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2012: How Tillage and Application Timing of Reflex Affects Palmer Amaranth Control

AUTHOR
J. M. Kichler, and A. S. Culpepper
University of Georgia

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TABLE OF CONTENTS
  1. 2012: How Tillage and Application Timing of Reflex Affects Palmer Amaranth Control
  2. Tillage is now a common scene
  3. Growers: Pre-plant/PRE herbicides applied
  4. Percent control of Palmer amaranth by Reflex as impacted by tillage. 38 DAP
  5. Prowl (1 pt) + Reflex (1 pt)
  6. Tillage in Cotton During 2010
  7. Percent Palmer Amaranth control with Reflex PPI and PRE in 2010.
  8. Reflex: Soil moist at planting; rainfall 13 DAT.
  9. Cotton injury is a big concern for growers!!
  10. Prowl + Reflex
  11. Objective
  12. Materials and Methods
  13. Application Methods
  14. Herbicide Treatments: Comparison 1
  15. Percent cotton injury with Reflex PPI, PRE, or Split Applied at 12 DAT.
  16. Percent Palmer Amaranth control with Reflex PPI, PRE, or Split Applied at 35 DAT.
  17. Non-treated
  18. Prowl + Reflex 1 pt PPI
  19. Prowl + Reflex 1 pt PRE
  20. Prowl + Reflex ½ pt fb ½ pt Split Application
  21. Herbicide Treatments: Comparison 2
  22. Percent cotton injury with Reflex Split Applied at 12 DAT.
  23. Percent Palmer control with Reflex Split Applied at 35 DAT.
  24. Percent Palmer control with Reflex Split Applied at 35 DAT.
  25. Conclusions
  26. Any Questions?



SLIDE CONTENTS
  1. 2012: How Tillage and Application Timing of Reflex Affects Palmer Amaranth Control J. M. Kichler1, and A. S. Culpepper1 1 University of Georgia Cooperative Extension
  2. Tillage is now a common scene
  4. Percent control of Palmer amaranth by Reflex as impacted by tillage. 38 DAP.* 80 B 91 A 3 C Prowl 1 pt/A + Reflex 1 pt/A strip-till field cultivator rototiller 75 B disk
  5. PPI- shallow incorporation Prowl (1 pt) + Reflex (1 pt) 30 days after treatment PPI-Disk
  6. Tillage in Cotton During 2010
  7. Percent Palmer Amaranth control with Reflex PPI and PRE in 2010. 99 A 79 B 98 A Irrigated Dryland
  8. Reflex: Soil moist at planting; rainfall 13 DAT. PPI PRE
  9. Cotton injury is a big concern for growers!!
  10. Irrigated May 13 Planted May 14 Irrigated May 19 during emergence None Prowl + Reflex PRE Prowl + Reflex PPI - Rototill
  11. Objective To determine if PRE, PPI or PRE and PPI split applications (PPI fb PRE) of Reflex has an impact on Palmer amaranth control.
  12. Materials and Methods Tift County Plot Size 6 by 25 feet Replicated 4 times Randomized Complete Block Design DP 1050 BRF 10 Treatments
  13. Application Methods PPI with a field cultivator before planting PRE immediately after planting Irrigated (no irrigation or rainfall for 7 DAT)
  14. Herbicide Treatments: Comparison 1 PPI Options: Prowl + Reflex 1 pt/A Prowl + Reflex 1.5 pt/A PRE Options: Prowl + Reflex 1 pt/A Prowl + Relfex 1.5 pt/A Split (PPI fb PRE) Prowl + Reflex 0.5 pt/A fb Reflex 0.5 pt/A Prowl + Reflex 0.75 pt/A fb Reflex 0.75 pt/A
  15. Percent cotton injury with Reflex PPI, PRE, or Split Applied at 12 DAT. 2 D Prowl H2O 2 pts/A included with all treatments. 5 C 15 A 5 C
  16. Percent Palmer Amaranth control with Reflex PPI, PRE, or Split Applied at 35 DAT. 60 D 72 C 81 B Prowl H2O 2 pts/A included with all treatments. 98 A 95 A
  17. Non-treated
  18. Prowl + Reflex 1 pt PPI
  19. Prowl + Reflex 1 pt PRE
  20. Prowl + Reflex ½ pt fb ½ pt Split Application
  21. Herbicide Treatments: Comparison 2 Split (PPI fb PRE) Prowl + Reflex 0.75 pt/A fb Reflex 0.5 pt/A Prowl + Reflex 0.75 pt/A fb Reflex 0.75 pt/A Prowl + Reflex 1 pt/A fb Reflex 0.5 pt/A Prowl + Reflex 0.75 pt/A fb Reflex 0.5 pt/A + diuron
  22. Percent cotton injury with Reflex Split Applied at 12 DAT. 0 B Prowl H2O 2 pts/A included with all treatments.
  23. Percent Palmer control with Reflex Split Applied at 35 DAT. 95 A 96 A 99 A Prowl H2O 2 pts/A included with all treatments.
  24. Percent Palmer control with Reflex Split Applied at 35 DAT. 95 A 96 A 99 A Prowl H2O 2 pts/A included with all treatments.
  25. Conclusions In irrigated production, PRE applications are more effective if injury is not a concern. In dryland production, the split applications give you the best of both worlds.
  26. Any Questions?