Slide Presentation

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Caparol® (prometryn) or Reglone® (diquat) for Weed Control in Peanut??

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

Nicholas J. Shay
Graduate Research Assistant
University of Georgia

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TABLE OF CONTENTS
  1. Caparol® (prometryn) or Reglone® (diquat) for Weed Control in Peanut??
  2. U.S. Row Crop Production 2024 - Acres Planted
  3. Peanut Herbicide History Since the 1980's
  4. The Future of Herbicides?
  5. PPO-Resistance (PRE and POST) Has Recently Been Confirmed in Georgia (Randell-Singleton et al. 2024)
  6. Caparol®
  7. Prometryn®
  8. Caparol® and Pigweed?
  9. Reglone®
  10. Materials and Methods
  11. Results - 2022
  12. Peanut Stunting - 2022 (12 DAT)
  13. Peanut Weed Control - 2022 (22 DAT)
  14. Peanut Weed Control - 2022 - Valor + Strongarm vs. Caparol + Strongarm
  15. Peanut Weed Control - 2022 - Valor + Strongarm vs. Caparol + Strongarm
  16. Peanut Yield - 2022
  17. Results - 2023
  18. Peanut Stunting - 2023 (14 DAT)
  19. Peanut Weed Control - 2023 (20 DAT)
  20. Peanut Weed Control - 2023 Valor + Strongarm vs. Caparol + Strongarm
  21. Peanut Weed Control - 2023 Valor + Strongarm vs. Caparol + Strongarm
  22. Peanut Yield - 2023
  23. Reglone®
  24. Peanut Injury (%) - 2023 (2 DAT)
  25. Peanut Injury - 2 DAT
  26. Weed Control (%) - 2023 (8 DAT)
  27. Gramoxone vs. Reglone - 2023 - 35 DAP
  28. Gramoxone vs. Reglone - 2023 - 83 DAP
  29. Peanut Yield - 2023
  30. Summary/Future
  31. Gramoxone vs. Reglone - 2024
  32. Weed Control in Peanut - 2024
  33. Questions/Comments?



SLIDE CONTENTS
  1. Caparol® (prometryn) or Reglone® (diquat) for Weed Control in Peanut?? Eric P. Prostko* and Nick J. Shay University of Georgia Dept. Crop & Soil Sciences
  2. U.S. Row Crop Production – 2024 Acres Planted Source: USDA/NASS, Acreage (06/28/24)
  3. Peanut Herbicide History Since the 1980’s Frontier - 1996 Dual Magnum - 1997 Outlook - 1999 Strongarm - 2000 Valor - 2001 Spartan - 2003 Cobra - 2005 Fusilade - 2009 Warrant - 2014 Zidua - 2017 Anthem Flex - 2020 Brake - 2023 Rexovor - ???????? Liberty - ??????? Dual - 1980 Poast - 1985 Premerge/Dinitro/ Dyanap (dinoseb) was cancelled in 1986 Sonalan - 1988 Classic - 1988 Paraquat - 1988 Lasso (alachlor) Issues - 1991 Pursuit - 1991 Zorial/Solicam - 1993 Tough - 1992 Select - 1996 Cadre - 1996
  4. The Future of Herbicides?
  5. PPO-Resistance (PRE and POST) Has Recently Been Confirmed in Georgia (Randell-Singleton et al. 2024)
  6. Caparol® Prometryn Commercially available in cotton in 1964 Same herbicide family as atrazine Triazine HRAC/WSSA Group 5 PSII-Inhibitor Peanut label in other countries? Australia 2024 Prices Caparol 4L @ 32 oz/A (~$10) vs. Valor EZ 4SC @ 3 oz/A (~$12)
  8. Caparol® and Pigweed? *Source: Whitaker et al. 2011. Journal of Cotton Science 15:89-99.
  9. Reglone® Diquat Been around since 1955 Same herbicide family as paraquat Bipyridilium Harvest Aid/Desiccant alfalfa, canola, clover, potato, tree/vine/small fruits/vegetables (non-bearing) HRAC/WSSA Group 22 PSI inhibitor 2024 Prices Gramoxone 3SL @ 8 oz/A (~$2) vs. Reglone 2SL @ 12 oz/A (~$8) diquat paraquat
  10. Materials and Methods UGA Ponder Farm (Ty Ty) small plots, 15 GPA, 11002AIXR tips 2022 Caparol 4L @ 24, 32, 48 oz/A alone and in tank-mixes RCBD, 3 reps 2023 Repeated 2022 Caparol test Reglone 2SL @ 6.4 and 8.6 oz/A compared to Gramoxone 2SL Lower rates (oopsy) ANOVA, P=0.10, Fisher’s
  11. Results - 2022 Screven Co. 2021
  12. Peanut Stunting – 2022 (12 DAT) Sonalan HFP 4EC @ 32 oz/A Valor EZ @ 3 oz/A Strongarm 84WG @ 0.225 oz/A Caparol 4L @ 24 oz/A
  13. Peanut Weed Control – 2022 (22 DAT) Sonalan HFP 4EC @ 32 oz/A Valor EZ @ 3 oz/A Strongarm 84WG @ 0.225 oz/A Caparol 4L @ 24 oz/A LSD 0.10 = 3.44 LSD 0.10 = 3.83
  14. Peanut Weed Control - 2022 Valor + Strongarm vs. Caparol + Strongarm PE-12-22 May 20 22 DAT NTC Sonalan HFP 4EC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A Applied PRE (1 DAP) Sonalan HFP 4EC @ 32 oz/A Caparol 4L @ 24 oz/A Strongarm 84WG @ 0.225 oz/A Applied PRE (1 DAP)
  15. Peanut Weed Control - 2022 Valor + Strongarm vs. Caparol + Strongarm PE-12-22 June 21 55 DAP NTC Sonalan HFP 4EC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A PRE (1 DAP) Cadre 2AS @ 4 oz/A 2,4-DB 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A POST (27 DAP) Sonalan HFP 4EC @ 32 oz/A Caparol 4L @ 24 oz/A Strongarm 84WG @ 0.225 oz/A PRE (1 DAP) Cadre 2AS @ 4 oz/A 2,4-DB 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A POST (27 DAP)
  16. Peanut Yield – 2022 Sonalan HFP 4EC @ 32 oz/A Valor EZ @ 3 oz/A Strongarm 84WG @ 0.225 oz/A Caparol 4L @ 24 oz/A
  17. Results - 2023
  18. Peanut Stunting – 2023 (14 DAT) Prowl H20 3.8SC @ 32 oz/A Valor EZ @ 3 oz/A Strongarm 84WG @ 0.225 oz/A Caparol 4L @ 32 oz/A
  19. Peanut Weed Control – 2023 (20 DAT) Prowl H20 3.8SC @ 32 oz/A Valor EZ @ 3 oz/A Strongarm 84WG @ 0.225 oz/A Caparol 4L @ 32 oz/A LSD 0.10 = 6.15 LSD 0.10 = 12.88
  20. Peanut Weed Control – 2023 Valor + Strongarm vs. Caparol + Strongarm 1st rainfall/irrigation event was 8 DAP (0.5” irrigation) PE-14-23 May 24 21 DAP NTC Prowl H20 3.8SC @ 32 oz/A Valor EZ 4SC @ 3 oz/A Strongarm 84WG @ 0.225 oz/A Prowl H2O 3.8SC @ 32 oz/A Caparol 4L @ 32 oz/A Strongarm 84WG @ 0.225 oz/A
  21. Peanut Weed Control - 2023 Valor + Strongarm vs. Caparol + Strongarm PE-14-23 June 28 56 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 POST2 (28 DAP) Prowl H20 3.8SC @ 32 oz/A Caparol 4L @ 32 oz/A Strongarm 84WG @ 0.225 oz/A PRE (1 DAP) Cadre 2AS @ 4 oz/A Cobra 2EC 12.5 oz/A Dual Magnum 7.62EC @ 16 oz/A 2,4-DB 2SL @ 16 oz/A POST1 (22 DAP)
  22. Peanut Yield – 2023 Prowl H20 3.8SC @ 32 oz/A Valor EZ @ 3 oz/A Strongarm 84WG @ 0.225 oz/A Caparol 4L @ 32 oz/A
  23. Reglone®
  24. Peanut Injury (%) – 2023 (2 DAT) Gramoxone 2SL @ 12 oz/A Storm 4SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Reglone 2SL @ 8.6 oz/A (LSD 0.10 = 2.45) (LSD 0.10 = 2.82)
  25. Peanut Injury – 2 DAT NTC Gramoxone + Storm + Dual Magnum Reglone + Storm + Dual Magnum
  26. Weed Control (%) – 2023 (8 DAT) Gramoxone 2SL @ 12 oz/A Storm 4SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Reglone 2SL @ 8.6 oz/A (LSD 0.10 = 10.84) (LSD 0.10 = NS) (LSD 0.10 = 5.85) (LSD 0.10 = 8.09)
  27. Gramoxone vs. Reglone - 2023 PE-12-23 June 7 35 DAP NTC Gramoxone 2SL @ 12 oz/A Storm 4SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Applied 13 DAP Cadre 2AS @ 4 oz/A Dual Magnum 7.62EC @ 16 oz/A 2,4-DB 2SL @ 16 oz/A Applied 27 DAP Reglone 2SL @ 8.6 oz/A Storm 4SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Applied 13 DAP Cadre 2AS @ 4 oz/A Dual Magnum 7.62EC @ 16 oz/A 2,4-DB 2SL @ 16 oz/A Applied 27 DAP
  28. Gramoxone vs. Reglone - 2023 PE-12-23 July 24 83 DAP NTC Gramoxone 2SL @ 12 oz/A Storm 4SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Applied 13 DAP Cadre 2AS @ 4 oz/A Dual Magnum 7.62EC @ 16 oz/A 2,4-DB 2SL @ 16 oz/A Applied 27 DAP Reglone 2SL @ 8.6 oz/A Storm 4SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Applied 13 DAP Cadre 2AS @ 4 oz/A Dual Magnum 7.62EC @ 16 oz/A 2,4-DB 2SL @ 16 oz/A Applied 27 DAP
  29. Peanut Yield – 2023 Gramoxone 2SL @ 12 oz/A Storm 4SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A Reglone 2SL @ 8.6 oz/A
  30. Summary/Future Caparol® Less injurious than Valor Less effective than Valor Moisture activation issues OK in PRE + POST system? Reglone® Less or more injurious than Gramoxone?? rate Similar weed control to Gramoxone $/A Future Repeated studies in 2024 Caparol tank-mixes with Valor, Brake, Rexovor (ALS-resistant AMAPA) Appropriate rates for Reglone
  31. Gramoxone vs. Reglone - 2024 PE-10-24 June 28 59 DAP NTC Gramoxone 3SL @ 8 oz/A Storm 4SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A EPOST (13 DAP) Cadre 2AS @ 4 oz/A Dual Magnum 7.62EC @ 16 oz/A Butyrac 20 2SL @ 16 oz/A POST (34 DAP) Reglone 2SL @ 12 oz/A Storm 4SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A EPOST (13 DAP) Cadre 2AS @ 4 oz/A Dual Magnum 7.62EC @ 16 oz/A Butyrac 20 2SL @ 16 oz/A POST (34 DAP)
  32. Weed Control in Peanut - 2024 PE-07-24 June 28 59 DAP NTC Prowl H20 3.8SC @ 32 oz/A Caparol 4L @ 32 oz/A Brake 1.2SL @ 12 oz/A PRE Cadre 2AS @ 4 oz/A Butyrac 200 2SL @ 16 oz/A Dual Magnum 7.62EC @ 16 oz/A POST (34 DAP)
  33. Questions/Comments? www.gaweed.com