Slide Presentation

TITLE    (click title to view slides)
Peanut Response To Valor Application Timings

AUTHOR
E. P. Prostko and W. C. Johnson III (GA)
W. J. Grichar (TX)
D. L. Jordan (NC)
G. A. MacDonald (FL)

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TABLE OF CONTENTS
  1. Peanut Response to Valor Application Timings
  2. Valor in Peanuts
  3. Peanut Acres Treated with Valor and Injury by Region in 2001
  4. Objective
  5. Materials and Methods
  6. Materials and Methods
  7. Materials and Methods
  8. RESULTS: Crop Injury
  9. Crop Injury Summary- I: Stunting/Leaf Burn
  10. Crop Injury Summary - II: Stunting/Leaf Burn
  11. Valor Injury
  12. RESULTS: Yield
  13. Peanut Yield in Response to Valor: Tifton, GA
  14. Peanut Yield in Response to Valor: Attapulgus, GA
  15. Peanut Yield in Response to Valor: Citra, FL
  16. Peanut Yield in Response to Valor: Lewiston, NC
  17. Peanut Yield in Response to Valor: Yoakum, TX
  18. RESULTS: Maturity
  19. Peanut Maturity in Response to Valor: Black Hulls
  20. Peanut Maturity in Response to Valor: Black + Brown Hulls
  21. Peanut Maturity in Response to Valor: Orange + Yellow Hulls
  22. Summary - I
  23. Summary - II
  24. Valor in Peanuts - 2002: Suggestions
  25. UGA Extension Weed Science



SLIDE CONTENTS
  1. Peanut Response to Valor Application Timings E. P. Prostko and W. C. Johnson III, (GA) W. J. Grichar (TX) D. L. Jordan (NC) G. A. MacDonald (FL)
  2. Valor in Peanuts labeled on April 12, 2001 G-E broadleaf weed control minimal rotation restrictions narrow application window unexpected injury
  3. Peanut Acres Treated with Valor and Injury by Region in 2001 Source: Valent U.S.A. Corp.
  4. Objective To evaluate the effects of the timing of Valor on peanut growth, yield, and maturity.
  5. Material and Methods 5 locations small plot techniques 3-4 replications Valor (3 oz/A) applied 0 to 10 DAP weed-free conditions crop injury, yield, maturity
  6. Materials and Methods
  7. Materials and Methods applications made after 3 DAP are off label peanuts were cracking or emerged on or after…… * GA1 - 7 DAP * GA2 - 10 DAP * FL - 8 DAP * NC - 7 DAP * TX - 7 DAP
  8. RESULTS Crop Injury
  9. Crop Injury Summary- I Stunting/Leaf Burn GA1 - all timings caused significant crop injury (25-88%) GA2 - significant crop injury 6, 8, and 10 DAP (13-33%) FL - no crop injury was observed
  10. Crop Injury Summary - II Stunting/Leaf Burn NC - significant crop injury when applied 7 and 10 DAP (9-18%). TX - significant crop injury when applied 7 and 10 DAP (10-30%).
  11. Valor Injury
  12. RESULTS Yield
  13. Peanut Yield in Response to Valor Tifton, GA a abc ab bc c d e
  14. Peanut Yield in Response to Valor Attapulgus, GA P = 0.66
  15. Peanut Yield in Response to Valor Citra, FL P = 0.31
  16. Peanut Yield in Response to Valor Lewiston, NC P = 0.56
  17. Peanut Yield in Response to Valor Yoakum, TX P = 0.48
  18. RESULTS Maturity
  19. Peanut Maturity in Response to Valor Black Hulls Tifton, GA September 19, 2001 GA Green Planted: May 8 a b b b b b c
  20. Peanut Maturity in Response to Valor Black + Brown Hulls Tifton, GA September 19, 2001 GA Green Planted: May 8 a ab bc bc bc b c
  21. Peanut Maturity in Response to Valor Orange + Yellow Hulls Tifton, GA September 19, 2001 GA Green Planted: May 8 c bc ab ab ab b a
  22. Summary - I Valor caused significant crop injury, particularly when applied at 6 DAP or later. Peanuts yields were not reduced by any application of Valor in 4 out of 5 tests.
  23. Summary - II In Tifton, GA, Valor caused significant yield reductions when applied 3 DAP or later. In Tifton, GA peanut maturity was delayed (7-14 days) as indicated by differences in hull color at harvest.
  24. Valor in Peanuts - 2002 Suggestions calibration pre-slurry plant 1.5” deep apply at planting do not irrigate when cracking hull scrape limited acreage
  25. University of Georgia Extension Weed Science (gaweed.com)