Slide Presentation

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AUTHOR
E. P. Prostko,T. L. Grey, T. M. Webster
University of Georgia, USDA/ARS

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TABLE OF CONTENTS
  1. Peanut Response to Ignite (glufosinate) in Georgia - 2010
  2. Ignite (glufosinate) has become very popular in Georgia due to HR-Palmer amaranth.
  3. Ignite Sales in Georgia
  4. Potential Problems with Ignite
  5. Ignite @ 32 oz/A + Staple 1.5 oz/A Drift Seminole County, GA (June 2011)
  6. Objective
  7. Materials and Methods - I
  8. Materials and Methods - II Locations
  9. Materials and Methods - III Peanut Growth Stages
  10. Reproductive Growth Stages of Peanut
  11. Statistical Analysis
  12. Results
  13. Peanut Yield Loss (%) From Ignite Applied at 30 DAP
  14. Peanut Yield Loss (%) From Ignite Applied at 60 DAP
  15. Peanut Yield Loss (%) From Ignite Applied at 90 DAP
  16. Peanut Response to Ignite @ 2 oz/A
  17. Peanut Response to Ignite @ 8 oz/A
  18. Peanut Response to Ignite @ 32 oz/A
  19. Estimated Peanut Yields Losses (%) from Ignite 2.34SL
  20. Was there any correlation between visual estimates of peanut injury and yield loss?
  21. Peanut Injury vs. Yield Loss Ignite Applied 30 DAP
  22. Peanut Injury vs. Yield Loss Ignite Applied 60 DAP
  23. Peanut Injury vs. Yield Loss Ignite Applied 90 DAP
  24. Summary - I
  25. Summary - II
  26. Questions?



SLIDE CONTENTS
  1. Peanut Response to Ignite (glufosinate) in Georgia - 2010 E.P. Prostko*, T.L. Grey, and T.M. Webster
  2. Ignite (glufosinate) has become very popular in Georgia due to HR-Palmer amaranth.
  3. Ignite Sales in Georgia gallons +174%
  4. Potential Problems with Ignite Drift Sprayer contamination How sensitive are peanuts? Pulaski County Peanut Field 2009 Misapplication of Ignite
  5. Ignite @ 32 oz/A + Staple 1.5 oz/A Drift Seminole County, GA (June 2011)
  6. Objective To determine the response of peanut to Ignite (glufosinate) applied at different rates and timings. Similar research was also conducted in FL, SC, and TX
  7. Materials and Methods - I Small plot techniques Split-plot design Whole plot = timing (3) 30, 60, 90 DAP Sub-plot = rate (6) 0,2,4,8,16,32 oz/A Ignite 2.34SL Locations (2) Ponder Farm, Plains 4 replications weed-free irrigated
  8. Materials and Methods - II Locations
  9. Materials and Methods III Peanut Growth Stages
  10. Reproductive Growth Stages of Peanut Growth stages of peanut K. J. Boote, Peanut Science 9:35-40 Beginning pod Beginning peg R2 R3 R1 Beginning bloom R4 R7 R5 R6 Beginning seed Beginning maturity Full pod Full seed
  11. Statistical Analysis PROC MIXED Procedure Location - Random effect No interaction Data combined over location Timing X rate interaction Linear regression for each timing NTC Average Yields Ponder Farm: 6329-6476 lb/A Plains: 4776-5344 lb/A
  12. Results
  13. Peanut Yield Loss (%) From Ignite Applied at 30 DAP Ponder Farm + Plains Ignite 2.34SL Rate (oz/A) % GA-06G
  14. Peanut Yield Loss (%) From Ignite Applied at 60 DAP Ponder Farm + Plains Ignite 2.34SL Rate (oz/A) % GA-06G
  15. Peanut Yield Loss (%) From Ignite Applied at 90 DAP Ponder Farm + Plains Ignite 2.34SL Rate (oz/A) % GA-06G
  16. Peanut Response to Ignite @ 2 oz/A Applied 30 DAP Applied 60 DAP Applied 90 DAP PE-01-10 September 17 129 DAP
  17. Peanut Response to Ignite @ 8 oz/A Applied 30 DAP Applied 60 DAP Applied 90 DAP PE-01-10 September 17 129 DAP
  18. Peanut Response to Ignite @ 32 oz/A Applied 30 DAP Applied 60 DAP Applied 90 DAP PE-01-10 (Ponder Farm) September 17 129 DAP
  19. Estimated Peanut Yields Losses (%) from Ignite 2.34SL GA-06G 2 locations (Ponder, Plains) 2010
  20. Was there any correlation between visual estimates of peanut injury and yield loss?
  21. Peanut Injury vs. Yield Loss Ignite Applied 30 DAP Visual Estimates of Injury (%) Yield Loss (%)
  22. Peanut Injury vs. Yield Loss Ignite Applied 60 DAP Visual Estimates of Injury (%) Yield Loss (%)
  23. Peanut Injury vs. Yield Loss Ignite Applied 90 DAP Visual Estimates of Injury (% Yield Loss (%)
  24. Summary - I Peanuts were more sensitive to Ignite at 30 and 90 DAP when compared to 60 DAP?? As little as 2 oz/A of Ignite has the potential to reduce peanut yields by 6-19%.
  25. Summary - II Strong linear correlation (R2 > 0.84) between crop injury estimates and yield loss for 30 and 90 DAP. Ignite drift and sprayer contamination must be avoided!
  26. Questions? www.gaweed.com