%0 Journal Article %T Efficacy of Selected Herbicide Programs in 2,4-D Tolerant Cotton (<i>Gossypium hirsutum</i> L.) %A Colton H. Sanders %A Dwayne D. Joseph %A Michael W. Marshall %J Agricultural Sciences %P 1157-1167 %@ 2156-8561 %D 2017 %I Scientific Research Publishing %R 10.4236/as.2017.810084 %X
The use of transgenic crops has grown significantly over the past couple of decades. Many agronomic crops produced today are tolerant to glyphosate. Glyphosate-tolerant crops were commercially introduced in 1996, and, about nine years later, glyphosate-resistant Palmer amaranth was confirmed in Georgia. Glyphosate-resistant weeds arose from reliance on postemergence only glyphosate programs to control weeds in crops. New transgenic traits for glufosinate and 2,4-D choline have been developed, and evaluations of stacked traits and concurrent use of multiple herbicides have provided additional tools in the management of glyphosate-resistant weeds. Field experiments were conducted in 2012 and 2013 at the Edisto Research and Education Center near Blackville, SC, USA to determine the efficacy of 2,4-D-based herbicide programs in transgenic cotton tolerant to 2,4-D choline, glyphosate, and glufosinate. The treatments provided good to excellent Palmer amaranth and pitted morningglory control in 2012 and 2013. Seed cotton yields across treatments ranged from 0 to 2057 kg ha-1. This new trait technology package in cotton permits in-season postemergence use of 2,4-D choline, a herbicide mode of action not previously used postemergence in cotton, which can control resistant weeds, including Palmer amaranth if applied at the proper growth stage.
%K Glyphosate %K 2 %K 4-D Tolerant Cotton %K Resistant Weeds %K Glufosinate %K 2 %K 4-D Choline %K Weed Control %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=79918