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P.M. Eure*, E.P. Prostko, and R.M. Merchant

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TABLE OF CONTENTS
  1. Peanut Response to Foliar Applied Pyroxasulfone Tank-Mixtures
  2. Introduction
  3. Current and Future Pyroxasulfone Products
  4. Weed Control with Pyroxasulfone
  5. Previous Research
  6. Pyroxasulfone 85WG Applied 10 DAP
  7. Peanut Response to Pyroxasulfone 85WG @ 8 oz/A + NIS @ 0.25% v/v
  8. Objective
  9. Materials and Methods-I
  10. Materials and Methods-II
  11. Materials and Methods-III
  12. Materials and Methods-IV
  13. Results - Statistics
  14. 2009
  15. Peanut Stunting
  16. Paraquat vs Pyroxasulfone
  17. Peanut Stunting
  18. NTC
  19. Peanut Yield
  20. Peanut Yield
  21. 2010
  22. Peanut Stunting
  23. Paraquat 2SL @ 8 oz/A
  24. Peanut Stunting
  25. NTC
  26. Peanut Yield
  27. Peanut Yield
  28. Summary
  29. Future Research
  30. Questions or Comments?



SLIDE CONTENTS
  1. Peanut Response to Foliar Applied Pyroxasulfone Tank-Mixtures P.M. Eure*, E.P. Prostko, and R.M. Merchant Department of Crop & Soil Sciences
  2. Introduction Inhibitor of VLCFA synthesis Low use rates Developed for use in corn, soybean, sunflower, and wheat
  3. Current and Future Pyroxasulfone Products
  4. Weed Control with Pyroxasulfone Non-treated control Pyroxasulfone 85 WG @ 1.5 oz/A* * 5 WAT
  5. Previous Research Peanut Tolerance (Prostko et al. 2011) PRE Significant stunting at 1 of 2 locations POST Excellent tolerance when applied 44-51 days after planting No reduction in peanut yield E.P. Prostko, T.L. Grey, T.M. Webster, and R.C. Kemerait (2011) Peanut Tolerance to Pyroxasulfone. Peanut Science: July 2011, Vol. 38, No. 2, pp. 111-114.
  6. 8 oz/A 4 oz/A Pyroxasulfone 85WG Applied 10 DAP P.M. Eure, E.P. Prostko, A.S. Culpepper, W.K. Vencill, and R.M. Merchant (2012) Cotton and Peanut Response to Pyroxasulfone, Southern Weed Science Society PROC: 65:101.
  7. Peanut Response to Pyroxasulfone 85WG @ 8 oz/A + NIS @ 0.25% v/v 60 DAP 90 DAP 99 DAP
  8. Objective Evaluate peanut response to pyroxasulfone applied POST with and without tank-mix partners
  9. Materials and Methods-I Location: UGA Ponder Research Farm 2009 2010 Soil type: Tifton loamy sand
  10. Materials and Methods-II Factorial design (2 x 6 ) Pyroxasulfone 85WG (2) 0 or 4 oz/A Foliar herbicide system (6) No foliar herbicide Paraquat 2SL (8 oz/A) Paraquat 2SL (12 oz/A) + Bentazon 4SL (8 oz/A) Paraquat 2SL (12 oz/A) + Bentazon/Acifluorfen 4SL (24 oz/A) Imazapic 2AS (4 oz/A) Lactofen 2SC (12.5 oz/A) All herbicide treatments included 0.25% v/v NIS
  11. Materials and Methods-III Application method: CO2-pressurized backpack sprayer 15 GPA DG 11002XR spray tips Cultivar: ‘GA-06G’ Plots maintained weed- free
  12. Materials and Methods-IV Data recorded Peanut stunting Yield Adjusted to 10% moisture Data subjected to ANOVA and means separated using Fisher’s Protected LSD Test (P = 0.10) when appropriate
  13. Results - Statistics No interaction between year, pyroxasulfone rate, and foliar herbicide system Main effects will be discussed: Pyroxasulfone rate Foliar herbicide system
  14. 2009
  15. Peanut Stunting *Data pooled over foliar herbicide systems
  16. Paraquat 2SL @ 8 oz/A Pyroxasulfone 85WG @ 4 oz/A + Paraquat 2SL @ 8 oz/A 42 DAT
  17. Peanut Stunting *Data pooled over pyroxasulfone rates
  18. NTC Pyroxasulfone 85WG @ 4 oz/A + Paraquat 2SL @ 12 oz/A + Bentazon 4SL @ 8 oz/A 42 DAT
  19. Peanut Yield *Data pooled over foliar herbicide systems P=0.42
  20. Peanut Yield *Data pooled pyroxasulfone rates P=0.21
  21. 2010
  22. Peanut Stunting *Data pooled over foliar herbicide systems
  23. Paraquat 2SL @ 8 oz/A Pyroxasulfone 85WG @ 4 oz/A + Paraquat 2SL @ 8 oz/A 29 DAT
  24. Peanut Stunting *Data pooled pyroxasulfone rates
  25. NTC Pyroxasulfone 85WG @ 4 oz/A + Paraquat 2SL @ 12 oz/A + Bentazon 4SL @ 8 oz/A 29 DAT
  26. *Data pooled over foliar herbicide systems Peanut Yield P=0.33
  27. Peanut Yield *Data pooled pyroxasulfone rates P=0.57
  28. Summary Peanut stunting 2009: Pyroxasulfone did not influence peanut stunting 2010: Addition of pyroxasulfone to tank-mixtures increased peanut stunting 8% (6 DAT) Complete recovery (29 DAT) Peanut yield No interaction between pyroxasulfone and foliar systems No main effect of pyroxasulfone or foliar system on yield
  29. Future Research Evaluate peanut cultivar response to PRE applied pyroxasulfone Peanut tolerance to split applications EPOST + POST Tank-mixes of pyroxasulfone with other herbicides Weed management systems Evaluate pyroxasulfone efficacy on various weed species
  30. Questions or Comments?