Slide Presentation

TITLE    (click title to view slides)
2023 Field Corn Weed Control Update

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

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TABLE OF CONTENTS
  1. 2023 Field Corn Weed Control Update
  2. Field Corn Weed Control Questions for you?
  3. Preplant Burndowns - 2022
  4. Glyphosate Rates
  5. PRE’s in Field Corn?
  6. PRE* Herbicide Effects on Field Corn Yield
  7. Field Corn Weed Control - 2022 With Roundup
  8. Field Corn Weed Control - 2022
  9. Field Corn Weed Control - 2022
  10. Shieldex @ 1.0 oz/A + Roundup P-Max3 @ 22 oz/A + Aatrex @ 32 oz/A + Grounded @ 16 oz/A
  11. Field Corn Weed Control - 2022
  12. Tolpyralate Herbicides for Field Corn
  13. Field Corn Weed Control - 2022
  14. Field Corn Weed Control - 2022
  15. Field Corn Weed Control - 2022
  16. Field Corn Weed Control - 2022
  17. Comparison of Acuron, Acuron Flexi, Acuron GT, and Halex GT
  18. Field Corn Weed Control - 2022 NO Roundup
  19. Field Corn Weed Control - 2022
  20. Field Corn Weed Control - 2022
  21. Field Corn Weed Control - 2022
  22. Field Corn Weed Control - 2022
  23. Field Corn Weed Control - 2022
  24. New(er) Products Being Tested - Not in UGA Pest Control Handbook (yet?)
  25. MG in Field Corn
  26. Field Corn Lay-By (16 GPA, 30 PSI, 3.7 MPH, Floodjet TK-VS2)
  27. Tropical Spiderwort/Benghal Dayflower
  28. Tropical Spiderwort - HPPD’s - 2022
  29. Tropical Spiderwort Control in Field Corn Control with Lay-Bys (8 DAT)
  30. Post-Harvest Control of TSW/BD with 2 Applications (14 d apart) of Gramoxone (paraquat)
  31. Post-Harvest Weed Control Gramoxone 2L @ 3 pts/A + Tricor 4L @ 8 oz/A + NIS @ 0.25% v/v
  32. Post-Harvest Weed Control Gramoxone 2L @ 3 pts/A + Tricor 4L @ 8 oz/A + NIS @ 0.25% v/v
  33. Field Corn Weed Control - Summary
  34. Questions/Comments?



SLIDE CONTENTS
  1. 2023 Field Corn Weed Control Update Eric P. Prostko Extension Weed Specialist Dept. Crop & Soil Sciences
  2. Field Corn Weed Control Questions for you? What technologies are you planting? RR, LL, Conventional, Enlist (2,4-D)? Do you need Counter? Is atrazine still working for you on pigweed? Lets assume it does not What will be planted after the field corn?
  3. Preplant Burndowns - 2022 BN-01-22 (Tift Co.) March 25 30 DAT (Rep 2) NTC Roundup P-MAX3 @ 22 oz/A Aatrex 4L @ 32 oz/A Agridex @ 1% v/v Gramoxone 2SL @ 48 oz/A Aatrex 4L @ 32 oz/A Agridex @ 1% v/v
  4. Glyphosate Rates
  5. PRE’s in Field Corn? CN-04-21 April 18 21 DAT NTC Dual II Magnum 7.64EC 16 oz/A (PRE)
  6. PRE* Herbicide Effects on Field Corn Yield CN-01-22 LSD 0.10 = 6.53 CV = 1.44 *Averaged over 6 POST treatments.
  7. Field Corn Weed Control – 2022 With Roundup
  8. Field Corn Weed Control - 2022 CN-07-22 May 2 35 DAP 11 DAT NTC Roundup P-Max3 @ 22 oz/A Aatrex 4L @ 64 oz/A Prowl H20 3.8SC @ 32 OZ/A Applied 24 DAP
  9. Field Corn Weed Control - 2022 CN-04-22 May 4 14 DAT NTC Shieldex 3.33SC @ 1.0 oz/A Aatrex 4L @ 32 oz/A Roundup P-Max3 5.88SL @ 22 oz/A Applied 23 DAP
  10. Shieldex @ 1.0 oz/A + Roundup P-Max3 @ 22 oz/A + Aatrex @ 32 oz/A + Grounded @ 16 oz/A CN-02-22 May 4 14 DAT
  11. Field Corn Weed Control - 2022 CN-04-22 May 4 14 DAT NTC Empyros 3.82L @ 32 oz/A Aatrex 4L @ 32 oz/A Roundup P-Max3 5.88SL @ 22 oz/A Applied 23 DAP
  12. Tolpyralate Herbicides for Field Corn **All Empyros formulations include a corn safener (benoxacor)
  13. Field Corn Weed Control - 2022 CN-02-22 May 4 14 DAT NTC Laudis 3.5SC @ 3 oz/A Roundup P-Max3 5.88SL @ 22 oz/A Aatrex 4L@ 32 oz/A Grounded @ 16 oz/A Applied 23 DAP
  14. Field Corn Weed Control - 2022 CN-02-22 May 4 14 DAT NTC
  15. Field Corn Weed Control - 2022 CN-02-22 May 4 14 DAT NTC
  16. Field Corn Weed Control - 2022 CN-06-22 June 8 72 DAP NTC Acuron GT 4.295ZC @ 60 oz/A AAtrex 4L @ 32 oz/A Induce @ 0.25% v/v POST (23 DAP)
  17. Comparison of Acuron, Acuron Flexi, Acuron GT, and Halex GT  
  18. Field Corn Weed Control – 2022 NO Roundup
  19. Field Corn Weed Control - 2022 CN-06-22 May 5 15 DAT NTC Impact 2.8SC @ 1.25 oz/A Aatrex 4L @ 32 oz/A Prowl H20 3.8SC @ 32 oz/A Agridex @ 1% v/v Applied 23 DAT
  20. Field Corn Weed Control - 2022 CN-01-22 May 5 38 DAP NTC Revulin Q 51.2DG @ 3.5 oz/A Aatrex 4L @ 64 oz/A Prowl H20 3.8SC @ 32 oz/A Agridex @ 1% v/v Applied 24 DAP
  21. Field Corn Weed Control - 2022 CN-01-22 May 5 38 DAP NTC
  22. Field Corn Weed Control - 2022 CN-01-22 May 5 38 DAP NTC
  23. Field Corn Weed Control - 2022 CN-01-22 May 5 38 DAP NTC
  24. New(er) Products Being Tested Not in UGA Pest Control Handbook (yet?) AMVAC Sinate (glufosinate + topramezone) Impact Core (topramezone + acetochlor) Corteva Kyro (encapsulated acetochlor + topramezone + clopyralid) Resicore (mesotrione + acetochlor + clopyralid) Resicore XL (mesotrione + encapsulated acetochlor + clopyralid) Syngenta Acuron GT (bicyclopyrone + s-metolachlor + mesotrione + glyphosate) Acuron XR (bicyclopyrone + s-metolachlor + mesotrione + atrazine) Helm Katagon (tolpyralate + nicosulfuron) Helmet Maxx (metolachlor + atrazine + mesotrione) Helena Empyros (tolpyralate + s-metolachlor) Empyos Triad (tolpyralate + s-metolachlor + atrazine) Empyros Triad Flex (tolpyralate + s-metolachlor + atrazine) Valent Maverick (mesotrione + pyroxasulfone + clopyralid) Summit Agro Restraint (tolpyralate + acetochlor + dichlormid)
  25. MG in Field Corn
  26. Field Corn Lay-By (16 GPA, 30 PSI, 3.7 MPH, Floodjet TK-VS2)
  27. Tropical Spiderwort/Benghal Dayflower Bury seed! Residuals-Group 15’s Dual Magnum, Outlook, Warrant, Zidua, Anthem Max POST – 2,4-D Directed Aim, Paraquat, Evik Post-Harvest 2,4-D, Aim, Paraquat
  28. Tropical Spiderwort - HPPD’s - 2022 TSW-01-22 August 17 22 DAT Laudis 3.5SC @ 3 oz/A Agridex @ 1% v/v Impact 2.87SC @ 1.25 oz/A Agridex @ 1% v/v Callisto 4SC @ 3 oz/A Agridex @ 1% v/v
  29. Tropical Spiderwort Control in Field Corn Control with Lay-Bys (8 DAT) Untreated Aim 2EC @ 1.5 ozs/A Agrioil @ 1% v/v Gramoxone 3SC @ 1 pt/A 80/20 @ 0.25% v/v Evik 80WP @ 2 lb/A 80/20 @ 0.5% v/v CN-11-04 COMBE:1-6”; 2-7 LF
  30. Post-Harvest Control of TSW/BD with 2 Applications (14 d apart) of Gramoxone (paraquat) CN-01-06 COMBE: 8-10”, flowering 1 week after POST2
  31. Post-Harvest Weed Control Gramoxone 2L @ 3 pts/A + Tricor 4L @ 8 oz/A + NIS @ 0.25% v/v 09/24/21 Day of application
  32. Post-Harvest Weed Control Gramoxone 2L @ 3 pts/A + Tricor 4L @ 8 oz/A + NIS @ 0.25% v/v 10/22/21 28 DAT
  33. Field Corn Weed Control - Summary Start Clean Use a PRE Timely POST (V3-V5) need something else with Roundup + ATZ Lay-By for MG Post-Harvest pigweed dayflower
  34. Questions/Comments? eprostko@uga.edu www.gaweed.com