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

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TABLE OF CONTENTS
  1. 2025 Peanut Weed Control Update
  2. 2024 Problems
  3. 2,4-D LV4 @ 16 oz/A Applied at 45 DAP
  4. 2,4-D (not 2,4-DB) on Peanut
  5. Gramoxone 3SL @ ~8-16 oz/A (70-80 DAP)
  6. Atrazine 4L @ 12 oz/A ~90 DAP
  7. Roundup Drift on Peanut From Drone (3 qt/A + COC @ 3 GPA)
  8. Roundup/Peanut
  9. Gunslinger AMP (aminopyralid + 2,4-D) Sprayer Contamination (24 oz/A applied to pasture then rinsed out)
  10. Gunslinger AMP (aminopyralid + 2,4-D) Sprayer Contamination (24 oz/A applied to pasture then rinsed out)
  11. Numerical Peanut Yield Loss (%) from "Non-Peanut" Herbicides Applied at 1/10X Rates at Different Times in Georgia
  12. Gunslinger AMP Sprayer Cleanout
  13. Cadre "Yellow Flash" - 3 DAT
  14. Yellow Nutsedge Control with Cadre @ 4 oz/A + Agridex @ 1% v/v - 2019
  15. Cadre Not Working on Yellow Nutsedge Anymore?
  16. Cadre (imazapic) Resistant Yellow Nutsedge - 28 DAT
  17. Yellow Nutsedge/Cadre Samples-2024
  18. Yellow Nutsedge Control with Broadloom (bentazon) - 2019
  19. Yellow Nutsedge Control with Split Shot of Basagran (32 oz/A) + Crop Oil (1% v/v) - Field was previously treated with Cadre @ ~40 DAP.
  20. Dicamba Preplant? NO, NO, NO!!!!
  21. Dicamba Preplant in Peanut (Not Labeled, need at least 28 D + 1" rainfall/irrigation)
  22. Do What?
  23. Peanut/pH/Zinc
  24. Peanut/pH/Zn
  25. Peanut Weed Control Programs
  26. Herbicide Use in Georgia Peanuts (2018 and 2023)
  27. Peanut Weed Control - 2024
  28. Peanut Weed Control - 2024
  29. WSSA Group 15 Herbicides?
  30. Storm vs. "Georgia" Storm - 2024
  31. Peanut Weed Control - 2024
  32. Valor Injury - 2019
  33. Valor Effects on Peanut Yield High Moisture Conditions - 2019
  34. Valor causes injury but what about weed control?
  35. Peanut Yield as Influenced By Valor 50WG (3 oz/A) Timing
  36. New Stuff
  37. Generic Strongarm?
  38. Peanut Weed Control - 2024
  39. Brake Injury - 2024 (Grower Field)
  40. Brake Label Issues
  41. 2024 Brake/Rexovor Timing Study
  42. Brake/Rexovor Timing - 2024
  43. Peanut (GA-06G) Yield Response to Brake Timing (2022-2024)
  44. Pendimethalin Formulations
  45. Weed Control in Peanut with Different Pendimethalin Formulations - 2024
  46. Enversa™
  47. Weed Control in Peanut - 2024 - Warrant 3ME & Enversa 3ME
  48. Weed Control in Peanut - 2024
  49. What do the top Georgia peanut growers do? 2023 Georgia Peanut Achievement Club Winners
  50. Questions/Comments



SLIDE CONTENTS
  1. 2025 Peanut Weed Control Update Eric P. Prostko Extension Weed Specialist Dept. Crop & Soil Sciences
  2. 2024 Problems
  3. 2,4-D LV4 @ 16 oz/A Applied at 45 DAP Cadre 2,4-DB Class Act NG Cadre 2,4-D LV4 Class Act NG 13% yield loss??
  4. 2,4-D (not 2,4-DB) on Peanut
  5. Gramoxone 3SL @ ~8-16 oz/A (70-80 DAP) No Negative Yield Effects
  6. Atrazine 4L @ 12 oz/A ~90 DAP ~ 4500 NTC ~2500 treated 44% yield loss
  7. Roundup Drift on Peanut From Drone (3 qt/A + COC @ 3 GPA)
  8. Roundup/Peanut
  9. Gunslinger AMP (aminopyralid + 2,4-D) Sprayer Contamination (24 oz/A applied to pasture then rinsed out) July 22, 2024 21 DAT GA-12Y 60 DAP
  10. Gunslinger AMP (aminopyralid + 2,4-D) Sprayer Contamination (24 oz/A applied to pasture then rinsed out) August 20, 2024 50 DAT GA-12Y 60 DAP NTC Treated Final Story Treated = 5000 lbs/A (-8%) 68-72 grade Non-Treated = 5400 lbs/A 1/100X rate based on 2024 data
  11. Numerical Peanut Yield Loss (%) from “Non-Peanut” Herbicides Applied at 1/10X Rates at Different Times in Georgia
  12. Gunslinger AMP Sprayer Cleanout
  13. Cadre “Yellow Flash” – 3 DAT TREATED NTC June 25, 2010 GA-06G
  14. Yellow Nutsedge Control with Cadre @ 4 oz/A + Agridex @ 1% v/v - 2019 PE-17-19 Applied May 22 6-12” at application May 31 9 DAT June 3 12 DAT June 12 21 DAT June 24 33 DAT July 16 55 DAT
  15. Cadre Not Working on Yellow Nutsedge Anymore? PE-16-23 August 29 120 DAP Prowl H20 @ 32 oz/A Valor EZ @ 3 oz/A Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A Warrant @ 48 oz/A Butyrac @ 16 oz/A Agridex @ 1% v/v (34 DAP) Prowl H20 @ 32 oz/A Valor EZ @ 3 oz/A Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A Enversa @ 48 oz/A Butyrac @ 16 oz/A Agridex @ 1% v/v (34 DAP) Prowl H20 @ 32 oz/A Valor EZ @ 3 oz/A Strongarm @ 0.225 oz/A (PRE) Cobra @ 12.5 oz/A Warrant @ 48 oz/A Butyrac @ 16 oz/A Agridex @ 1% v/v (34 DAP)
  16. Cadre (imazapic) Resistant Yellow Nutsedge – 28 DAT Sensitive Resistant Cadre 2AS @ 4 oz/A (0.07 kg ai/ha)
  17. Yellow Nutsedge/Cadre Samples-2024
  18. Yellow Nutsedge Control with Broadloom (bentazon) - 2019 NC-04-19 August 7 13 days after POST2 NTC Broadloom 4SL @ 32 oz/A Agridex @ 1% v/v 2 POST applications 10 days apart
  19. Yellow Nutsedge Control with Split Shot of Basagran (32 oz/A) + Crop Oil (1% v/v) – Field was previously treated with Cadre @ ~40 DAP. (Basagran + COC was applied August 30 then September 10) Berrien Co. (2024) 08/27/24 - Before 09/17/24 - After
  20. Dicamba Preplant? NO, NO, NO!!!! C. Jones Birdsong Peanuts June 2024
  21. Dicamba Preplant in Peanut (Not Labeled, need at least 28 D + 1” rainfall/irrigation) W. Briggs 06/14/24
  22. Do What? Prowl @ 16 oz/A ($5.88) Brake @ 16 oz/A ($23.23) Dual @ 16 oz/A ($8.88) Liberty @ 32 oz/A ($6.00) Clethodim @ 16 oz/A ($6.88) Zaltus @ 1.5 oz/A ($3.47) Strongarm @ 0.45 oz/A ($20.18) Roundup @ 24 oz/A ($4.03) Crop Oil @ 12.8 oz/A ($2.00) Total Cost/A = ~$80.55 C.A. Abbott SePro May 8, 2024 VA Grower
  23. Peanut/pH/Zinc Examples: Waters: 1) Good: pH = 6.2, Zn = 8.4 lbs/A; Bad: pH = 5.4, Zn = 5.8 lbs/A Riden: 1) Good: pH = 5.9, Zn = 9.9 lbs/A; Bad: pH = 5.0, Zn = 5.0 lbs/A Berrien Co. 2024
  24. Peanut/pH/Zn Good: pH = 5.8; Zn = 3 lbs/A Bad: pH = 4.6; Zn = 108 lbs/A Burke Co. July 2024
  25. Peanut Weed Control Programs
  26. Herbicide Use in Georgia Peanuts (2018 and 2023) Sources: USDA/NASS: 2018 Agrichemical Use Survey-Peanut, May 2019, No. 2019-2; 2023 Agrichemical Use Survey-Peanut, May 2024, No. 2024-3.
  27. Peanut Weed Control - 2024 PE-07-24 July 22 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 Butyrac 200 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A POST (34 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 Butyrac 200 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A POST (34 DAP)xxx 4646 lbs/A 4681 lbs/A
  28. Peanut Weed Control - 2024 PE-18-24 July 22 82 DAP Gramoxone 3SL @ 8 oz/A Basagran 5L @ 6.4 oz/A Dual Magnum 7.62EC @ 16 oz/A EPOST (12 DAP) Cadre 2AS @ 4 oz/A Butyrac 200 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A POST (34 DAP) Gramoxone 3SL @ 8 oz/A Bastante 4SL @ 8 oz/A Dual Magnum 7.62EC @ 16 oz/A EPOST (12 DAP) Actylis (imazapic) 2AS @ 4 oz/A Actylis (2,4-DB) 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A POST (34 DAP) NTC 4024 lbs/A 4123 lbs/A
  29. WSSA Group 15 Herbicides?
  30. Storm vs. “Georgia” Storm - 2024 PE-10-24 June 3 21 DAT NTC Gramoxone 3SL @ 8 oz/A Storm 4SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Gramoxone 3SL @ 8 oz/A Ultra Blazer 2LC @ 16 oz/A Broadloom 4LC @ 8 oz/A Dual Magnum 7.62EC @ 16 oz/A
  31. Peanut Weed Control - 2024 Cadre/Ultra Blazer/Cobra/2,4-DB/Dual Magnum Tank-Mixes (15 GPA, AIXR11002 Tips) PE-20-24 July 22 61 DAT NTC Cadre 2AS @ 4 oz/A Butyrac 200 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Cadre 2AS @ 4 oz/A Cobra 2EC @ 12.5 oz/A Butyrac 200 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Cadre 2AS @ 4 oz/A Ultra Blazer 2SL @ 24 oz/A Butyrac 200 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A
  32. Valor Injury - 2019 PE-07-19 May 14 13 DAP NTC 3 oz/A 6 oz/A
  33. Valor Effects on Peanut Yield High Moisture Conditions - 2019 PE-07-19 - Weed-free - 8.3” rainfall/irrigation first 30 DAP P = 0.7798 CV = 10.6 *averaged over 4 Dual Magnum rates lbs/A
  34. Valor causes injury but what about weed control? Dryland Valor + Prowl Timely rain after application Old Age or “Natties” D. Hall June 4, 2024
  35. Peanut Yield as Influenced By Valor 50WG (3 oz/A) Timing (Only Valor + Water was Applied at Listed Timings) PE-16-01 GA Green Planted May 8, 2001 lbs/A LSD 0.05 = 729 CV = 14.33 Time (DAP) “True Crack” 2” tall 3 leaf 21%-67% yield loss! Prowl PPI @ 2.4 ptA Irrigation: 1 DAP = 0.50” irrigation 8 DAP = 0.65” irrigation 13 DAP = 0.50” irrigation Historic Rainfall Avg. (May 8-29) 21 DAP 2.44”
  36. New Stuff Where’s Bob?
  37. Generic Strongarm? Aceto/Actylis Only 2 years of field data? 25 years with Strongarm Cheaper than brand name? No problems thus far. Label has expanded POST section.
  38. Peanut Weed Control - 2024 PE-18-24 July 22 82 DAP NTC Sonalan 3EC @ 32 oz/A Valor EZ @ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A PRE Cadre 2AS @ 4oz/A Butyrac 200 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A POST (34 DAP) Actylis (ethalfluralin) 3EC @ 32 oz/A Valor EZ @ 4SC @ 3 oz/A Diclom 84WG @ 0.225 oz/A PRE Actylis (imazapic) 2AS @ 4oz/A Actylis (2,4-DB) 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A POST (34 DAP) 4215 lbs/A 4271 lbs/A
  39. Brake Injury – 2024 (Grower Field) GA-18RU (Planted April 25); Brake @ 12 oz/A + Dual Magnum @ 22 oz/A (April 27) T. Price Cook Co. May 17
  40. Brake Label Issues “Apply prior to planting or within 36 hours after planting” Equipment issues? Weather?
  41. 2024 Brake/Rexovor Timing Study PE-02-24 1 DAP 3 DAP 5 DAP 7 DAP
  42. Brake/Rexovor Timing – 2024 Brake 1.2SC @ 12 oz/A PE-08-24 May 13 12 DAP NTC 5 DAP 7 DAP
  43. Peanut (GA-06G) Yield Response to Brake Timing (2022-2024) P = 0.63 Yield (lbs/A)
  44. Pendimethalin Formulations Pendalin H20
  45. Weed Control in Peanut with Different Pendimethalin Formulations - 2024 PE-01-24 June 11 41 DAT NTC Prowl H20 3.8SC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A PRE Pendalin H20 3.8SC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A PRE Satellite Hydrocap 3.8SC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A PRE
  46. Enversa™ Corteva Ecapsulated acetochlor Similar to but NOT the same as Warrant Moisture activation issues? Delay irrigation for 48 hours Only 1 year of data for me
  47. Weed Control in Peanut - 2024 PE-16-24 June 14 44 DAP NTC Warrant 3ME @ 48 oz/A PRE Enversa 3ME @ 48 oz/A PRE 0 DAT = 0.5” I 2 DAT = 0.9” R 7 DAT = 0.75”R 8 DAT = 0.75” R 11 DAT = 1.1” R
  48. Weed Control in Peanut - 2024 PE-16-24 July 22 82 DAP NTC Prowl H20 3.8SC @ 32 oz/A Valor EZ 4SC @ 3 oz/A PRE Cadre 2AS @ 4 oz/A Butyrac 200 2SL @ 16 oz/A Warrant 3ME @ 48 oz/A Agridex @ 1% v/v POST (34 DAP) Prowl H20 3.8SC @ 32 oz/A Valor EZ 4SC @ 3 oz/A PRE Cadre 2AS @ 4 oz/A Butyrac 200 2SL @ 16 oz/A Enversa 3ME @ 48 oz/A Agridex @ 1% v/v POST (34 DAP)
  49. What do the top Georgia peanut growers do? 2023 Georgia Peanut Achievement Club Winners 16 growers 142 to 1473 acres (range) ~520 acres (average) 5734 lb/A average yield 4630-6357 lbs/A (range) 2023 GA State Avg. = 4080 lb/A 100% - irrigated 56% - bottom plow 75% - twin rows Herbicides 40% - Sonalan 93% - Valor 53% - Dual 73% - Cadre 47% - 2,4-DB 33% - Prowl 33% - Strongarm 13% - Zidua 13% - paraquat 20% - Storm
  50. Questions/Comments