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Jimmy X. Zumba

Response of Roundup Ready Flex Cotton to Co-application with Insecticides and Plant Growth Regulators. Jimmy X. Zumba D. K. Miller, R. Bagwell, E. Burris, E. L. Clawson, S. T. Kelly, B. R. Leonard, A. M. Stewart, and M. S. Mathews LSU AgCenter. Roundup Ready Technology.

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Jimmy X. Zumba

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  1. Response of Roundup Ready Flex Cotton to Co-application with Insecticides and Plant Growth Regulators Jimmy X. Zumba D. K. Miller, R. Bagwell, E. Burris, E. L. Clawson, S. T. Kelly, B. R. Leonard, A. M. Stewart, and M. S. Mathews LSU AgCenter

  2. Roundup Ready Technology • Over 1,200,000 cotton acres planted in LA in last two years. • 99 % Transgenic cotton in 2006 • Mostly Roundup Ready varieties for weed control

  3. Roundup Ready Technology • Eliminate applications and tillage operations • Easy application trigger • Broad spectrum of control • Tank-mix partners • Flex introduction (variety and herbicide)

  4. Justification • -Synergies or negative interactions between this new herbicide and other agrochemicals, growth regulators and insecticide, and on integrated pest and crop management strategies

  5. Objectives • -Investigate effects of insecticides and plant growth regulators when co-applied with MON 3539 (Roundup Herbicide) on Roundup Ready Flex cotton. • -Determine if possible effects are influenced by cotton growth stage at time of application.

  6. Materials and Methods • Northeast Research Station, St. Joseph LA in 2005 and 2006 • ST4554B2RF • RCB; factorial treatment arrangement; 4 replications • Plots 6.67’ x 12’ • Tractor mounted compressed air sprayer; 110 02; 32 PSI; 15 GPA.

  7. Materials and Methods • Factor A: Growth Stage Pinhead Square First Bloom • Factor B: Herbicide Treatment MON 3539 (0.75 lb ai/A) MON 3539 (0.75 lb ai/A) + Mepex Gin Out (0.022 lb ai/A) • Factor C: Insecticide Acephate (0.5 lb ai/A) Intruder (0.028 lb ai/A) Battery (0.1 lb ai/A) Karate Z (0.033 lb ai/A) Baythroid (0.033 lb ai/A) Lannate (0.4 lb ai/A) Bidrin (0.4 lb ai/A) Larvin (0.6 lb ai/A) Capture (0.0616 lb ai/A) Mustang Max (0.022 lb ai/A) Centric (0.047 lb ai/A) Prolex (0.016 lb ai/A) Curacron (1.0 lb ai/A) Steward (0.11 lb ai/A) Denim (0.01 lb ai/A Tracer (0.75 lb ai/A) Diamond (0.58 lb ai/A) Trimax (0.047 lb ai/A) Dimethoate (0.25 lb ai/A) Vydate (0.4 lb ai/A)

  8. First Bloom Pinhead(Insect Damage) Grow Stages

  9. Parameters Measured • Visual injury 6 and 14 DAT • Plant height 7 DAT • Seedcotton Yield • Cotton maturity

  10. First Year Pinhead Square First Bloom MON 3539 MON 3539 + Mepex Gin Out MON 3539 MON 3539 + Mepex Gin Out Bidrin 0 d 0 d 1 d 13 a Curacron 7 abcd 6 bcd 7 abcd 4 bcd Lannate 0 ab 3 bcd 4 bcd 6 bcd Capture 0 d 8 abc 1 d 1 d Dimethoate 0 d 0 d 4 bcd 1 d Battery 4 bcd 0 d 1 d 1 d No insecticide 0 d 0 d 1 cd 1 d Two year combined Insecticide Injury 5 DAT (%) Lannate 10 a Curacron 6 b Battery 1 c Capture 1 c Bidrin 2 c Dimethoate 2 c No Insecticide 1 c Percent Visual Injury 6 DAT

  11. Percent Visual Injury 14 DAT

  12. (cm) Cotton Height 7 DAT

  13. Cotton Maturity(% first pick)

  14. Yield

  15. Conclusion -When applied according to labeled rates in Roundup Ready Flex cotton varieties ®, Roundup Flex herbicide® co-applications can offer producers the ability to integrate pest and crop management strategies and reduce application costs with minimal effect on crop.

  16. Questions?

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