz/A PRE (1 DAP)
  32. UGA Current Classic®/Cultivar Use Recommendations NO GA-06G Tifguard GA-12Y 7-13% yield losses YES Florida-07 GA Greener GA-07W GA-09B No problems 60 DAE or 90 DAE or 105 DAE 5% yield loss when applied 75 DAE GA-20VHO GA-18RU AUNPL-17 TIFNV HIGH O/L FLORUN 331 GA-16HO No problems at 60 DAE or 85 DAE. 17% yield loss when applied 75 DAE
  33. I sprayed herbicide X and it did not work therefore I must have resistance? Rate Timing Environment Hot/dry Rain-free period Calibration Coverage Droplet size Nozzle type, pressure Boom height Tractor speed Resistance
  34. Annual Grass Control in Peanut SelectMax 0.97EC @ 24 oz/A + Agridex @ 1% v/v 15 GPA, 3.5 MPH, AIXR11002 nozzles Schley Co. August 2023 07/31/23 0 DAT 08/07/23 7 DAT 08/11/23 11 DAT
  35. Non-Selective Applicators
  36. WeedWiper vs. TopCrop Wiper 50% Solution of Gramoxone Inteon 3.1 MPH, 20” Applicator Height AMAPA = 36-86” tall, 66” avg. NTC WeedWiper TopCrop PIG-07-10 9/21/10 29 DAT
  37. Flail Mower and Peanut - 2021 August 10, 2021 GA-16HO 92 DAP
  38. Flail Mower and Peanut – 2021 Before August 10, 2021 GA-16HO 92 DAP
  39. Flail Mower and Peanut – 2021 After (2 passes in opposite directions, ~2 MPH) August 10, 2021 GA-16HO 92 DAP
  40. What do the top Georgia peanut growers do? 2022 Georgia Peanut Achievement Club Winners 17 growers 101 to 1194 acres (range) 5688 lb/A average yield 4718-6493 lbs/A (range) GA State Avg. = 4250 lb/A 94% - irrigated 59% - bottom plow 76% - twin rows 71% don’t “crack” spray Herbicides 53% - Sonalan 76% - Valor 53% - Dual 65% - Cadre 65% - 2,4-DB 41% - Prowl 35% - Strongarm 12% - Zidua 12% - clethodim 29% - paraquat
  41. Questions/Comments