Slide Presentation

TITLE    (click title to view slides)
2019 Field Corn Weed Management Update

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

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TABLE OF CONTENTS
  1. 2019 Field Corn Weed Management Update
  2. Valor Tank-Cleaning Problems - 2018
  3. Scanning electron micrograph of a new Goodyear Hose (Black/Versigard Synthetic Rubber)
  4. Field Corn (Pioneer 1794) Yield Response to Valor 51WG (oz/A) - 2015
  5. Halex GT Mixing Problems
  6. Halex GT Mixing Sequence
  7. Liberty on DKC 6208
  8. Field Corn Yield Loss (%) Caused by Uncontrolled Weeds in UGA Weed Science Research Trials (2007-2018). Treated vs. Non-treated
  9. Is Roundup + Atrazine good enough anymore?
  10. Roundup + Atrazine + Prowl - 2018
  11. Roundup (R) + Atrazine (A) + Prowl (P) Effects on Field Corn Yield (16 trials)
  12. Roundup + Atrazine + Laudis - 2018
  13. Field Corn Weed Control - 2018
  14. Impact/Impact Z/Armezon
  15. Impact Z - 2018
  16. Halex GT
  17. Halex GT - 2018
  18. Roundup (R) + Atrazine (A) + Prowl (P) vs. Halex GT (HGT) + Atrazine - Corn Yields
  19. Halex GT (1X) + Atrazine + Induce Applied V2 Stage - 15 DAP
  20. Halex GT (2X) + Atrazine + Induce Applied V2 Stage - 15 DAP
  21. Halex GT (HGT) Effects on Field Corn Yield - 2018
  22. ALS Herbicide Carryover to Field Corn? (Cadre, Staple, Strongarm)
  23. Staple LX @ 1/4X - Pioneer 1739 YHR
  24. Field Corn Hybrid Yield Response to Soil Applied ALS Herbicides - 2018
  25. Revulin Q - 2018 (Accent + Callisto)
  26. Enlist Herbicide Tolerant Corn
  27. Field Corn Weed Control - 2018 / Enlist System (Hybrid: MY13C99 - 217 Bu/A)
  28. Field Corn Lay-By (16 GPA, 30 PSI, 3.7 MPH, Floodjet TK-VS2)
  29. Field Corn Lay-By
  30. Great Herbicide but Crappy Formulation!
  31. Roundup Powermax II @ 32 oz/A + Evik 80DF @ 2 lbs/A - 36 DAT (June 15)
  32. Field Corn Lay-By Test Mitchell Co. - May 11, 2018
  33. Mitchell County Corn Lay-By August 15, 2018 (96 DAT)
  34. Questions/Comments?



SLIDE CONTENTS
  1. Eric P. Prostko Professor/Extension Weed Specialist Dept. Crop & Soil Sciences 2019 Field Corn Weed Management Update
  2. Valor Tank-Cleaning Problems - 2018
  3. Scanning electron micrograph of a new Goodyear Hose (Black/Versigard Synthetic Rubber)
  4. Field Corn (Pioneer 1794) Yield Response to Valor 51WG (oz/A) - 2015 CN-10-15 LSD 0.10 = 16 CV = 4
  5. Halex GT Mixing Problems May 9, 2018 Mixing Sequence Issue Atrazine + Halex GT + Interactive + FoamBuster Interactive should have been first 10 GPA
  6. Halex GT Mixing Sequence
  7. Liberty on DKC 6208 Not 100% trait purity in bag Tolerance is ~4%? Old hybrids = LL on male New hybrids = LL on female
  8. Field Corn Yield Loss (%) Caused by Uncontrolled Weeds in UGA Weed Science Research Trials (2007-2018). Treated vs. Non-treated 200 Bu/A X 0.35 X $3.59 = $251/A
  9. Is Roundup + Atrazine good enough anymore? Roundup + Atrazine +. Laudis Capreno (?) Too hot for GA Impact Z Status (dicamba) + Prowl too? Counter INFR, Crop Rotations???? \ Double-crop soybeans Other options? Liberty, Halex GT, Revulin Q, Enlist????
  10. Roundup + Atrazine + Prowl - 2018 CN-12-18 June 6 70 DAP NTC Roundup Powermax 5.5SL @ 32 oz/A Atrazine 4L @ 64 oz/A Prowl H20 3.8SC @ 32 oz/A Applied 21 DAP
  11. Roundup (R) + Atrazine (A) + Prowl (P) Effects on Field Corn Yield (16 trials) NTC = non-treated check (weedy)
  12. Roundup + Atrazine + Laudis - 2018 CN-06-18 May 16 22 DAT NTC Roundup PowerMax 5.5SL @ 32 oz/A (28 DAP) Atrazine 4L @ 64 oz/A (28 DAP) Laudis 3.5SC @ 3 oz/A (28 DAP)
  13. Field Corn Weed Control - 2018 CN-06-18 May 16 22 DAT NTC Liberty @ 29 oz/A Atrazine @ 64 oz/A Prowl H20 @ 32 oz/A (Applied 28 DAP)
  14. Impact/Impact Z/Armezon POST AMVAC, BASF Topramezone HPPD Need to tank-mix with something Impact Z Includes ATZ 4 lbs/gal
  15. Impact Z - 2018 CN-17-18 June 6 65 DAP NTC Roundup P-MAX @ 32 oz/A Impact Z @ 8 oz/A Prowl H20 @ 32 oz/A Applied 28 DAP
  16. Halex GT Syngenta POST 58 oz/A glyphosate + s-metolachlor + mesotrione Tank-mix with ATZ Will cause bleaching and buggy whipping rate weather Tank-mix order is important
  17. Halex GT - 2018 CN-06-18 May 16 40 DAP NTC Halex GT @ 58 oz/A Atrazine 4L @ 64 oz/A NIS @ 0.25% v/v Applied 28 DAP
  18. Roundup (R) + Atrazine (A) + Prowl (P) vs. Halex GT (HGT) + Atrazine – Corn Yields NTC = non-treated check (weedy)
  19. Halex GT (1X) + Atrazine + Induce Applied V2 Stage – 15 DAP CN-04-18 May 2 21 DAT Pioneer 1870YHR
  20. Halex GT (2X) + Atrazine + Induce Applied V2 Stage – 15 DAP CN-04-18 May 2 21 DAT Pioneer 1870YHR
  21. Halex GT (HGT) Effects on Field Corn Yield - 2018 HSD (P = 0.10) = 56 CV = 12.3 CN-04-18 P1870YHR
  22. ALS Herbicide Carryover to Field Corn? (Cadre, Staple, Strongarm) usually not a problem in GA due to high rainfall/irrigation and sandy/low OM soils Herbicide differences? Hybrid differences? follow label restrictions Carryover looks like nematode damage or fertility issues
  23. Staple LX @ 1/4X – Pioneer 1739 YHR CN-01-18 April 23 26 DAT
  24. Field Corn Hybrid Yield Response to Soil Applied ALS Herbicides - 2018 THSD (P=0.10) = 36 CN-01-18 August 28
  25. Revulin Q – 2018 (Accent + Callisto) CN-06-18 May 16 40 DAP NTC
  26. Enlist™ Herbicide Tolerant Corn tolerance to 2,4-D and Assure + GLY Trait was deregulated in September 2014 and herbicide in October 2014. U.S. launch in 2018 (SE??). Colex-D™ technology 2,4-D choline lower volatility lower drift potential enhanced handling/mixing characteristics reduced odor 1 PRE application + 2 POST applications (30” or V8 stage) Enlist™ Duo DMA-Glyphosate (1.71 lb ae/gal) + 2,4-D choline (1.63 lb ae/gal) Enlist™ One 2,4-D choline (3.8 lb ae/gal) 2,4-D choline
  27. Field Corn Weed Control – 2018 Enlist System (Hybrid: MY13C99 - 217 Bu/A) CN-12-18 June 6 50 DAT NTC Enlist One 3.8SL @ 24 oz/A Roundup P-Max 5.5SL @ 32 oz/A Prowl H2O 3.8SC @ 32 oz/A Applied 21 DAP
  28. Field Corn Lay-By (16 GPA, 30 PSI, 3.7 MPH, Floodjet TK-VS2)
  29. Field Corn Lay-By
  30. Great Herbicide but Crappy Formulation! Product age 20 GPA Pre-slurry STRONG agitation
  31. Roundup Powermax II @ 32 oz/A + Evik 80DF @ 2 lbs/A – 36 DAT (June 15) NTC TREATED 16 GPA 30 PSI 3.7 MPH V7-V8 24” tall FloodJet TK-VS2 7 row middles Treated NTC NTC
  32. Field Corn Lay-By Test Mitchell Co. – May 11, 2018
  33. Mitchell County Corn Lay-By August 15, 2018 (96 DAT) Laudis @ 3 oz/A Broadcast Roundup P-Max @ 22 oz/A Laudis @ 3 oz/A Post-Directed
  34. Questions/Comments?