Slide Presentation

TITLE    (click title to view slides)
2012 Weed Control Update Peanut, Field Corn, Soybean, Grain Sorghum, Canola

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

DOWNLOAD PRESENTATION    (right click and select 'Save Target As...')
• PowerPoint - 31.7 MB
• PDF - 4.2 MB

TABLE OF CONTENTS
  1. 2012 Weed Control Update Peanut, Field Corn, Soybean, Grain Sorghum, Canola
  2. Current Weed Control Programs in GA Are Focused on 1 Weed!
  3. Herbicide-Resistant Palmer Amaranth in GA
  4. Pigweed Control is not impossible!!!!
  5. What one man can do, so can another!
  6. Our Biggest Challenges
  7. Rainfall Totals Cordele, GA
  8. A Question For You
  9. Palmer Amaranth Growth 22 days after starting clean
  10. Activated Residual Herbicides are the key!
  11. PEANUTS
  12. Cotton/Cadre Carryover Problems Worse in 2011?
  13. Cadre/Impose Rotational Restrictions
  14. If growers cannot or will not use Cadre...
  15. "Cadre-Free" Weed Control Programs
  16. Palmer Amaranth Control in Peanut - Valor Program
  17. Palmer Amaranth Control in Peanut - Dual (metolachlor) Program
  18. Classic
  19. A New Formulation of Paraquat from Syngenta
  20. 2012 Peanut Pest Control Rec Changes
  21. Spartan Charge 3.5L
  22. Palmer Amaranth Control in Peanut - Valor vs. Spartan Charge
  23. Sulfentrazone Injury on Peanut - High rates, lighter soils
  24. Potential New Herbicides?
  25. Field Corn
  26. Atrazine 4L @ 2 qts/A + COC @ 1% v/v
  27. Atrazine 4L @ 2 qts/A + COC @ 1% v/v
  28. Future of Atrazine?
  29. Post-Harvest Palmer Amaranth Populations Must be Managed!
  30. Post-Harvest (Corn) Pigweed Problems
  31. Post-Harvest Control of Palmer Amaranth
  32. Post-Harvest Control of Palmer Amaranth
  33. Capreno
  34. Capreno vs. Laudis (51 DAT)
  35. Sometime In The Near Future
  36. Zidua 85WG
  37. Weed Control in Field Corn with Zidua - 2011
  38. Anthem 2.15L
  39. Weed Control in Field Corn with Anthem - 2011
  40. Corvus 2.63SC
  41. Weed Control in Field Corn with Corvus 2.6SC @ 3 oz/A - 2010
  42. Enlist Herbicide Tolerant Corn
  43. SOYBEANS
  44. Herbicides for Pigweed Control in Soybeans
  45. Consider metribuzin on soybean?
  46. Palmer Amaranth Control in Soybeans - 2011
  47. On the Horizon
  48. Zidua 85WG
  49. Palmer Amaranth Control in Soybeans - 2011
  50. Fierce 76WDG
  51. Palmer Amaranth Control with Fierce
  52. Anthem 2.15L
  53. Weed Control in Soybeans with Anthem
  54. Enlist Herbicide Tolerant Soybean
  55. Enlist Soybeans -- 2010 (GA)
  56. Dicamba-Tolerant Soybeans
  57. Grain Sorghum
  58. GRAIN SORGHUM WEED CONTROL
  59. GR-Pigweed Control in Sorghum - Macon County (2010) -- 47 DAP
  60. Reflex/Sorghum (10 month rotation restriction for a good reason!)
  61. Canola
  62. Canola in Georgia
  63. Canola Response to Dual Magnum 7.62EC - 31 DAT
  64. Future Concerns/Issues
  65. Questions/Discussion?



SLIDE CONTENTS
  1. Eric P. Prostko, Ph.D. Professor and Extension Weed Specialist Dept. Crop & Soil Sciences Weed Management Update Peanut, Field Corn, Soybean, Grain Sorghum, Canola (?)
  2. Current Weed Control Programs in GA Are Focused on 1 Weed!
  3. Herbicide-Resistant Palmer Amaranth in GA ALS (2000) Glyphosate (2005) Atrazine (2009) ALS + GLY (2009) DNA + ALS + GLY (2010) ALS + GLY + ATZ (2011)
  4. Pigweed Control is not impossible!!!! Common Reasons for Failure: 1) did not start clean 2) did not use a residual 3) residual did not get activated 4) POST applications are too late 5) short arms and deep pockets
  5. What one man can do, so can another! Sumter County - June 28, 2011 (Prowl + Valor fb Cadre)
  6. Our Biggest Challenges Irrigation/Rainfall Farm Size/Weed Size
  7. Rainfall Totals Cordele, GA inches Month Source: UGA Automated Weather
  8. A Question For You How many acres can be effectively and safely sprayed in 1 day? How many total acres need to be sprayed? What if it rains? What if it is windy?
  9. Palmer Amaranth Growth 22 days after starting clean June 22, 2011 Attapulgus, GA
  10. Activated Residual Herbicides are the key! (Likely will need 2-4 depending upon the crop)
  11. PEANUTS
  12. Cotton/Cadre Carryover Problems Worse in 2011?
  13. Cadre/Impose Rotational Restrictions
  14. If growers cannot or will not use Cadre…... weed control costs will probably be higher purple nutsedge will not be controlled Dual Magnum ($10-14/A) but not as effective. Generic metolachlors are cheaper but may not last as long ($5-6/A). Strongarm + Valor Other POST herbicides (Basagran, Blazer, Cobra, Storm) are effective but have some weaknesses and no residual
  15. “Cadre-Free” Weed Control Programs Program 1 Prowl or Sonalan – PPI/PRE Valor (3 oz/A) + Strongarm (0.23 oz/A) – PRE Cobra or Ultra Blazer + Dual Magnum – POST Program 2 Prowl or Sonalan – PPI/PRE Gramoxone + Storm + Dual Magnum – EPOST Cobra or Ultra Blazer + Dual Magnum – POST 2,4-DB as needed in both programs for sicklepod. Will likely need 2 applications.
  16. Palmer Amaranth Control in Peanut Valor Program PE-26-11 August 25 108 DAP NTC Prowl H20 3.8SC @ 32 oz/A (PRE) Valor 51WG @ 3 oz/A (PRE) Cadre 2AS @ 4 oz/A (POST) COC @ 1% v/v (POST)
  17. Palmer Amaranth Control in Peanut Dual (metolachlor) Program Prowl H20 @ 34 oz/A (2 DAP) Gramoxone Inteon @ 12 oz/A (21 DAP) Storm @ 16 oz/A (21 DAP) Dual Magnum @ 16 oz/A (21 DAP) Cadre @ 4 oz/A (37 DAP) Dual Magnum @ 16 oz/A (37 DAP) PE16B-11 Sept 2 116 DAP NTC
  18. FL-07, GA Greener = No problems GA-06G and Tifguard = 7-11% yield losses
  19. A New Formulation of Paraquat from Syngenta
  20. 2012 Peanut Pest Control Rec Changes
  21. Spartan Charge 3.5L FMC Sulfentrazone (Spartan) @ 3.15 lb/gal + carfentrazone (Aim) @ 0.35 lb/gal PRE @ 3-4 oz/A Tank-mix with Prowl or Dual Not on sands with less than 1% OM Rotation Restrictions: canola = 24 months; field corn = 4 months; cotton = 12 months**; small grains = 4 months; sorghum = 10 months; soybeans = anytime; sunflowers = anytime; tobacco = anytime. Same MOA as Valor (PPO) ** some UGA research suggests that the crop rotation restriction for cotton should be 18 months.
  22. Palmer Amaranth Control in Peanut Valor vs. Spartan Charge PE-26-11 August 25 108 DAP NTC Prowl H20 3.8SC @ 32 oz/A (PRE) Valor 51WG @ 3 oz/A (PRE) Cadre 2AS @ 4 oz/A (POST) COC @ 1% v/v (POST) Prowl H20 3.8SC @ 32 oz/A (PRE) Spartan Charge 3.5L @ 4 oz/A (PRE) Cadre 2AS @ 4 oz/A (POST) COC @ 1% v/v (POST)
  23. Sulfentrazone Injury on Peanut High rates, lighter soils
  24. Potential New Herbicides? Valor + Pyroxasulfone Pyroxasulfone Micro-encapsulated acetochlor
  25. Field Corn For most in GA ……. Atrazine + Glyphosate (RR corn) Ignite (LL corn) Steadfast Q Laudis or Capreno If I was King, I would make you spray 1qt/A Atrazine PRE fb 1.5 qt/A + 1 of the above!
  26. Atrazine 4L @ 2 qts/A + COC @ 1% v/v Applied to 4”-9” Palmer Amaranth (6” average) Photo 13 DAT
  27. Atrazine 4L @ 2 qts/A + COC @ 1% v/v Applied to 4”-9” Palmer Amaranth (6” average) Photo 28 DAT
  28. Future of Atrazine? In April 2010, EPA stated that no additional testing is warranted to address the issue of atrazine and amphibian gonadal development. On May 6, 2011, Save The Frogs petitioned the EPA to ban the use and production of atrazine. Public comments were accepted until November 14, 2011 ??
  29. Post-Harvest Palmer Amaranth Populations Must be Managed!
  30. Post-Harvest (Corn) Pigweed Problems Decreasing daylight hastens flower and seed production Flowering (3-4 weeks) Seed production (2-3 weeks) Some germination at 410F (8%) Control Options Mowing/Tillage (>6” weeds) Herbicides (<6” weeds) No small grain Gramoxone + Dual Magnum or Warrant (?) Small Grain planted soon Gramoxone + 2,4-D or dicamba When can we stop worrying about seed production? Keeley et al. 1987. Weed Science 35:199-204 Steckel et al., 2004. Weed Science 52:217-221
  31. Post-Harvest Control of Palmer Amaranth (6” average: 2”-17” range at application) CN-01B-11 September 15 30 DAT NTC Gramoxone Inteon 2SL @ 3 pt/A 2,4-D Amine 3.8SL @ 1 pt/A Primary @ 1% v/v Gramoxone Inteon 2SL @ 3 pt/A Clarity 4SL @ 8 oz/A Primary @ 1% v/v
  32. Post-Harvest Control of Palmer Amaranth (6” average: 2”-17” range at application) CN-01B-11 September 15 30 DAT NTC Gramoxone Inteon 2SL @ 3 pt/A Dual Magnum 7.62EC @ 16 oz/A Primary @ 1% v/v Gramoxone Inteon 2SL @ 3 pt/A Warrant 3ME @ 48 oz/A Primary @ 1% v/v
  33. Capreno Bayer CropScience Thiencarbazone-methyl (0.57 lb/gal) (MOA = 2) Tembotrione (2.88 lbs/gal) (MOA = 27) Laudis Isoxadifen (crop safener) 3.45 SC formulation POST corn OT Up until V1-V6; PDIR – V7 3 oz/A of Capreno 2.5 oz/A Laudis, normal rate is 3 oz/A COC + AMS or UAN OP/ALS Soil Interaction Rotation Restrictions Corn = 0 months; wheat = 4 months; cotton, soybean, sorghum = 10 months; peanut = 12 months; canola, tobacco = 18 months Tank-Mixes Atrazine, Ignite, Glyphosate
  34. Capreno vs. Laudis (51 DAT) NTC Capreno 3.45SC @ 3 oz/A MSO @ 1% v/v AMS Xtra @ 2.5% v/v Laudis 3.5SC @ 3 oz/A MSO @ 1% v/v AMS Xtra @ 2.5% v/v CN-14-10 Applied 19 DAP
  35. Sometime In The Near Future
  36. Zidua 85WG Pyroxasulfone Residual control of annual grasses and certain broadleaf weeds including pigweed Same MOA as Dual or Warrant but used at lower rates Use rate: 1-2 oz/A
  37. Weed Control in Field Corn with Zidua - 2011 CN-11-11 May 11 47 DAT NTC Zidua 85WG @ 2 oz/A (PRE)
  38. Anthem 2.15L Cadet (0.0632 lb/gal) + Pyroxasulfone (2.0868 lb/gal) Residual control of annual grasses and certain broadleaf weeds including pigweed Use rate: 3.5-7.0 oz/A (?)
  39. Weed Control in Field Corn with Anthem - 2011 CN-14-11 June 6 60 DAP NTC Anthem 2.15SL @ 5 oz/A (EPOST) Roundup W-Max 5.5SL @ 22 oz/A (EPOST) Roundup W-Max 5.5SL @ 22 oz/A (MPOST)
  40. Corvus 2.63SC 3.33 oz/A PRE or EPOST (V2) Tank-Mixtures Atrazine, Ignite, Glyphosate No adjuvants needed 0.75 lbs/gal - thiencarbazone (MOA = 2) 1.88 lbs/gal - isoxaflutole (MOA = 27) Balance Flexx 1.25 lbs/gal - cyprosulfamide (safener) ALS/OP Interaction Problem Rotations Field corn = 0 months; soybean = 9 months; cotton = 10 months; peanut = 12 months; canola, sorghum, tobacco = 17 months
  41. Weed Control in Field Corn with Corvus 2.6SC @ 3 oz/A - 2010 NTC PRE (0 DAP) EPOST (13 DAP) CN-02-10 May 11, 2010 47 DAP
  42. Enlist™ Herbicide Tolerant Corn tolerance to 2,4-D and Assure Colex-D™ technology 2,4-D choline lower volatility lower drift potential enhanced handling/mixing characteristics reduced odor 1 PRE application + 2 POST applications (V8 stage) Enlist™ Duo DMA-Glyphosate (1.71 lb ae/gal) + 2,4-D choline (1.63 lb ae/gal) 3.5 pt/A 2013 Product Launch
  43. SOYBEANS
  44. Herbicides for Pigweed Control in Soybeans Residual Herbicides Authority MTZ, Authority XL, Canopy/Cloak, Boundary, Valor, Valor XLT, Prefix, Dual Magnum/Generics, Tricor, Prowl, Intrro, Treflan, Envive, Warrant Postemergence Reflex/Dawn, Prefix, Cobra, Ultra Blazer, Flexstar GT, Harmony (ALS?), Ignite (LL soybeans)
  45. Consider metribuzin on soybean? Not a PPO Not a PPO Good on pigweed Can be applied PPI Issues soil texture, OM, pH Varieties Rotations Company support Lack of incentive at dealer level Cost/A TriCor 75DF Metribuzin 75DF *Canopy price reduction for 2012
  46. Palmer Amaranth Control in Soybeans - 2011 SB-13-2011 June 23, 2011 30 DAP NTC Boundary 6.5EC @ 1.5 pt/A
  47. On the Horizon Zidua Anthem Fierce Enlist Soybean Enhanced tolerance to 2,4-D Stacked with glyphosate 2015? Dicamba Resistant Soybeans Monsanto/BASF Stacked with glyphosate 2013?
  48. Zidua 85WG Pyroxasulfone Residual control of annual grasses and certain broadleaf weeds including pigweed Same MOA as Dual or Warrant but used at lower rates Use rate: 1-2 oz/A
  49. Palmer Amaranth Control in Soybeans - 2011 SB-13-2011 June 23, 2011 30 DAP NTC Zidua 85WG @ 2 oz/A
  50. Fierce 76WDG February 2012 (?) Valor (33.5%) + Pyroxasulfone (42.5%) preplant or preemergence 3 oz/A on coarse soils (Valor @ 2 oz/A + Pyrox @ 1.5 oz/A)
  51. Palmer Amaranth Control with Fierce NTC Fierce 76WG @ 3 oz/A SB-14-10 July 22, 2010 50 DAT
  52. Anthem 2.15L Cadet (0.0632 lb/gal) + Pyroxasulfone (2.0868 lb/gal) Residual control of annual grasses and certain broadleaf weeds including pigweed Use rate: 3.5-7.0 oz/A (?)
  53. Weed Control in Soybeans with Anthem SB-18-11 June 24 65 DAP NTC Anthem 2.15SL @ 8 oz/A – PRE Roundup W-Max 5.5SL @ 22 oz/A - POST
  54. Enlist™ Herbicide Tolerant Soybean tolerance to 2,4-D + glyphosate + glufosinate (Ignite) Colex-D™ technology 2,4-D choline lower volatility lower drift potential enhanced handling/mixing characteristics reduced odor 1 Burndown/PRE application + 2 POST applications (R2 stage) Enlist™ Duo DMA-Glyphosate (1.71 lb ae/gal) + 2,4-D choline (1.63 lb ae/gal) 3.5 pt/A 2015 Product Launch
  55. Enlist Soybeans – 2010 (GA) SB-09-10 June 28 NTC Ignite 280 2.34SL @ 22 oz/A Weedar 64 4SL @ 17 oz/A N-Pack AMS @ 2.5% v/v Applied May 28 and June 18
  57. Grain Sorghum
  58. GRAIN SORGHUM WEED CONTROL Concep treated seed Dual Magnum or Intrro/Micro-Tech or Warrant (PRE) Atrazine (POST) Paraquat (Hooded sprayer)
  59. GR-Pigweed Control in Sorghum Macon County (2010) – 47 DAP NTC Concep Treated Seed Dual Magnum 7.62EC @ 1 pt/A (PRE) Atrazine 4L @ 1.5 qt/A + COC @ 1% v/v (16 DAP) SG-01-10 JUNE 7
  60. Reflex/Sorghum (10 month rotation restriction for a good reason!)
  61. Canola Howard F. Schwartz, Colorado State University, Bugwood.org
  62. Canola in Georgia ~25,000 acres Buyers AgStrong Bowersville (Hart Co.) Moore’s Resaca (Gordon Co.) Needs A PRE herbicide to control henbit and ryegrass Howard F. Schwartz, Colorado State University, Bugwood.org
  63. Canola Response to Dual Magnum 7.62EC - 31 DAT NTC 3.6 oz/A (low rate) 14.4 oz/A (high rate) ** Dual Magnum is not yet labeled for use in canola grown in GA. Research is underway to evaluate crop and weed response.
  64. Future Concerns/Issues Abuse of Ignite Increased use of Dual Magnum and Warrant Increased use of PPO herbicides Valor and Reflex
  65. Questions/Discussion? www.gaweed.com 229-392-1034 (cell)