Slide Presentation

TITLE    (click title to view slides)

AUTHOR
W. D. Duffie (UGA)
A.S. Culpepper (UGA)
A.C. York (NCSU)
A. MacRae (UGA)
P. Roberts (UGA)
and P. H. Jost (UGA)

DOWNLOAD

TABLE OF CONTENTS
  1. Assessing Roundup Flex Cotton Tolerance to Over-the-top Applications of Glyphosate, Dual Magnum, Staple, PGR's and Insecticides
  2. Background
  3. Roundup Ready Flex Cotton
  4. Herbicide Resistant Palmer Amaranth in Georgia
  5. Glyphosate-resistant Palmer control by residual POST cotton herbicides. 31 DAT. GA, 2006.
  6. Seed Treatments
  7. These factors warrant studying cotton plant response to post-over-top herbicide applications mixed with insecticides or PGR's
  8. Materials & Methods
  9. Treatment List
  10. Materials & Methods
  11. Cotton injury, no insecticide tank-mix partner
  12. No Injury
  13. Leaf Burn
  14. Chlorosis
  15. Percent cotton injury following 1- to 3-leaf applications. Tifton, GA 2005. 3DAT.
  16. Percent cotton injury following 1- to 3-leaf applications. Tifton, GA 2006. 3DAT.
  17. Percent cotton injury following 1- to 3-leaf applications. Midville, GA 2005. 3DAT.
  18. Percent cotton injury following 1- to 3-leaf applications. Midville, GA 2006. 3DAT.
  19. Percent cotton injury following 1- to 3-leaf applications. Rocky Mount, NC 2005. 3DAT.
  20. Percent cotton injury following 1- to 3-leaf applications. Rocky Mount, NC 2006. 3DAT.
  21. Percent cotton injury following 7- to 9-leaf applications. Tifton, GA 2005. 3DAT.
  22. Percent cotton injury following 7- to 9-leaf applications. Tifton, GA 2005. 3DAT.
  23. Percent cotton injury following 7- to 9-leaf applications. Midville, GA 2005. 3DAT.
  24. Results
  25. Conclusion



SLIDE CONTENTS
  1. Will D. Duffie1, A. S. Culpepper2, A. C. York3, A. MacRae2, P. Roberts2 and P. H. Jost4 1University of Georgia, Waynesboro, GA 2University of Georgia, Tifton, GA 3North Carolina State University, Raleigh, NC 4University of Georgia, Statesboro, GA 1-11-06 4:30 pm Grand Ballroom C Assessing Roundup Flex Cotton Tolerance to Over-the-top Applications of Glyphosate, Dual Magnum, Staple, PGR’s and Insecticides
  2. Background Transgenic Technology (RR Flex Cotton) Weed Resistance Residual Herbicides (POT) Seed Treatments
  3. planting harvest 4 leaf Layby 60% open bolls Roundup Ready® Flex Cotton In-season; emergence to 60% open 4.5 lb a.e. total in-crop Max of 1.13 lb a.e. per application Maximum of 4.5 lb ae/A from emergence to 60% open, or 128 oz W.Max or O.Max Maximum of 1.13 lb a.e. per application, or 32 oz W.Max or O.Max Maximum of 1.5 lb a.e. (44 oz W.Max or O.Max) from layby to 60% open No restrictions on timing of sequential applications Maximum of 1.5 lb a.e. (44 oz W.Max or O.Max) from 60% open till 7 days preharvest 1.5 lb a.e. 7 days Preharvest
  4. Herbicide Resistant Palmer Amaranth in Georgia ALS Glyphosate ALS or glyphosate
  5. Glyphosate-resistant Palmer control by residual POST cotton herbicides. 31 DAT. GA, 2006.
  6. Seed Treatments Thrips Control Seed treatments typically supply thrips control for 3 weeks. Temik normally provides 3+ weeks, and is rate dependent.
  7. These factors warrant studying cotton plant response to post-over-top (POT) herbicide applications mixed with insecticides or plant growth regulators.
  8. Materials & Methods Table 1. Field trial location, planting, and application information.
  9. Treatment List glyphosate* glyphosate + Dual Magnum glyphosate + Staple None Orthene Bidrin Dimethoate Mustang Max Pentia (GA Only) * Roundup WeatherMax
  10. Ratings taken: % visual injury (after each application) Rated from 0-100 2-5 DAT Yield Materials & Methods
  11. Cotton injury, no insecticide tank-mix partner
  12. No Injury
  13. Leaf Burn
  14. Chlorosis
  15. Percent cotton injury following 1- to 3-leaf applications. Tifton, GA 2005. 3DAT. * * * * *denotes significantly different from the herbicide treatment without the insecticide.
  16. Percent cotton injury following 1- to 3-leaf applications. Tifton, GA 2006. 3DAT. * * * * * *denotes significantly different from the herbicide treatment without the insecticide. *
  17. Percent cotton injury following 1- to 3-leaf applications. Midville, GA 2005. 3DAT. * *denotes significantly different from the herbicide treatment without the insecticide.
  18. Percent cotton injury following 1- to 3-leaf applications. Midville, GA 2006. 3DAT. *denotes significantly different from the herbicide treatment without the insecticide.
  19. Percent cotton injury following 1- to 3-leaf applications. Rocky Mount, NC 2005. 3DAT. * *denotes significantly different from the herbicide treatment without the insecticide.
  20. Percent cotton injury following 1- to 3-leaf applications. Rocky Mount, NC 2006. 3DAT. *denotes significantly different from the herbicide treatment without the insecticide. *
  21. Percent cotton injury following 7- to 9-leaf applications. Tifton, GA 2005. 3DAT. * * * * *denotes significantly different from the herbicide treatment without the insecticide.
  22. Percent cotton injury following 7- to 9-leaf applications. Tifton, GA 2005. 3DAT. *denotes significantly different from the herbicide treatment without the insecticide. *
  23. Percent cotton injury following 7- to 9-leaf applications. Midville, GA 2005. 3DAT. *denotes significantly different from the herbicide treatment without the insecticide. *
  24. Results Dual Magnum & Staple increased plant injury when tank-mixed with glyphosate. Orthene & Pentia slightly increased injury EC formulated insecticides (Dimethoate, Bidrin) tended to cause the highest levels of injury No yield differences observed.
  25. Conclusion With the exception of Orthene, adding insecticides with glyphosate plus Dual or Staple mixtures will likely increase visual cotton injury. Environment will affect injury Injury transient, no lasting adverse effect Glyphosate/Dual or Staple/insecticide mixtures acceptable Glyphosate/Dual or Staple/Pentia mixtures acceptable