Slide Presentation

TITLE    (click title to view slides)
Peanut Weed Control Update - 2021

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

DOWNLOAD PRESENTATION    (right click and select 'Save Target As...')
• PowerPoint - 14.7 MB
• PDF - 8.9 MB

TABLE OF CONTENTS
  1. Peanut Weed Control Update - 2021
  2. Peanut Weed Control Integrated Program Approach
  3. Peanut Weed Control - 2020 Program Approach
  4. Prowl vs. Sonalan??
  5. Peanut Weed Control - 2020 Sonalan or Prowl?
  6. Peanut Weed Control - 2020 Gramoxone Program
  7. Peanut Weed Control - 2020 Do you really need a 'cracking' spray?
  8. Wrong Mixing Order
  9. WSSA Group 15 Herbicides?
  10. WSSA Group 15's in Peanut How much?
  11. Peanut Weed Control - 2020 Dual Magnum/Cadre Programs
  12. Peanut Weed Control - 2020 Outlook/Cadre Programs
  13. Peanut Weed Control - 2020 Warrant/Cadre Programs
  14. Peanut Weed Control - 2020 Zidua/Cadre Programs
  15. Peanut Weed Control - 2020 Anthem Flex/Cadre Programs
  16. Peanut Yield (lbs/A) Response to WSSA Group 15-s - 2020
  17. Cobra vs. Blazer
  18. Ultra Blazer or Cobra - 2020 15 GPA, AIXR
  19. Ultra Blazer or Cobra - 2020 15 GPA, AIXR Tips
  20. Strip-Tillage Peanut Weed Control
  21. Other Research
  22. Wild Radish Seedlings
  23. Strongarm 84WG @ 0.3 oz/A + Induce @ 0.25% v/v on Large Wild Radish (20" flowering/pods) - 6 DAT (June 8 )
  24. Strongarm 84WG @ 0.3 oz/A + Induce @ 0.25% v/v on Large Wild Radish (20" flowering/pods) - 20 DAT (June 22)
  25. Nozzle Type and Off-Target Movement (JD4630, 90’ boom, 15" nozzle spacing, 13 GPA, 13.6 MPH, 41 PSI)
  26. Nozzle Type Effects on Insect, Disease, and Yield of Peanut with a Commercial Sprayer - 2020
  27. Influence of Boom Height on Spray Coverage - 2020
  28. Glyphosate in Soils
  29. Peanut Response to Glyphosate - 44 DAP
  30. Peanut Response to Glyphosate - 64 DAP
  31. Peanut Response to Glyphosate - 79 DAP
  32. Peanut Response to Glyphosate - 105 DAP
  33. Peanut Yield As Influenced by Soil Applied Glyphosate
  34. Is this glyphosate? No, it's diuron!
  35. Peanut Yield Loss from Diuron 4L (2019-2020).
  36. Preplant Liberty (glufosinate) for Peanut?
  37. Peanut Response to Liberty - 30 DAP
  38. Peanut Response to Liberty - 55 DAP
  39. Peanut Response to Liberty - 86 DAP
  40. Peanut Response to Liberty - 118 DAP
  41. Liberty Timing and Rate Effects on Peanut Yield (lbs/A)
  42. Future Products?
  43. Weed Control in Peanut with Brake - 2020
  44. Weed Control in Peanut with Trifludimoxazin - 2020
  45. Hairy Indigo in Peanut - 2020
  46. Hairy Indigo Control with Cobra (12.5 oz/A) + 2,4-DB (16 oz/A) + Agridex (1% v/v)
  47. Hairy Indigo Control with Classic @ 0.5 oz/A + NIS (15 DAT)
  48. Questions/Comments?



SLIDE CONTENTS
  1. Peanut Weed Control Update - 2021 Eric P. Prostko, Ph.D. Professor/Extension Weed Specialist Department of Crop & Soil Sciences
  2. Peanut Weed Control Integrated Program Approach Tillage Rye Cover Crop Twin Rows Herbicides Hand-Weeding Irrigation
  3. Peanut Weed Control – 2020 Program Approach PE-05-20 July 21 71 DAP NTC NTC Prowl H20 @ 32 oz/A (PRE) Valor EZ @ 3 oz/A (PRE) Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A (29 DAP) Warrant @ 48 oz/A (29 DAP) 2,4-DB @ 16 oz/A (29 DAP) Induce @ 0.25% v/v (29 DAP) Started CLEAN! Twin Rows 4 residuals Timely POST
  4. Prowl vs. Sonalan??
  5. Peanut Weed Control – 2020 Sonalan or Prowl? PE-11-20 August 3 84 DAP NTC Prowl H20 @ 32 oz/A + Valor SX @ 3 oz/A (PRE) Cadre @ 4 oz/A + Dual Magnum @ 16 oz/A + 2,4-D @ 16 oz/A (30 DAP) Sonalan @ 32 oz/A + Valor SX @ 3 oz/A (PRE) Cadre 4 oz/A + Dual Magnum @ 16 oz/A + 2,4-DB @ 16 oz/A (30 DAP)
  6. Peanut Weed Control – 2020 Gramoxone Program PE-05-20 June 18 38 DAP NTC Prowl H20 3.8ASC @ 32 oz/A (PRE) Gramoxone 3SL @ 8 oz/A (14 DAP) Storm 4SL @ 16 oz/A (14 DAP) Dual Magnum 7.62EC @ 16 oz/A (14 DAP) Cadre 2AS @ 4 oz/A (29 DAP) Dual Magnum 7.62EC @ 16 oz/A (29 DAP) 2,4-DB 1.75SL @ 16 oz/A (29 DAP)
  7. Peanut Weed Control – 2020 Do you really need a “cracking” spray? PE-13-20 June 3 22 DAP NTC Prowl H20 @ 32 oz/A Valor EZ @ 3 oz/A Strongarm @ 0.225 oz/A (PRE)
  8. Wrong Mixing Order Was: 1) Gramoxone; 2) Storm; 3) Zidua SC Should have been: 1) Zidua SC; 2) Storm; 3) Gramoxone June 11, 2020
  9. WSSA Group 15 Herbicides?
  10. WSSA Group 15’s in Peanut How much?
  11. Peanut Weed Control – 2020 Dual Magnum/Cadre Programs PE-05-20 August 20 101 DAP NTC Prowl H20 @ 32 oz/A (PRE) Gramoxone 3SL @ 8 oz/A + Storm @ 16 oz/A + Dual Magnum @ 16 oz/A (14 DAP) Cadre @ 4 oz/A + Dual Magnum @ 16 oz/A + 2,4-DB @ 16 oz/A (29 DAP) Prowl H20 @ 32 oz/A + Valor EZ @ 3 oz/A + Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A + Dual Magnum @ 16 oz/A + 2,4-DB @ 16 oz/A (29 DAP)
  12. Peanut Weed Control – 2020 Outlook/Cadre Programs PE-05-20 August 20 101 DAP NTC Prowl H20 @ 32 oz/A (PRE) Gramoxone 3SL @ 8 oz/A + Storm @ 16 oz/A + Outlook @ 10.5 oz/A (14 DAP) Cadre @ 4 oz/A + Outlook @ 10.5 oz/A + 2,4-DB @ 16 oz/A (29 DAP) Prowl H20 @ 32 oz/A + Valor EZ @ 3 oz/A + Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A + Outlook @ 12.8 oz/A + 2,4-DB @ 16 oz/A (29 DAP)
  13. Peanut Weed Control – 2020 Warrant/Cadre Programs PE-05-20 August 20 101 DAP NTC Prowl H20 @ 32 oz/A (PRE) Gramoxone 3SL @ 8 oz/A + Storm @ 16 oz/A + Warrant @ 48 oz/A + Induce @ 0.25% v/v (14 DAP) Cadre @ 4 oz/A + Warrant @ 48 oz/A + 2,4-DB @ 16 oz/A Induce @ 0.25% v/v (29 DAP) Prowl H20 @ 32 oz/A + Valor EZ @ 3 oz/A + Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A + Warrant @ 48 oz/A + 2,4-DB @ 16 oz/A + Induce @ 0.25% v/v (29 DAP)
  14. Peanut Weed Control – 2020 Zidua/Cadre Programs PE-05-20 August 20 101 DAP NTC Prowl H20 @ 32 oz/A (PRE) Gramoxone 3SL @ 8 oz/A + Storm @ 16 oz/A + Zidua SC @ 2.5 oz/A + Induce @ 0.25% v/v (14 DAP) Cadre @ 4 oz/A + Zidua SC @ 2.5 oz/A + 2,4-DB @ 16 oz/A Induce @ 0.25% v/v (29 DAP) Prowl H20 @ 32 oz/A + Valor EZ @ 3 oz/A + Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A + Zidua SC @ 2.5 oz/A + 2,4-DB @ 16 oz/A + Induce @ 0.25% v/v (29 DAP)
  15. Peanut Weed Control – 2020 Anthem Flex/Cadre Programs PE-05-20 August 20 101 DAP NTC Prowl H20 @ 32 oz/A (PRE) Gramoxone 3SL @ 8 oz/A + Storm @ 16 oz/A + Anthem Flex @ 3 oz/A + Induce @ 0.25% v/v (14 DAP) Cadre @ 4 oz/A + Anthem Flex @ 3 oz/A + 2,4-DB @ 16 oz/A Induce @ 0.25% v/v (29 DAP) Prowl H20 @ 32 oz/A + Valor EZ @ 3 oz/A + Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A + Anthem Flex @ 3 oz/A + 2,4-DB @ 16 oz/A + Induce @ 0.25% v/v (29 DAP)
  16. Peanut Yield (lbs/A) Response to WSSA Group 15’s - 2020 PE-18-20 GA-06G Weed-free P = 0.6901 CV = 7.26 DM @ 15 oz/A W @ 43 oz/A DM (PRE + 15 + 29 DAP) W (42 + 56 DAP)
  17. Cobra vs. Blazer
  18. Ultra Blazer or Cobra – 2020 15 GPA, AIXR 2”-10” tall AMAPA 13 DAT June 17
  19. Ultra Blazer or Cobra – 2020 15 GPA, AIXR Tips 2”-10” tall AMAPA 25 DAT June 29 NTC
  20. Strip-Tillage Peanut Weed Control Commercial Field Tift Co. July 19, 2020 56 DAP 1) cereal rye planted Dec 18, 2019 (70 lbs/A) – broadcast 2) 45 lbs/A N on Jan 22, 2020 3) Burndown on March 30 - Roundup + Valor (2 oz/A) 4) strip-till rig on April 29 5) Planted May 25 - Twin row 6) Gramoxone + Prowl + Valor + Strongarm at planting 7) Cadre + Dual Magnum + 2,4-DB (~40 DAP) 8) hard-hose irrigation
  21. Other Research
  22. Wild Radish Seedlings July 7, 2020 Ponder Farm
  23. Strongarm 84WG @ 0.3 oz/A + Induce @ 0.25% v/v on Large Wild Radish (20” flowering/pods) – 6 DAT (June 8 ) 11002AIXR Tips 15 GPA
  24. Strongarm 84WG @ 0.3 oz/A + Induce @ 0.25% v/v on Large Wild Radish (20” flowering/pods) – 20 DAT (June 22 ) 11002AIXR Tips 15 GPA untreated treated
  25. Nozzle Type and Off-Target Movement (JD4630, 90’ boom, 15” nozzle spacing, 13 GPA, 13.6 MPH, 41 PSI) NZ-01-20 August 25 116 DAP Bulloch Co. TTI-11004 TTI60-11004 XRC-11004
  26. Nozzle Type Effects on Insect, Disease, and Yield of Peanut with a Commercial Sprayer – 2020* *JD4630, 90’ boom, 15” nozzle spacing, 13.6 MPH, 13 GPA, 41 PSI NZ-01-20 Bulloch Co.
  27. Influence of Boom Height on Spray Coverage - 2020 RoGator 700B TTJ60-03 nozzle 15 GPA 5 MPH June 29
  28. Glyphosate in Soils* Average ½ life in soils is about 30 days with range of 5.7 to 40.9 days. Once in the soil, glyphosate is bound tightly by mostly non-organic soil components, particularly charged minerals such as aluminum and iron oxides (Borggaard and Gimsing 2008). Glyphosate is more tightly bound to soils than most other herbicides and competes for adsorption sites in soil with phosphate, so phosphate fertilizers can cause remobilization of glyphosate (Bott et al. 2011). In extreme cases, this phenomenon can result in phytotoxicity to plants from unbound glyphosate (greenhouse-soybean). Also, in very sandy soils without enough binding sites, glyphosate residues can cause phytotoxicity (Cornish 1992). (tomato transplants) *Source: Duke, S.O. 2020. Glyphosate: environmental fate and impact. Weed Science 68:201-207
  29. Peanut Response to Glyphosate PE-16-20 June 17 44 DAP NTC Roundup P-Max II 5.5SL 160 oz/A Applied 1 DAP
  30. Peanut Response to Glyphosate PE-16-20 July 7 64 DAP NTC Roundup P-Max II 5.5SL 160 oz/A Applied 1 DAP
  31. Peanut Response to Glyphosate PE-16-20 July 22 79 DAP NTC Roundup P-Max II 5.5SL 160 oz/A Applied 1 DAP
  32. Peanut Response to Glyphosate PE-16-20 August 17 105 DAP NTC Roundup P-Max II 5.5SL 160 oz/A Applied 1 DAP
  33. Peanut Yield As Influenced by Soil Applied Glyphosate* PE-16-20 *Averaged over 2 timings (PPLNT - 6 DBP and PRE – 1 DAP) P = 0.4057 CV = 4.8 Roundup P-MAX II 5.5SL (oz/A)
  34. Is this glyphosate? No, it’s diuron! 5900+ lbs/A Planting Date: April 20 Sprayed: June 7 Picture: June 20 Tift Co. 2018
  35. Peanut Yield Loss from Diuron 4L (2019-2020). Tukey-Kramer (P=0.10)
  36. Preplant Liberty (glufosinate) for Peanut? Why? used extensively in GA cotton so its around the farm and growers are very familiar with it. Could be helpful for horseweed, morningglory, and pigweed control prior to planting Peanut control for replant prevent off-label usage Current labeled rotation = 180 days
  37. Peanut Response to Liberty PE-21-20 June 25 30 DAP No Liberty Liberty @ 64 oz/A 7 DBP + 1 DAP
  38. Peanut Response to Liberty PE-21-20 July 20 55 DAP No Liberty Liberty @ 64 oz/A 7 DBP + 1 DAP
  39. Peanut Response to Liberty PE-21-20 August 20 86 DAP No Liberty Liberty @ 64 oz/A 7 DBP + 1 DAP
  40. Peanut Response to Liberty PE-21-20 September 21 118 DAP No Liberty Liberty @ 64 oz/A 7 DBP + 1 DAP
  41. Liberty Timing and Rate Effects on Peanut Yield (lbs/A) PE-21-20 Time of Application P = 0.5675 CV = 6.4 Liberty 2.34SL Rate (oz/A) P = 0.2322 CV = 4.5
  42. Future Products? Brake fluridone SePRO WSSA #12 Vulcarus trifludimoxazin BASF WSSA #14 variety tolerance efficacy
  43. Weed Control in Peanut with Brake - 2020 PE-13-20 August 17 97 DAP NTC Prowl H20 @ 32 oz/A (PRE) Valor @ 3 oz/A (PRE) Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A (23 DAP) Dual Magnum @ 16 oz/A (23 DAP) 2,4-DB @ 18 oz/A (23 DAP) Prowl H20 @ 32 oz/A (PRE) Brake @ 12 oz/A (PRE) Strongarm @ 0.225 oz/A (PRE) Cadre @ 4 oz/A (23 DAP) Dual Magnum @ 16 oz/A (23 DAP) 2,4-DB @ 18 oz/A (23 DAP)
  44. Weed Control in Peanut with Trifludimoxazin - 2020 PE-14-20 August 18 98 DAP NTC
  45. Hairy Indigo in Peanut - 2020 J. Shealey August 3 Valor (PRE) Cobra (POST) Classic (LPOST)
  46. Hairy Indigo Control with Cobra (12.5 oz/A) + 2,4-DB (16 oz/A) + Agridex (1% v/v) Grower Applied August 25 6 DAT NTC
  47. Hairy Indigo Control with Classic @ 0.5 oz/A + NIS (15 DAT) PE-41-20 10”-20” tall
  48. Questions/Comments?