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AUTHOR
S. G. Wilson, University of Georgia
A. S. Culpepper, University of Georgia
A. C. York, N. C. State University

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TABLE OF CONTENTS
  1. Managing Large Morningglory in Roundup-Ready Cotton with Lay-By Herbicides
  2. Large Morningglory
  3. Study Objective
  4. Locations
  5. Materials & Methods
  6. Materials & Methods
  7. Materials & Methods
  8. Treatments
  9. Morningglory Response to Lay-By Herbicides. 2001.
  10. No Directed Application
  11. Roundup UltraMax 1.6 pt
  12. Roundup UltraMax 1.6 pt + Valor 1 oz
  13. Valor 2 oz + MSMA 2 lb
  14. Roundup UltraMax 1.6 pt + Harvade 6 oz
  15. Morningglory Re-growth
  16. Morningglory Response to Lay-By Herbicides. 2002.
  17. Large Pitted Morningglory Response to Lay-By Herbicides. 2003.
  18. Cotton Response to Lay-By Herbicides
  19. Soil Uptake of Harvade
  20. Herbicide Injury
  21. Summary
  22. Summary
  23. Summary
  24. Questions?
  25. The End



SLIDE CONTENTS
  1. S.G. Wilson, A.S. Culpepper, and A.C. York University of Georgia and N. C. State University MANAGING LARGE MORNINGGLORY IN ROUNDUP – READY COTTON WITH LAY-BY HERBICIDES
  2. STUDY OBJECTIVE: To Evaluate Lay-By Herbicide Options For Controlling Large Pitted Morningglories And Evaluate Plant Injury
  3. Locations Moultrie * Ocilla *
  4. Materials & Methods RR Variety Sprayed at 4-Leaf Stage w/ Commercial Broadcast Sprayer Plots Sprayed At Lay-By w/ Backpack Sprayer @19psi & 14.8 GPA
  5. Materials & Methods Randomized Complete Block Design Four Replications
  6. Materials & Methods Treatments Evaluated At ~ Two And Four Weeks For Efficacy Treatments Evaluated At ~ One And Two Weeks For Injury
  7. Treatments: RU + Aim RU + MSMA Caparol + MSMA Direx + MSMA Valor + MSMA RU RU + Direx RU + Harvade + COC RU + Staple RU + Valor *RU abbreviated for various brands of Monsanto’s glyphosate products at 1 lb ai/A, Staple 0.6 to 0.8/A oz, Direx 1.0-1.5 pt/A when mixed with RUand 2 pt/A when mixed with MSMA, Harvade 6-8 oz/A, Aim 0.8-1 oz/A, MSMA 2 lb ai/A Valor 1 oz/A when mixed with RU and 2 oz/A when mixed with MSMA, Caparol 2 pt/A, and COC 1 pt/A.
  8. Morningglory Response to Lay-By Herbicides. 2001. * Values followed by the same letter within a column are not different at P=0.05
  9. No Directed Application No Directed Application
  10. Roundup UltraMax 1.6 pt No Directed Application
  11. Roundup UltraMax 1.6 pt + Valor 1 oz No Directed Application
  12. Valor 2 oz + MSMA 2 lb No Directed Application
  13. Roundup UltraMax 1.6 pt + Harvade 6 oz No Directed Application
  14. Morningglory Re-growth Treatments including Aim looked excellent initially, but MG’s suckered back out by 14 DAT (right)
  15. Morningglory Response to Lay-By Herbicides. 2002. * Values followed by the same letter within a column are not different at P=0.05
  16. Large Pitted Morningglory Response to Lay-By Herbicides. 2003. * Values followed by the same letter within a column are not different at P=0.05
  17. Cotton Response to Lay-By Herbicides* * Values followed by the same letter within a column are not different at P=0.05
  18. Non-treated Control Soil Uptake of Harvade
  19. Herbicide Injury Cotton was extremely green (no woody material) at time of application At 5 DAT, injury ranged from 16-25% for Aim or Valor Mixtures
  20. Summary On 3-4’Mg, RU + Valor or Valor + MSMA were the most effective treatments On 2’ MG, RU + Staple, Valor, or Aim as well as Valor + MSMA were the most effective treatments On 9” Mg, the most effective treatments were Direx, Harvade, Valor, Aim or MSMA when mixed with RU
  21. Summary Tank mixes including Aim and Valor were more injurious Injury was worse on green cotton Harvade injury appeared as leaf chlorosis Injury was short-lived
  22. Summary No differences in yield were noted Early season weed competition was similar across the trial
  23. QUESTIONS?
  24. THE END