Slide Presentation

TITLE    (click title to view slides)
2026 Peanut Weed Control Update

AUTHOR
Eric P. Prostko
Extension Weed Specialist
Dept. Crop & Soil Sciences
University of Georgia

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TABLE OF CONTENTS
  1. 2026 Peanut Weed Control Update
  2. Peanut (GA-06G) Yield As Influenced by Treatment
  3. Peanut (GA-06G) Yield As Influenced by Treatment
  4. This Ain't Starting Clean!!!
  5. Treflan vs. Sonalan vs. Prowl
  6. Prowl vs. Sonalan vs. Treflan - 2025
  7. Prowl vs. Sonalan - 2025
  8. Herbicide Use in Georgia Peanuts - 2018 and 2023
  9. Pendimethalin Formulations - 2025
  10. Peanut Weed Control - 2025 'Timely' Program
  11. Did not get a PRE out ??? No worries!
  12. Brake (fluridone)?
  13. Peanut Weed Control - 2025 Georgia 4-WAY?
  14. Cadre "Yellow Flash" - 3 DAT
  15. Strongarm "Yellow" Flash
  16. Are these Palmer amaranth plants small?
  17. Palmer Amaranth Height 8 Days After Tillage
  18. Deposition Aids for Herbicides?
  19. Sonalan 3EC @ 32 oz/A + Valor EZ 4SC @ 3 z/A + Strongarm 84WG @ 0.225 oz/A - Applied PRE then Cadre 2AS @ 3 oz/A + Cobra 2EC @ 12.5 oz/A + Butyrac 2SL @ 16 oz/A + Dual Magnum 7.62EC @ 16 oz/A Applied POST (38 DAP) (with or without adjuvants)
  20. Sonalan 3EC @ 32 oz/A + Valor EZ 4SC @ 3 z/A + Strongarm 84WG @ 0.225 oz/A - Applied PRE then Cadre 2AS @ 3 oz/A + Cobra 2EC @ 12.5 oz/A + Butyrac 2SL @ 16 oz/A + Dual Magnum 7.62EC @ 16 oz/A Applied POST (38 DAP) (with or without adjuvants)
  21. 2025 DRA/Peanut Study
  22. DRA/Peanut Study - 2025
  23. DRA/Peanut Study - 2025
  24. DRA/Peanut Study - 2025
  25. DRA/Peanut Study - 2025
  26. DRA/Peanut Study - 2025
  27. DRA/Peanut Study - 2025
  28. 2025 HPPD/Peanut Rotation Study
  29. 2025 HPPD/Peanut Rotation Study - HPPD Applied 57 DBP
  30. 2025 HPPD/Peanut Rotation Study - HPPD Applied 57 DBP
  31. 2025 HPPD/Peanut Rotation Study - HPPD Applied 57 DBP
  32. 2025 HPPD/Peanut Rotation Study - HPPD Applied 57 DBP
  33. Peanut Yield (lbs/A)
  34. Problems - 2025
  35. Beware of Google/AI Recommendations!
  36. Peanut and Atrazine - 2025, Atrazine @ ~65 DAP
  37. Peanut Yield Response to Aatrex 4L (atrazine)
  38. Liberty Drift on Peanut From Drone
  39. Dicamba Injury on Peanut - 2025
  40. Peanut Injury? Roundup or Atrazine or K Deficiency or B Toxicity?
  41. Herbicide Residues Detected in Cotton Tissue Samples as Influenced by Time After Application
  42. Trifloxysulfuron Injury Peanut - 2025
  43. What do the top Georgia peanut growers do? 2024 Georgia Peanut Achievement Club Winners
  44. Questions/Comments/Thanks for Listening!



SLIDE CONTENTS
  1. 2026 Peanut Weed Control Update Eric P. Prostko Extension Weed Specialist Dept. Crop & Soil Sciences
  2. Peanut (GA-06G) Yield As Influenced by Treatment Yield (lbs/A) PE-09-25
  3. Peanut (GA-06G) Yield As Influenced by Treatment Yield (lbs/A) PE-09-25 LSD (P=0.10) = 1101 CV = 24.1 ab
  4. This Ain’t Starting Clean!!!
  5. Treflan vs. Sonalan vs. Prowl Treflan (trifluralin) Sonalan (ethalfluralin) Dinitroaniline Herbicide Family, HRAC/WSSA Group 3 Inhibitors of microtubule assembly Prowl (Pendimethalin)
  6. Prowl vs. Sonalan vs. Treflan** - 2025 (0.5” irrigation-24 HAT) PE-01-25 June 11 37 DAP NTC Prowl H20 3.8SC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A (PRE) Sonalan HFP 4EC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A (PRE) Treflan 4EC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A (PRE) **Treflan is NOT labeled for use on peanuts in the SE. Only NM, OK and TX!!
  7. Prowl vs. Sonalan - 2025 (0.5” irrigation-24 HAT) PE-01-25 June 11 37 DAP NTC Prowl H20 3.8SC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A (PRE) Sonalan HFP 4EC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A (PRE)
  8. 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.
  9. Pendimethalin Formulations - 2025 PE-01-25 June 11 37 DAP 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)
  10. Peanut Weed Control - 2025 “Timely” Program PE-10-25 July 10 72 DAP NTC
  11. Did not get a PRE out ??? No worries! Estimated total herbicide cost = $43.38/A PE-10-25 June 23 55 DAP Gramoxone 3SL @ 8 oz/A Ultra Blazer 2SL @ 16 oz/A Basagran 5SL @ 6.4 oz/A Enversa 3ME @ 48 oz/A Induce @ 0.25 v/v EPOST (15 DAP) Cadre 2AS @ 4 oz/A Cobra 2EC @ 12.5 oz/A Butyrac 200 2SL @ 16 oz/A Enversa 3ME @ 48 oz/A Induce @ 0.25% v/v POST (29 DAP)
  12. Brake (fluridone)? 2025 Brake Price = $165/gal (12 oz/A = $15.47/A)
  13. Peanut Weed Control – 2025 Georgia 4-WAY? ($51.94/A) PE-07-25 July 9 69 DAP NTC Prowl H20 3.8SC @ 32 oz/A PPI Brake 1.2SC @ 8 oz/A Valor EZ 4SC @ 1.5 oz/A Strongarm 84WG @ 0.225 oz/A PRE Cadre 2AS @ 4 oz/A Cobra 2EC @ 12.5 oz/A Butyrac 200 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A POST (42 DAP) Prowl H20 3.8SC @ 32 oz/A Brake 1.2SC @ 8 oz/A Valor EZ 4SC @ 1.5 oz/A Strongarm 84WG @ 0.225 oz/A PRE Cadre 2AS @ 4 oz/A Cobra 2EC @ 12.5 oz/A Butyrac 200 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A POST (42 DAP)
  14. Cadre “Yellow Flash” – 3 DAT TREATED NTC June 25, 2010 GA-06G
  15. Strongarm “Yellow” Flash
  16. Are these Palmer amaranth plants small?
  17. Palmer Amaranth Height 8 Days After Tillage GS-01-25 August 19 Low = 1”; High = 7”; Average = 3.7” 50% > than average
  18. Deposition Aids for Herbicides?
  19. Sonalan 3EC @ 32 oz/A + Valor EZ 4SC @ 3 z/A + Strongarm 84WG @ 0.225 oz/A - Applied PRE then Cadre 2AS @ 3 oz/A + Cobra 2EC @ 12.5 oz/A + Butyrac 2SL @ 16 oz/A + Dual Magnum 7.62EC @ 16 oz/A Applied POST (38 DAP) (with or without adjuvants) PE-04-25 July 10 67 DAP NTC No Adjuvant + Grounded @ 16 oz/A + 6.4Rivet @ 16 oz/A + Infuse @ 16 oz/A
  20. Sonalan 3EC @ 32 oz/A + Valor EZ 4SC @ 3 z/A + Strongarm 84WG @ 0.225 oz/A - Applied PRE then Cadre 2AS @ 3 oz/A + Cobra 2EC @ 12.5 oz/A + Butyrac 2SL @ 16 oz/A + Dual Magnum 7.62EC @ 16 oz/A Applied POST (38 DAP) (with or without adjuvants) PE-04-25 LSD 0.10 = 549 CV = 8.41 abc bc bc
  21. 2025 DRA/Peanut Study
  22. DRA/Peanut Study - 2025 PE-03-25 July 10 66 DAP Prowl H20 @ 32 oz/A Valor EZ @ 3 oz/A Strongarm @ 0.225 oz/A PRE Cadre @ 4 oz/A Cobra @ 12.5 oz/A Butyrac @ 16 oz/A Dual Magnum @ 16 oz/A POST (37 DAP) NTC No DRA Clasp @ 32 oz/100 gals
  23. DRA/Peanut Study - 2025 PE-03-25 July 10 66 DAP Gramoxone @ 8 oz/A Ultra Blazer @ 16 oz/A Basagran @ 6.4 oz/A Dual Magnum @ 16 oz/A EPOST (14 DAP) Cadre @ 4 oz/A Cobra @ 12.5 oz/A Butyrac @ 16 oz/A Dual Magnum @ 16 oz/A POST (37 DAP) NTC No DRA Clasp @ 32 oz/100 gals
  24. DRA/Peanut Study - 2025 PE-03-25 July 10 66 DAP Prowl H20 @ 32 oz/A Valor EZ @ 3 oz/A Strongarm @ 0.225 oz/A PRE Cadre @ 4 oz/A Cobra @ 12.5 oz/A Butyrac @ 16 oz/A Dual Magnum @ 16 oz/A POST (37 DAP) NTC No DRA InterLock @ 4 oz/A
  25. DRA/Peanut Study - 2025 PE-03-25 July 10 66 DAP Gramoxone @ 8 oz/A Ultra Blazer @ 16 oz/A Basagran @ 6.4 oz/A Dual Magnum @ 16 oz/A EPOST (14 DAP) Cadre @ 4 oz/A Cobra @ 12.5 oz/A Butyrac @ 16 oz/A Dual Magnum @ 16 oz/A POST (37 DAP) NTC No DRA InterLock @ 4 oz/A
  26. DRA/Peanut Study - 2025 PE-03-25 July 10 66 DAP Prowl H20 @ 32 oz/A Valor EZ @ 3 oz/A Strongarm @ 0.225 oz/A PRE Cadre @ 4 oz/A Cobra @ 12.5 oz/A Butyrac @ 16 oz/A Dual Magnum @ 16 oz/A POST (37 DAP) NTC No DRA Reign @ 32 oz/100 gals
  27. DRA/Peanut Study - 2025 PE-03-25 July 10 66 DAP Gramoxone @ 8 oz/A Ultra Blazer @ 16 oz/A Basagran @ 6.4 oz/A Dual Magnum @ 16 oz/A EPOST (14 DAP) Cadre @ 4 oz/A Cobra @ 12.5 oz/A Butyrac @ 16 oz/A Dual Magnum @ 16 oz/A POST (37 DAP) NTC No DRA Reign @ 32 oz/100 gals
  28. 2025 HPPD/Peanut Rotation Study Current Rotation Restrictions for Peanuts Callisto (mesotrione) = 10 months Impact (topramezone) = 9 Months Laudis (tembotrione) = 11 months Shieldex (tolpyralate) = 9 months
  29. 2025 HPPD/Peanut Rotation Study HPPD Applied 57 DBP PE-08B-25 July 10 57 DAP NTC Laudis 3.5SC @ 6 oz/A
  30. 2025 HPPD/Peanut Rotation Study HPPD Applied 57 DBP PE-08B-25 July 10 57 DAP NTC Impact 2.8SC @ 1.5 oz/A
  31. 2025 HPPD/Peanut Rotation Study HPPD Applied 57 DBP PE-08B-25 July 10 57 DAP NTC Callisto 4SC @ 6 oz/A
  32. 2025 HPPD/Peanut Rotation Study HPPD Applied 57 DBP PE-08B-25 July 10 57 DAP NTC Shieldex 3.33SC @ 2 oz/A
  33. P=0.3123 CV= 5.44 TifNV-HG
  34. Problems - 2025
  35. Beware of Google/AI Recommendations!
  36. Peanut and Atrazine – 2025 Atrazine @ ~65 DAP B. Hayes August 18 ~5-7 DAT
  37. Peanut Yield Response to Aatrex 4L (atrazine) PE-02-25 GA-06G LSD 0.10 = 681 CV = 11.8
  38. Liberty Drift on Peanut From Drone Corn sprayed 08/13/25 Sample collected 08/21/25 J. Kichler 08/19/25
  39. Dicamba Injury on Peanut - 2025 Dicamba Applied: April 5 Peanut Planted: April 29 24 days after applicaton No rain from application until 0.6” day after planting. Only 25% peanut emergence Dicamba is not labeled for preplant use in peanut! If it was (but never will be): 0.50 lb ae/A = 28 days + 1” irrigation/ rainfall 0.25 lb ae/A = 14 days + 1” irrigation/ rainfall J. Odom May 12, 2025
  40. Peanut Injury? Roundup or Atrazine or K Deficiency or B Toxicity? Roundup and Atrazine tests were negative? Sampled too late??? Potassium (K) in leaf tissue was 3.85% sufficiency range = 1.70-3.00% Boron (B) was very high in leaf tissue analysis (174 ppm) sufficiency range = 20-60 ppm B toxicity in peanut tissue is likely when B concentration exceeds 100 ppm. Grower applied 1 qt/A of B (10%) in 2nd and 4th fungicide sprays. T. Price Cook Co. 09/18/25
  41. Herbicide Residues Detected in Cotton Tissue Samples as Influenced by Time After Application* *Source: Wright-Smith HE, Culpepper AS, Crabtree CR, Grey TL, Randell-Singleton TM, Vance JC (2024) Herbicide residue detection in cotton as influenced by time, drift rate, and sampling method. Weed Sci. 72: 798–803.
  42. Trifloxysulfuron Injury Peanut - 2025 Recognition 20.4WDG @ 1.95 oz/A applied in April? 0.0249 lb ai/A 2.1X to 5.3X of cotton rate Peanuts Planted in May? Same ai as Envoke in cotton Envoke 75WDG 0.10-0.25 oz/A 0.0047-0.0117 lb ai/A 7 month peanut plant-back restriction 0.003 and 0.007 ai/A PRE reduced peanut yields 7.5% and 12.6%. Porterfield and Wilcut (2003). Weed Technology 17(3):41-445. J. Bennett/J. Porter Wilcox/Pulaski Co. June 2025
  43. What do the top Georgia peanut growers do? 2024 Georgia Peanut Achievement Club Winners 16 growers 116 to 1520 acres (range) 5360 lb/A average yield 4145-6089 lbs/A (range) 2024 GA State Avg. = 3800 lbs/A 100% - irrigated 79% - conventional tillage 71% - twin rows Top 5 Herbicides 100%: flumioxazin 100%: s-metolachlor/metolachlor 79%: 2,4-DB 71%: diclosulam 64%: imazapic
  44. Questions/Comments/Thanks for Listening!