On-Farm Performance of Glytol Liberty Link and Widestrike Roundup Ready Flex Cotton Varieties in Georgia

Tyson, William

On-Farm Performance of Glytol Liberty Link and Widestrike Roundup Ready Flex Cotton Varieties in Georgia

Tuesday, January 7, 2014

Mardi Gras Ballroom Salons E, F, G & H (New Orleans Marriott)

Wednesday, January 8, 2014

Mardi Gras Ballroom Salons E, F, G & H (New Orleans Marriott)

William G. Tyson , University of Georgia Cooperative Extension

Jared R. Whitaker , University of Georgia

Guy D. Collins , University of Georgia

M. Brent Allen , UGA

Ronnie M. Barentine , University of Georgia

Eddie D. Beasley , UGA Cooperative Extension

D. Scott Carlson , University of Georgia

Don W. Clark , University of Georgia

Brian Lee Cresswell , University of Georgia

D. Shane Curry , University of Georgia

Michael A. Dollar , University of Georgia

R. Phillip Edwards , University of Georgia

W Jerome Ethredge , University of Georgia

Mark Freeman , University of Georgia - Pulaski County Extension

Mark A. Frye , University of Georgia

Thomas J. Hathorn , University of Georgia

Ray Hicks , University of Georgia

Brooke H. Jeffries , University of Georgia

Justin D. Lanier , University of Georgia - Crisp County

Jennifer T. Miller , University of Georgia

Daniel S. Price , University of Georgia - Cook County

Cliff M. Riner , University of Georgia

J. Peyton Sapp , University of Georgia

Pamela Sapp , University of Georgia

Justin S. Shealey , University of Georgia

Chris Tyson , UGA Cooperative Extension, Tattnall County

J. Larry Varnadoe , University of Georgia

Tim Varnedore , University of Georgia

The widespread existence of glyphosate-resistant Palmer amaranth has forced many cotton producers in Georgia to consider herbicide tolerance when making variety selection decisions. Liberty-based herbicide systems which involve the use of topical (POST) applications of glufosinate (Liberty) along with residual herbicides have been very effective and can be implemented on Liberty Link cotton cultivars, which have excellent tolerance to Liberty. Cotton cultivars with the WideStrike trait also have a gene with tolerance to Liberty; however, tolerance from this trait is less consistent and cotton injury can occur. Research was conducted in 2013 to assess variety performance of both Liberty Link and Phytogen cultivars with the WideStrike trait in on-farm, replicated variety trials. Varieties evaluated included FM 1944 GLB2, ST 4946 GLB2, ST 6448 GLB2, PHY 339 WRF, PHY 499 WRF, and PHY 575 WRF. Performance, with respect to lint yield and fiber quality was determined to provide producers with information to make informed decisions on variety selection when utilizing a Liberty-based herbicide system.