Slide Presentation

TITLE    (click title to view slides)
2022 Soybean/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. 2022 Soybean Weed Control Update
  2. Soybean Weed Control Simplified
  3. Metribuzin Products
  4. "Old School"
  5. Conventional Soybeans
  6. Soybean Weed Control - 2021
  7. Soybean Weed Control - 2021
  8. Reflex @ 24 oz/A + Classic @ 0.5 oz/A + 2,4-DB @ 2 oz/A - Applied 17 DAP (V2)
  9. Classic 25DG @ 0.67 oz/A + NIS Injury on Non-STS Soybeans
  10. PPO Injury on Soybean
  11. Valor in GA Soybeans?
  12. Liberty-Link® Soybeans
  13. Soybean Weed Control - 2021
  14. LibertyLink GT27™
  15. Enlist™ Soybeans
  16. Enlist™ Soybean Varieties UGA-OVT
  17. Xtend®/XtendFlex® Soybeans
  18. Soybean Weed Control - 2021
  19. GA Endangered Species Concerns for DT Soybeans
  20. Hooded Sprayer Reduces Downwind Dicamba Buffer Requirement (240’ to 110’ and 310’ to 240’)
  21. Dicamba Soybeans DRA, VRA, pH Buffers
  22. What happens to pH?
  23. Questions/Comments
  24. GRAIN SORGHUM WEED CONTROL UPDATE - 2022
  25. Grain Sorghum Weed Control
  26. Conventional Sorghum Weed Control System - 2021
  27. A New (er) Product to Consider?
  28. Grain Sorghum Weed Control - 2021
  29. Huskie Injury on Sorghum
  30. New Grain Sorghum Weed Control Technologies (Non-GMO)
  31. Igrowth™ System - 2021
  32. DoubleTeam™ System - 2021
  33. DoubleTeam™ System - First Act Off-Types
  34. Inzen™ System - 2021
  35. Questions/Comments?



SLIDE CONTENTS
  1. 2022 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. “Old School”
  5. 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)
  6. Soybean Weed Control - 2021 SB-01-21 May 18 29 DAP NTC Metribuzin @ 0.25 lb ai/A + WSSA Group 15 (PRE)
  7. Soybean Weed Control - 2021 SB-04-21 July 19 53 DAP NTC Reflex 2SL @ 24 oz/A Classic 25DG @ 0.5 oz/A 2,4-DB 2SL @ 2 oz/A Induce @ 0.25% v/v Applied 17 DAP
  8. Reflex @ 24 oz/A + Classic @ 0.5 oz/A + 2,4-DB @ 2 oz/A - Applied 17 DAP (V2) SB-04-21 June 16 30 DAP
  9. Classic 25DG @ 0.67 oz/A + NIS Injury on Non-STS Soybeans WT-01-21 July 19 6 DAT
  10. PPO Injury on Soybean
  11. Valor in GA Soybeans? Effective, legal and labeled but……. Are you worried about PPO resistance? 13 species worldwide 4 species in US 1 species in GA Weed control in cotton and peanut without Valor? Valor fb Reflex/Prefix is a good weed control program but a bad resistance mgt plan!
  12. Liberty-Link® Soybeans Liberty 2.34SL @ 32-43 oz/A or generics VE-R1 (beginning bloom) 2 applications (5 days apart) (87 oz/A/year total) Tank-mixes with POST grass herbicides may reduce grass control Assure (10-21%); Fusilade (8-12%); Poast (25-41%); Select (4-22%) Residuals still needed 15 GPA, medium-coarse droplet size, small weeds, 9 am - 6 pm
  13. Soybean Weed Control - 2021 SB-04-21 July 19 53 DAP NTC Liberty + Zidua Liberty + Outlook Liberty + Dual Magnum Liberty + Warrant Roundup P-Max Applied 17 DAP Liberty @ 32 oz/A Zidua 4.17SL @ 2.5 oz/A Outlook @ 12.8 oz/A Dual Magnum @ 16 oz/A Warrant @ 48 oz/A Roundup P-Max @ 32 oz/A
  14. tolerant to glyphosate, glufosinate, isoxaflutole (Alite™ 27) Alite™ 27 Only labeled for use in these GA counties: Atkinson, Berrien, Clinch, Echols, Evans, Lanier, Lowndes PPI or PRE 1.5-2.0 oz/A No UGA-OVT variety data
  15. Enlist™ Soybeans China approval in Jan 2019 Enlist One® 2,4-D choline Enlist Duo® 2,4-D choline + glyphosate POST up to R2 (full bloom) 2 apps (12 days) Enlist One can be tank-mixed with glufosinate (Liberty) Check label/web-sites for restrictions (nozzles, wind speed, buffers, etc.) Varieties for GA????
  16. Enlist™ Soybean Varieties UGA-OVT 2020 Tests (6 varieties) DM48E73 (+), DM59E01 (+), DM51E01 (=), AGS48E19 (+), AGS51E19 (-), MS4800E (+), MS5110E (-) 2021 Tests (4 varieties) +/- = equal or above or below Maturity Group statewide average yield ~20% of US market in 2020 ~35% of US market in 2021
  17. Xtend®/XtendFlex® Soybeans Xtendimax® 2.9SL, Engenia® 5SL Dicamba POST up to R1 (beginning bloom) or June 30 2 apps (7 days) Add a residual Tavium® 3.38SC dicamba (1.12 ae) + s-metolachlor (2.26 lb) 56.5 oz/A POST up to V4 or June 30 1 PPLNT/PRE + 1 POST tank-mixes Check Xtendimax label/web-sites for tank-mixes and restrictions (nozzles, wind speed, buffers, etc.) Engenia information Photo: Dr. Shaun Casteel, Purdue Univ.
  18. Soybean Weed Control - 2021 SB-04-21 July 19 53 DAP Applied 17 DAP Engenia @ 12.8 oz/A Zidua 4.17SL @ 2.5 oz/A Tavium @ 56.5 oz/A Xtendimax @ 22 oz/A Warrant @ 48 oz/A Roundup P-Max @ 32 oz/A + Sentris @ 8 oz/A Induce @ 0.25% v/v Engenia + Zidua + Roundup P-Max Tavium + Roundup P-Max Xtendimax + Warrant + Roundup P-Max
  19. GA Endangered Species Concerns for DT Soybeans 310’ downwind buffer 57’ omni buffer South Burke Seminole Decatur Mitchell Worth North Floyd Bartow Gordon Walker
  20. Hooded Sprayer Reduces Downwind Dicamba Buffer Requirement (240’ to 110’ and 310’ to 240’) Redball 642 642E 645 645T ATV642 SP645 SPK645 642E 645
  21. Dicamba Soybeans DRA, VRA, pH Buffers Drift Reduction Adjuvant (DRA) Volatility Reduction Adjuvant (VRA) VaporGrip® Xtra Agent potassium hydroxide/ethanoic acid pH Buffering Adjuvant Sentris™(BASF) potassium carbonate Glyphosate + Engenia + Sentris Issues?? - gas pressure buildup/foaming - mixing order issues
  22. What happens to pH?
  23. Questions/Comments
  24. GRAIN SORGHUM WEED CONTROL UPDATE - 2022 Eric P. Prostko, Ph.D. Professor/Extension Weed Specialist Dept. Crop & Soil Sciences
  25. 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
  26. Conventional Sorghum Weed Control System - 2021 GS-02-21 July 16 58 DAP NTC Mocassin II Plus @ 16 oz/A (PRE) Atrazine 4L @ 48 oz/A (26 DAP) Prowl H2O @ 32 oz/A (26 DAP) Agridex @ 1% v/v (26 DAP)
  27. 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
  28. 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
  29. Huskie Injury on Sorghum
  30. New Grain Sorghum Weed Control Technologies (Non-GMO) Igrowth™ Alta/UPL ImiFlex (imazamox) PRE/POST DoubleTeam™ S&W Seed Partners/ADAMA FirstAct (quizalofop) POST Maybe cultivars??? S&W Seeds SP58M85DT/SP45A45DT Inzen™ Pioneer/Corteva Zest (nicosulfuron) POST
  31. Igrowth™ System - 2021 GS-02-21 July 16 58 DAP Mocassin II Plus @ 16 oz/A (PRE) ImiFlex 1SL @ 6 oz/A (14 DAP) Agridex @ 1% v/v (14 DAP NTC
  32. DoubleTeam™ System - 2021 GS-02-21 July 16 58 DAP Dual II Magnum 7.64EC @ 16 oz/A (PRE) FirstAct 0.88EC @ 10 oz/A Agridex @ 1% v/v Applied 26 DAP NTC
  33. DoubleTeam™ System – First Act Off-Types GS-02-21 June 23 9 DAT
  34. Inzen™ System - 2021 GS-02-21 July 16 58 DAP Everprex 7.62EC @ 16 oz/A (PRE) Zest 75WG @ 0.67 oz/A Agridex @ 1% v/v AMSOL @ 2.5% v/v Applied 26 DAP NTC
  35. Questions/Comments? eprostko@uga.edu gaweed.com