1 / 25

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. S.G. Wilson, A.S. Culpepper, and A.C. York University of Georgia and N. C. State University. STUDY OBJECTIVE:. To Evaluate Lay-By Herbicide Options For Controlling Large Pitted Morningglories

keely-erickson
Download Presentation

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

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MANAGING LARGE MORNINGGLORY IN ROUNDUP – READY COTTON WITH LAY-BY HERBICIDES S.G. Wilson, A.S. Culpepper, and A.C. York University of Georgia and N. C. State University

  2. STUDY OBJECTIVE: To Evaluate Lay-By Herbicide Options For Controlling Large Pitted Morningglories And Evaluate Plant Injury

  3. Locations * Ocilla * Moultrie

  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. RU + Aim RU + MSMA Caparol + MSMA Direx + MSMA Valor + MSMA RU RU + Direx RU + Harvade + COC RU + Staple RU + Valor Treatments: *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. No Directed Application Roundup UltraMax 1.6 pt

  11. No Directed Application Roundup UltraMax 1.6 pt + Valor 1 oz

  12. No Directed Application Valor 2 oz + MSMA 2 lb

  13. No Directed Application Roundup UltraMax 1.6 pt + Harvade 6 oz

  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

More Related