Slide Presentation

TITLE    (click title to view slides)
2024 Soybean and Grain Sorghum Weed Control Update

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

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TABLE OF CONTENTS
  1. 2024 Soybean Weed Control Update
  2. Soybean Weed Control Simplified
  3. Metribuzin Products
  4. Metribuzin Tolerant Soybean Cultivars
  5. Soybean Weed Control - 2023
  6. Valor in GA Soybeans?
  7. But would be OK with ...
  8. Soybean Weed Control - 2023
  9. Enlist Soybeans - 2023
  10. Dicamba Soybeans - Hooded Sprayers
  11. 'Old School' Conventional Systems
  12. Weed Control in Conventional Soybeans
  13. Conventional Soybeans
  14. Conventional Soybeans - 2023
  15. New Stuff? ZALO 2.57SL
  16. Weed Control in Soybeans - 2023
  17. Liberty Ultra 1.76SL
  18. LibertyLink GT27 - tolerant to glyphosate, glufosinate, isoxaflutole (Alite 27)
  19. Tropical Spiderwort - 2022
  20. Other Options??? (Seedbank Mgt.)
  21. Double-Cropped Soybean Behind Field Corn
  22. HPPD/Soybean Test - 2023 Planted 92 DAT
  23. HPPD/Soybean Test - 2023 Planted 92 DAT
  24. Soybean Yield Response to HPPD Herbicides Applied 92 DBP* - 2023
  25. Questions/Comments
  26. Weed Control in Grain Sorghum - 2024
  27. Grain Sorghum Weed Control
  28. A New (er) Product to Consider?
  29. Grain Sorghum Weed Control - 2021
  30. Huskie Injury on Sorghum
  31. Texas Panicum in Grain Sorghum
  32. New Grain Sorghum Weed Control Technologies (Non-GMO)
  33. Grain Sorghum Weed Control - 2022 I-Growth
  34. Igrowth Grain Sorghum Hybrids
  35. DoubleTeam Sorghum - 2022
  36. DoubleTeam System - First Act Off-Types
  37. DoubleTeam Sorghum Hybrids
  38. Inzen Grain Sorghum - 2022
  39. Questions/Comments?



SLIDE CONTENTS
  1. 2024 Soybean Weed Control Update Eric P. Prostko Professor and Extension Weed Specialist Dept. Crop & Soil Sciences
  2. Soybean Weed Control Simplified Start clean Narrow rows (< 30”) PRE Metribuzin + Group 15 or Prowl tolerant variety Irrigation or rainfall POST + Residual (weeds <3” tall) Post = Reflex or Prefix or Warrant Ultra or Liberty or Dicamba (Engenia/Tavium/ Xtendimax) or Enlist One (2,4-D choline) or Enlist Duo (glyphosate + 2,4-D choline) Residual = Anthem Flexx/Max or Dual or Warrant or Outlook or Zidua Check tank-mix sites first
  3. Metribuzin Products
  4. Metribuzin Tolerant Soybean Cultivars
  5. Soybean Weed Control - 2023 SB-05-23 June 6 48 DAT Tricor 4F @ 8 oz/A + Zidua 4.17SC @ 2.5 oz/A (metribuzin + pyroxasulfone) NTC
  6. Valor in GA Soybeans? Effective, legal and labeled but……. Valor fb Reflex/Prefix/Warrant Ultra is a good weed control program but a bad resistance mgt plan! Unless you hand-weed escapes! Weed control in cotton and peanut without Valor/Reflex?
  7. But would be OK with …… PRE Valor or Envive (Valor + Classic + Harmony) or Surveil (Valor + FirstRate) or Fierce (Valor + Zidua) POST Roundup + Xtendimax/ Engenia + residual (Xtend System) or Liberty + residual (Liberty-Link or XtendFlex System) or Liberty + Enlist One + residual (Enlist System)
  8. Soybean Weed Control - 2023 SB-05-23 June 6 48 DAT NTC
  9. Enlist Soybeans - 2023 NTC SB-04-23 June 6 29 DAT
  10. Dicamba Soybeans Hooded Sprayers **Reduction in downwind buffer from 240 ft to 110 ft
  11. “Old School” Conventional Systems
  12. Weed Control in Conventional Soybeans All depends upon the development and spread of PPO resistance (WSSA/HRAC MOA #14)!
  13. Conventional Soybeans PPO resistant weeds = SOL (really!) Metribuzin – PRE Prowl or Group 15’s Reflex, Cobra, Ultra Blazer, Prefix, Warrant Ultra Classic or FirstRate (sicklepod + MG) STS® (1993) - single gene (non-GMO) Bolt™ (2015) - 2 genes (non-GMO)
  14. Conventional Soybeans - 2023 NTC SB-04-23 June 6 29 DAT
  15. New Stuff? ZALO™ 2.57SL AMVAC glufosinate (2.34 lbs/gal) + quizalofop (0.23 lbs/gal) i.e. Liberty + Assure II 32 oz/A = 0.585 lbs/A glufosinate + 0.0575 lbs/A quizalofop Liberty 2.34SL @ 32 oz/A + Assure II 0.88EC @ 8.4 oz/A Soybean, cotton, LL-canola ProLease™ Technology formulation? degradation/separation/compatibility issues
  16. Weed Control in Soybeans - 2023 SB-06-23 May 30 23 DAT NTC Zalo 2.57SL @ 29 oz/A (glufosinate + quizalofop) Prime Oil @ 1% v/v AMS @ 3 lbs/A
  17. Liberty Ultra 1.76SL BASF Glu-L Technology L-isomer (more active) 25% reduction in rate 24 oz/A vs. 32 oz/A
  18. tolerant to glyphosate, glufosinate, isoxaflutole (Alite™ 27) Alite™ 27 NOT labeled for use GA PPI or PRE 1.5-2.0 oz/A No UGA-OVT variety data I have conducted no research?
  19. Tropical Spiderwort - 2022 TSW-01-22 August 17 22 DAT Roundup PowerMax3 5.88SL @ 25 oz/A Pursuit 2SL @ 4 oz/A Roundup PowerMax3 5.88SL @ 25 oz/A Classic 25DG @ 0.5 oz/A Roundup PowerMax3 5.88SL @ 25 oz/A FirstRate 84WG @ 0.3 oz/A
  20. Other Options??? (Seedbank Mgt.) Seed Mills Integrated Harrington Seed Destructor ~$55,000 Redekop Seed Control ~$70,000 Chaff Lining $5000-$6,000 Blue LED Light Weed Seed Destroyer heat + blue light $30,000 Weed Zapper $69,000-$89,000 Crop Zone Electrophysical weeder + Volt.fuel Cost???????
  21. Double-Cropped Soybean Behind Field Corn What herbicides are safe? Roundup, Liberty, Group 15’s, Atrazine (?) What about the HPPD herbicides? Callisto = 10 months Impact = 9 months Laudis = 8 months Shieldex = 9 months What about south Georgia? Irrigation, sandier soils, low OM less carryover potential (?)
  22. HPPD/Soybean Test - 2023 Planted 92 DAT SB-03-23 September 7 67 DAP
  23. HPPD/Soybean Test - 2023 Planted 92 DAT SB-03-23 October 31
  24. Soybean Yield Response to HPPD Herbicides Applied 92 DBP* - 2023 SB-03-23 Asgrow AG66XF2 PD: July 3 7.5” rows LSD 0.10 = 9.8 -30% -68%
  25. Questions/Comments
  26. Weed Control in Grain Sorghum – 2024 Eric P. Prostko Extension Weed Specialist Seth McAllister, Terrell Co. (October 2022)
  27. Grain Sorghum Weed Control Start clean! Concep treated seed Dual Magnum or Outlook or Warrant (PRE) Atrazine 4L @ 1.5 QT/A (EPOST) Add Huskie if you have ATZ resistance Paraquat (Hooded sprayer) Mechanical Cultivation
  28. A New (er) Product to Consider? Huskie 2.06EC Bayer CropScience Buctril (1.75 lbs/gal) + pyrasulfotole (0.31 lbs/gal) MOA = 6 + 27 Postemergence (13-16 oz/A) 3-leaf to 12” tall sorghum Broadleaf weeds, good on pigweed Tank-mix with atrazine (16 oz/A) Huskie FX = Huskie + Starane
  29. Grain Sorghum Weed Control - 2021 GS-04-21 July 16 58 DAP NTC Warrant @ 48 oz/A Atrazine @ 16 oz/A Huskie @ 16 oz/A Induce @ 0.25% v/v AMS @ 5% v/v Applied 19 DAP
  30. Huskie Injury on Sorghum
  31. Texas Panicum in Grain Sorghum Terrell Co. 08/05/22
  32. New Grain Sorghum Weed Control Technologies (Non-GMO) Igrowth® Alta/UPL ImiFlex (imazamox) PRE/POST DoubleTeam™ S&W/Sorghum Partners/ADAMA FirstAct (quizalofop) POST Inzen™ Pioneer/Corteva Zest (nicosulfuron) POST
  33. Grain Sorghum Weed Control – 2022 I-Growth NTC GS-01-22 August 1 69 DAT (POST)/77 DAT (EPOST) Mocassin II Plus 7.64EC @ 21 oz/A (PRE) fb Imiflex 1AS @ 6 oz/A Agridex @ 1% v/v POST (V7, 9-10” tall, 22 DAP) Imiflex 1AS @ 4 oz/A Agridex @ 1% v/v EPOST (V3, 4” tall, 14 DAP)
  34. Igrowth Grain Sorghum Hybrids
  35. DoubleTeam Sorghum - 2022 GS-01-22 August 1 69 DAT (POST) NTC
  36. DoubleTeam™ System – First Act Off-Types GS-02-21 June 23 9 DAT
  37. DoubleTeam Sorghum Hybrids Disease/lodging issues in 2023?
  38. Inzen Grain Sorghum - 2022 GS-01-22 August 1 69 DAT (POST) NTC Everprex 7.62EC @ 16 oz/A (PRE) fb Zest 75DG @ 0.67 oz/A + Aatrex 4L @ 48 oz/A + Agridex @ 1% v/v (POST)
  39. Questions/Comments? eprostko@uga.edu gaweed.com