1. Reflex® Performance in cotton weed control systems
H.S. Mclean,* E.W. Palmer, J.C. Holloway Jr.,
S.H. Martin, B.D. Black, B.W. Minton,
T.H. Beckett, and D.J. Porter.
Syngenta Crop Protection, Greensboro, NC

2. Objective
Review of available data on the performance, tolerance, and regulatory profile of fomesafen in cotton.

3. Background:
Prior to 2006
“Risk cup” would not support registration in cotton
Registration in cotton and other crops could not proceed
Minimal interest in preemergence cotton herbicides
Primary use postemergence in soybean
Present
Reassessment of fomesafen toxicology and subsequent favorable toxicology reclassification provided room in the risk cup to expand crop uses
Reflex cotton registration in 2006
Growing problems with glyphosate resistant weeds
Changing agronomic practices in cotton

4. Reflex Cotton Use Directions
Preemergence 0.25 – # ai/A
Coarse soils only
Sandy loam, loamy sand, sandy clay loam
Rainfall within 7 days of application
Maximum of 0.375# ai/A/year

5. Reflex Cotton Use Directions Preemergence 0.25 – 0.375 # ai/A
Weeds Controlled or Partially Controlled:
Cocklebur
Common ragweed
Eclipta
Lambsquarters
Morningglory species
Pigweed species
Prickly sida
Spurred anoda
Wild poinsettia
Yellow nutsedge

6. Reflex Cotton Use Directions
Post Directed 0.25 – # ai/A
All soil types
Precision directed, hooded, shielded
Plus NIS or COC
Do not apply with liquid nitrogen
Timing
6” cotton through layby
All non-bark parts of the cotton plant are susceptible
Minimum 4” bark on stem for post directed
Maximum of 0.375# ai/year

7. Reflex Cotton Use Directions Weeds Controlled Post-directed 0. 25 to 0
Reflex Cotton Use Directions Weeds Controlled Post-directed 0.25 to 0.375# ai/A
Carpetweed
Citron
Copperleaf, hophornbeam
Copperleaf, Virginia
Crotalaria, showy
Croton, tropic
Cucumber, volunteer
Eclipta
Groundcherry, cutleaf
Jimsonweed
Ladysthumb
Lambsquarters, common
Morningglory spp.
Mustard, wild
Nightshade, black
Pigweed spp.
Purslane, common
Ragweed, common
Sesbania, hemp
Smartweed, Pennsylvania
Starbur, Bristly
Venice Mallow
Witchweed
Yellow Rocket

8. Rotational Restrictions
Crop Months
Dry beans, snap beans, soybean, cotton 0
Small grains – wheat, barley, rye 4
Corn, peanut, pea, rice 10
All other crops

9. Cotton Tolerance Reflex preemergence alone 0 to 24 DAT

10. Cotton Tolerance Reflex preemergence alone 24 to 45 DAT

11. Palmer Amaranth (AMAPA) Reflex preemergence alone 24 to 45 DAT

12. Prowl® + Cotoran® Fb/ RU + Dual Magnum®

13. Prowl + Reflex Fb/ RU + Dual Magnum

14. Preemergence Control of Glyphosate Resistant Palmer Amaranth University of Georgia, Stanley Culpepper, Macon Co, GA

15. Redroot Pigweed (AMARE) Reflex preemergence alone 24 to 45 DAT

16. Yellow Nutsedge (CYPES) Reflex preemergence alone 24 to 45 DAT

17. Conclusions
In cotton preemergence:
Provides outstanding residual control of glyphosate resistant palmer pigweed and other troublesome broadleaf weeds in cotton
Is not a stand alone herbicide program and must be used as part of a complete herbicide program
Is dependent on rainfall or irrigation for activation
More data is needed to expand weeds controlled

18. Future Research
Can the use of fomesafen preemergence be expanded to other soil types:
Conservation tillage
Early preplant application
Expand spectrum of weeds controlled preemergence

19. Standard Legal Copy
©2008 Syngenta. Syngenta Crop Protection, Inc. Greensboro, NC
Important: Always read and follow label directions before buying and using these products.
Syngenta Crop Protection, Inc. warrants that its products conform to the chemical description set forth on the products’ labels. NO OTHER WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND OF FITNESS FOR A PARTICULAR PURPOSE, SHALL APPLY TO SYNGENTA PRODUCTS. Syngenta Crop Protection, Inc. neither assumes nor authorizes any representative or other person to assume for it any obligation or liability other than such as is expressly set forth herein. IN NO EVENT SHALL SYNGENTA CROP PROTECTION, INC. BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL OR SPECIAL DAMAGES RESULTING FROM ANY USE OR HANDLING OF ITS PRODUCTS. No statements or recommendations contained herein are to be construed as inducements to infringe any relevant patent now or hereafter in existence.
Reflex®, Caparol® and Dual Magnum® are registered trademarks of a Syngenta Group Company.
Prowl® is a registered trademark of BASF Corporation. Cotoran® is a registered trademark of Makhteshim Agan North America. Direx® is a registered trademark of Griffin Corporation.