Slide Presentation

TITLE    (click title to view slides)
2023 Soybean and Sorghum Weed Control Update

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

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TABLE OF CONTENTS
  1. 2023 Soybean Weed Control Update
  2. Dicamba Drift or Aminopyralid Carryover? Pierce Co - 2022
  3. Soybean Weed Control Simplified
  4. Metribuzin Products
  5. Metribuzin in Soybeans - 2022
  6. Valor in GA Soybeans?
  7. PPO-Resistance in US
  8. But would be OK with ...
  9. Soybean Injury Caused by Envive 41.3WG @ 3.5 oz/A 10 DAP
  10. "Old School" Conventional Systems
  11. Weed Control in Conventional Soybeans
  12. Conventional Soybeans
  13. Soybean Weed Control Without New Technology - 2022
  14. Anthem Max, Dual, Warrant, Zidua, Outlook, Prowl????
  15. Group 15’s - Residuals
  16. PPO Injury on Soybean
  17. Classic 25DG @ 0.67 oz/A + NIS Injury on Non-STS Soybeans
  18. LibertyLink GT27
  19. Tropical Spiderwort - 2022
  20. Other Options??? (Seedbank Mgt.)
  21. Questions/Comments
  22. Weed Control in Grain Sorghum - 2023
  23. Grain Sorghum Weed Control
  24. A New (er) Product to Consider?
  25. Grain Sorghum Weed Control - 2021
  26. Huskie Injury on Sorghum
  27. Texas Panicum in Grain Sorghum
  28. New Grain Sorghum Weed Control Technologies (Non-GMO)
  29. Grain Sorghum Weed Control - 2022 I-Growth
  30. DoubleTeam Sorghum - 2022
  31. DoubleTeam(TM) System - First Act Off-Types
  32. Inzen Grain Sorghum - 2022
  33. Questions/Comments?



SLIDE CONTENTS
  1. 2023 Soybean Weed Control Update Eric P. Prostko Professor and Extension Weed Specialist Dept. Crop & Soil Sciences
  2. Dicamba Drift or Aminopyralid Carryover? Pierce Co - 2022 Replant Original
  3. Soybean Weed Control Simplified Start clean Narrow rows (< 30”) PRE Metribuzin + Group 15 or Prowl tolerant variety Irrigation or rainfall POST + Residual (weeds <3” tall) Post = Reflex or Prefix or Warrant Ultra or Liberty or Dicamba (Engenia/Tavium/ Xtendimax) or Enlist One (2,4-D choline) or Enlist Duo (glyphosate + 2,4-D choline) Residual = Anthem Flexx/Max or Dual or Warrant or Outlook or Zidua Check tank-mix sites first
  4. Metribuzin Products
  5. Metribuzin in Soybeans - 2022 SB-01-22 April 26 12 DAT NTC (~40-50 AMAPA/ft2) Tricor 4F 8 oz/A PRE
  6. Valor in GA Soybeans? Effective, legal and labeled but……. Valor fb Reflex/Prefix/Warrant Ultra is a good weed control program but a bad resistance mgt plan! Unless you hand-weed escapes! Weed control in cotton and peanut without Valor/Reflex?
  7. PPO-Resistance in US 40 reported cases worldwide 26 reported cases in US first identified in US in 2002 tall waterhemp (Illinois) 6 weed species (US) tall waterhemp, Palmer amaranth, redroot pigweed, common ragweed, goosegrass, annual bluegrass 1 recently confirmed case in GA Source: Heap, I. The International Herbicide-Resistant Weed Database. Online. Monday. October 17, 2022 . Available www.weedscience.org Copyright © 1993- 2022 WeedScience.org All rights reserved.
  8. But would be OK with …… PRE Valor or Envive (Valor + Classic + Harmony) or Surveil (Valor + FirstRate) or Fierce (Valor + Zidua) POST Roundup + Xtendimax/ Engenia + residual (Xtend System) or Liberty + residual (Liberty-Link or XtendFlex System) or Liberty + Enlist One + residual (Enlist System)
  9. Soybean Injury Caused by Envive 41.3WG @ 3.5 oz/A 10 DAP NTC Envive SB-21-11
  10. “Old School” Conventional Systems
  11. Weed Control in Conventional Soybeans All depends upon the development and spread of PPO resistance (WSSA/HRAC MOA #14)!
  12. Conventional Soybeans PPO resistant weeds = SOL (really!) Metribuzin – PRE Prowl or Group 15’s Reflex, Cobra, Ultra Blazer, Prefix, Warrant Ultra Classic or FirstRate (sicklepod + MG) STS® (1993) - single gene (non-GMO) Bolt™ (2015) - 2 genes (non-GMO)
  13. Soybean Weed Control Without New Technology - 2022 SB-01-22 August 1 110 DAP
  14. Anthem Max, Dual, Warrant, Zidua, Outlook, Prowl????
  15. Group 15’s - Residuals CN-04-21 April 18 21 DAT NTC Dual II Magnum 7.62EC 16 oz/A (PRE)
  16. PPO Injury on Soybean
  17. Classic 25DG @ 0.67 oz/A + NIS Injury on Non-STS Soybeans WT-01-21 July 19 6 DAT
  18. tolerant to glyphosate, glufosinate, isoxaflutole (Alite™ 27) Alite™ 27 NOT labeled for use GA PPI or PRE 1.5-2.0 oz/A No UGA-OVT variety data I have conducted no research?
  19. Tropical Spiderwort - 2022 TSW-01-22 August 17 22 DAT Roundup PowerMax3 5.88SL @ 25 oz/A Pursuit 2SL @ 4 oz/A Roundup PowerMax3 5.88SL @ 25 oz/A Classic 25DG @ 0.5 oz/A Roundup PowerMax3 5.88SL @ 25 oz/A FirstRate 84WG @ 0.3 oz/A
  20. Other Options??? (Seedbank Mgt.) Seed Mills Integrated Harrington Seed Destructor ~$55,000 Redekop Seed Control ~$70,000 Chaff Lining $5000-$6,000 Blue LED Light Weed Seed Destroyer heat + blue light $30,000 Weed Zapper $69,000-$89,000 Crop Zone Electrophysical weeder + Volt.fuel Cost???????
  21. Questions/Comments
  22. Weed Control in Grain Sorghum – 2023 Eric P. Prostko Extension Weed Specialist Seth McAllister, Terrell Co. (October 2022)
  23. Grain Sorghum Weed Control Start clean! Concep treated seed Dual Magnum or Outlook or Warrant (PRE) Atrazine 4L @ 1.5 QT/A (EPOST) Add Huskie if you have ATZ resistance Paraquat (Hooded sprayer) Mechanical Cultivation
  24. A New (er) Product to Consider? Huskie 2.06EC Bayer CropScience Buctril (1.75 lbs/gal) + pyrasulfotole (0.31 lbs/gal) MOA = 6 + 27 Postemergence (13-16 oz/A) 3-leaf to 12” tall sorghum Broadleaf weeds, good on pigweed Tank-mix with atrazine (16 oz/A) Huskie FX = Huskie + Starane
  25. Grain Sorghum Weed Control - 2021 GS-04-21 July 16 58 DAP NTC Warrant @ 48 oz/A Atrazine @ 16 oz/A Huskie @ 16 oz/A Induce @ 0.25% v/v AMS @ 5% v/v Applied 19 DAP
  26. Huskie Injury on Sorghum
  27. Texas Panicum in Grain Sorghum Terrell Co. 08/05/22
  28. New Grain Sorghum Weed Control Technologies (Non-GMO) Igrowth™ Alta/UPL ImiFlex (imazamox) PRE/POST DoubleTeam™ S&W Seed Partners/ADAMA FirstAct (quizalofop) POST Maybe cultivars??? S&W Seeds SP58M85DT/SP45A45DT SP31C06DT (cream colored) Inzen™ Pioneer/Corteva Zest (nicosulfuron) POST
  29. Grain Sorghum Weed Control – 2022 I-Growth NTC GS-01-22 August 1 69 DAT (POST)/77 DAT (EPOST) Mocassin II Plus 7.64EC @ 21 oz/A (PRE) fb Imiflex 1AS @ 6 oz/A Agridex @ 1% v/v POST (V7, 9-10” tall, 22 DAP) Imiflex 1AS @ 4 oz/A Agridex @ 1% v/v EPOST (V3, 4” tall, 14 DAP)
  30. DoubleTeam Sorghum - 2022 GS-01-22 August 1 69 DAT (POST) NTC
  31. DoubleTeam™ System – First Act Off-Types GS-02-21 June 23 9 DAT
  32. Inzen Grain Sorghum - 2022 GS-01-22 August 1 69 DAT (POST) NTC Everprex 7.62EC @ 16 oz/A (PRE) fb Zest 75DG @ 0.67 oz/A + Aatrex 4L @ 48 oz/A + Agridex @ 1% v/v (POST)
  33. Questions/Comments? eprostko@uga.edu gaweed.com