Slide Presentation

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

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TABLE OF CONTENTS
  1. 2016 Field Corn Weed Management Update
  2. Nematodes and Early Season Herbicide Injury
  3. Nematode Control
  4. Atrazine + Any of these works just fine!
  5. (Atrazine 4L @ 32 oz/A - PRE fb & Roundup WM @ 22 oz/A + Atrazine @ 48 oz/A - Applied 21 DAP
  6. Anthem, Dual, Warrant, Zidua????
  7. PRE Applied Zidua, Dual II Magnum, and Warrant in Field Corn - 2015
  8. Chloroacetamide Injury on Field Corn (Dual, Warrant, Zidua)
  9. Pay Closer Attention to Hybrid/Herbicide Mgt. Guidelines
  10. Something to think about?
  11. Herbicide and High Yield Corn
  12. Herbicide Effects on Field Corn Yield in a High Input Environment
  13. Roundup W-Max + Atrazine + AMS Xtra Timing Effects on Field Corn Yield in a High Input Environment - YEAR 2
  14. Corn Stage of Growth
  15. Valor Drift on Field Corn
  16. Valor Injury - Applied V6
  17. Valor @ 3 oz/A Applied at V5-V6
  18. Field Corn (Pioneer 1794) Yield Response to Valor 51WG (oz/A) - 2015
  19. Morningglory Control in Field Corn
  20. Morningglory Control in Corn
  21. Do we need to rethink laybys????
  22. Do we need to rethink laybys????
  23. New (er) Stuff
  24. Acuron
  25. Acuron - 2015
  26. Revulin Q
  27. Revulin Q - 2015
  28. Enlist™ Herbicide Tolerant Corn
  29. Enlist Duo Recent Problems
  30. Question/Comments



SLIDE CONTENTS
  1. Eric P. Prostko Professor/Extension Weed Specialist Dept. Crop & Soil Sciences 2016 Field Corn Weed Management Update
  2. Nematodes and Early Season Herbicide Injury
  3. Nematode Control Telone II Seed Treatments Avicta Duo Corn Poncho/Votivo Counter - INFR
  4. Atrazine + Any of these works just fine!
  5. (L) - Non-Treated Control; (R) – Atrazine 4L @ 32 oz/A – PRE fb Roundup WM @ 22 oz/A + Atrazine @ 48 oz/A – Applied 21 DAP: Photo @ 33 DAP CN-05-15 May 4 (N83D-3000GT)
  6. Anthem, Dual, Warrant, Zidua????
  7. PRE Applied Zidua, Dual II Magnum, and Warrant in Field Corn - 2015 CN-13-15 May 4 33 DAP NTC Zidua 85WG 1.5 oz/A Dual II Magnum 7.62EC 21 oz/A Warrant 3ME 48 oz/A
  8. Chloroacetamide Injury on Field Corn (Dual, Warrant, Zidua) Rate Planting Depth Hybrid Temperature Moisture
  9. Pay Closer Attention to Hybrid/Herbicide Mgt. Guidelines
  10. Something to think about? Some GA growers are pushing yield limits (250+ Bu/A) 75%-80% irrigated At lower yield/input levels, are herbicide stresses masked by other stresses? At higher yield/input levels (i.e. most stresses are controlled), what about herbicides?
  11. Herbicide and High Yield Corn After 2 years of testing various herbicides applied at recommended time (V2-V5) had no effect on corn yield glyphosate + atrazine applied from V2 to V7 had no effect on corn yield
  12. Herbicide Effects on Field Corn Yield in a High Input Environment (RU = Roundup W-Max, ATZ = Atrazine, PW = Prowl, LIB = Liberty, STDQ = Steadfast Q, CAP = Capreno, LAD = Laudis, HGT = Halex GT, SAN = Sandea) – YEAR 2 CN-01-15 Applied 17 DAP V3 (292 GDD) Pioneer 1197 LSD 0.10 = 28 CV = 7.2
  13. Roundup W-Max (32 oz/A) + Atrazine (48 oz/A) + AMS Xtra (2.5% v/v) Timing Effects on Field Corn Yield in a High Input Environment – YEAR 2 CN-02-15 Pioneer 1197 LSD 0.10 = 14 CV = 3.33
  14. Corn Stage of Growth CN-02-15 April 21 32 DAP V7
  15. Valor Drift on Field Corn
  16. Valor Injury – Applied V6 – 3 DAT 3 oz/A 1.5 oz/A 0.75 oz/A 0.375 oz/A 0.188 oz/A CN-02-14 May 1
  17. Valor @ 3 oz/A Applied at V5-V6 Picture taken 6 DAT - 2015
  18. Field Corn (Pioneer 1794) Yield Response to Valor 51WG (oz/A) - 2015 CN-10-15 LSD 0.10 = 16 CV = 4
  19. Morningglory Control in Field Corn
  20. Morningglory Control in Corn as much atrazine as possible 1.0 lb/A – PRE fb 1.5 lb/A – POST small grain rotations 2,4-D, Clarity, Status, Aim, ET, Evik (PDIR) Enlist Corn??? Liberty-Link® Corn Systems split applications of glyphosate (RR corn) * 1st application + atrazine Harvest Aids Aim Early-harvest
  21. Do we need to rethink laybys???? CN-06-15 July 29 133 DAP NTC Atrazine 4L @ 32 oz/A (PRE) Roundup WM @ 32 oz/A + Atrazine @ 48 oz/A (21 DAP) Atrazine 4L @ 32 oz/A (PRE) Roundup WM @ 32 oz/A + Atrazine @ 48 oz/A (21 DAP) Evik @ 2 lb/A + NIS (37 DAP)
  22. Do we need to rethink laybys???? CN-06-15 July 29 133 DAP NTC Dual II Magnum @ 16 oz/A (PRE) Roundup WM @ 32 oz/A + Atrazine @ 64 oz/A (21 DAP) Dual II Magnum @ 16 oz/A (PRE) Roundup WM @ 32 oz/A + Atrazine @ 64 oz/A (21 DAP) Evik @ 2 lb/A + NIS (37 DAP)
  23. New (er) Stuff
  24. Acuron Syngenta Dual Magnum + Atrazine + Callisto + bycyclopyrone MOA = 5 + 15 + 27 PRE or EPOST 12” tall Soybean, cotton and peanuts = 10 months 80 oz/A Can tank-mix with glyphosate Price???????
  25. Acuron - 2015 NTC Acuron 3.44CS 80 oz/A (PRE) CN-12-15 May 11 47 DAT
  26. Revulin Q DuPont Accent + Callisto + isoxadifen (safener) MOA = 2 + 27 EPOST (20” tall or V6) 3.4-4.0 oz/A Tank mix with atrazine UGA only has 1 year of data????? Cotton or soybean = 10 months; peanut = 18 months No Counter INFR
  27. Revulin Q - 2015 NTC Revulin Q 51.2WG @ 3.4 oz/A COC @ 1% v/v AMS Xtra @ 2.5% v/v (Applied 22 DAP) CN-11-15 May 15 52 DAP
  28. Enlist™ Herbicide Tolerant Corn tolerance to 2,4-D and Assure + GLY Trait was deregulated in September 2014 and herbicide in October 2014 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) 2015 Product Launch IA, IL, IN, OH, SD, WI (first) AR, KS, LA, MN, MO, MS, NE, ND, OK, TN (next) Mycogen/Monsanto/Dekalb license???? 2,4-D choline
  29. Enlist Duo Recent Problems
  30. Question/Comments eprostko@uga.edu www.gaweed.com