Roundup Ready Technology

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Presentation transcript:

Roundup Ready Technology Approximately 350,000 cotton acres in LA in 2007 Vast majority planted to transgenic variety for insect and weed problems Mostly Roundup Ready varieties for weed control

Roundup Ready Technology Eliminated applications and tillage operations Broad spectrum of control Rotational flexibility Flex introduction

Roundup Ready Flex Increased tech fees Larger faster moving equipment Co-applications (herbicides, insecticides, PGR)

D. K. Miller, D. R. Lee, and M. S. Mathews LSU AgCenter Two-year Evaluation of Cotton Tolerance to POST Co-application of Prowl H2O and Insecticides D. K. Miller, D. R. Lee, and M. S. Mathews LSU AgCenter

Objectives Investigate effects of insecticides on Roundup Ready Flex cotton tolerance when co-applied with glyphosate and Prowl H2O

Materials and Methods Northeast Research Station, St. Joseph LA RCB; 4 replications Planted 5/3/06 and 5/1/07; 6.67’ x 25’ plots; ST4554B2RF (06’) DP 164 B2RF (07’) CO2 sprayer; 15 GPA; 4-5 leaf

Materials and Methods Roundup Weathermax at 22 oz/A Roundup Weathermax at 22 oz/A plus Prowl H2O at 32 oz/A alone or plus: Acephate (0.5 lb/A) Baythroid (2.1 oz/A) Bidrin (6.4 oz/A) Centric (1.88 oz/A) Dimethoate (8 oz/A) Karate Z (2 oz/A) Mustang Max (3.5 oz/A) Trimax (1.5 oz/A) Vydate C-LV (13.6 oz/A)

Parameters Measured Visual injury 5, 14, and 28 DAT Plant height 7 and 21 DAT Seedcotton Yield ANOVA

Injury 5 DAT 2006

Injury 5 DAT 2007

Injury 14 DAT 2006 14 to 23%

Injury 14 DAT 2007

Cotton Height 7 DAT 2006 17 to 19 cm

Cotton Height 7 DAT 2007 16 to 19 cm

Cotton Height 21 DAT 2006 0% 34 to 41 cm

Cotton Height 21 DAT 2007 0% 33 to 36 cm

Yield 2006 3349 to 4039 lb/A

Yield 2007 2462 to 2763 lb/A

Conclusion In Flex cotton, glyphosate co-application with Prowl H2O and insecticides can offer producers the ability to integrate pest management strategies and reduce application costs with no long term effect on crop Questions???