Slide Presentation

TITLE    (click title to view slides)
Weed Control in Strip-Tillage Peanuts

AUTHOR
Eric P. Prostko
Extension Weed Specialist
University of Georgia
Tifton, GA

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TABLE OF CONTENTS
  1. Weed Control in Strip-Tillage Peanuts
  2. The key to weed management in strip-tillage is to start off with a clean seed-bed at planting!
  3. Weeds of Concern
  4. Timing of Burndown
  5. Burndown Options
  6. Glyphosate vs. Paraquat
  7. Effect of glyphosate rate and wheat growth stage on wheat termination - 3 WAT
  8. Gramoxone Inteon
  9. Gramoxone Max vs. Gramoxone Inteon
  10. What about Temperature?
  11. The influence of air temperature on weed control with glyphosate - 14 DAT
  12. The influence of air temperature on weed control with paraquat - 14 DAT
  13. DNA’s or Yellow Herbicides
  14. What have we learned about using yellow herbicides in strip-tillage systems??? (2004-2005)
  15. Strongarm or Valor
  16. Burndown + PRE Tank-Mixes
  17. Scout Early After Planting
  18. Grass Problems Later
  19. Increased Weed Control Costs
  20. UGA Weed Science



SLIDE CONTENTS
  1. Weed Control in Strip-Tillage Peanuts Eric P. Prostko Extension Weed Specialist Department of Crop & Soil Sciences University of Georgia
  2. The key to weed management in strip-tillage is to start off with a clean seed-bed at planting!
  3. Weeds of Concern
  4. Timing of Burndown 2,4-D in February/March for cutleaf eveningprimrose Smaller weeds Lower rates Avoid drift problem More time to clean out spray tank Burndown @ 3-4 weeks before planting may still need to do something at planting Add Gramoxone to residual herbicides
  5. Burndown Options Primary glyphosate paraquat Tank-mixes Valor 2,4-D (rotations) Aim - ???? based upon weed species
  6. Glyphosate vs. Paraquat
  7. Effect of glyphosate rate and wheat growth stage on wheat termination – 3 WAT 15 trials conducted from 1998-2000 averaged across 11 wheat varieties (From LSU Weed Science Group)
  8. A new formulation of paraquat 2 lbs ai/gallon “User- friendly” alginate alerting agent purgative emetic green dye
  9. Gramoxone Max vs. Gramoxone Inteon
  10. What about Temperature? Depends upon weed and herbicide Warmer is better Watch out for sudden temperature drops
  11. The influence of air temperature on weed control with glyphosate – 14 DAT Source: Hager and Spraque, University of Illinois, 2003.
  12. The influence of air temperature on weed control with paraquat – 14 DAT Source: Hager and Spraque, University of Illinois, 2003.
  13. DNA’s or Yellow Herbicides Prowl/Pendimax vs. Sonalan How do we apply? Rate Method Time EC or H20 weeds up at application irrigation or rainfall
  14. What have we learned about using yellow herbicides in strip-tillage systems??? (2004-2005) Rate 1.5 lb ai/A > 1.00 lb ai/A Formulation Prowl EC = Prowl H20 Timing PRE > 4 WBP > 8 WBP Method Spray > Fertilizer Fertilizer Rate 500 lbs/A > 250 lbs/A
  15. Strongarm or Valor dryland or irrigated weed species rotational crops Crop injury risks Sprayer cleanup ALS resistance
  16. Burndown + PRE Tank-Mixes Usually not a problem earlier applied, less control later in season
  17. Scout Early After Planting Do not wait too late! 7-10 DAP early applications of Gramoxone should control most escapes and set up later POST treatments like Cadre
  18. Grass Problems Later Plan on treating with Poast, Select, or Arrow Texas panicum goosegrass crowfootgrass
  19. Increased Weed Control Costs 2,4-D @ 1 pt/A ($1.50) + application ($4.00) = $5.50/A Generic Glyphosate @ 1 qt/A ($3.75) + application ($4.00) = $8.75/A Extra 1 pt/A of Prowl = $2.50/A Extra 8 ozs/A of Gramoxone Inteon ($1.68) Arrow @ 8 ozs/A ($8.75) + COC @ 1% v/v ($1.20) + application ($4.00) = $13.95/A Total = $32.38
  20. www.gaweed.com