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International Journal of Agronomy
Volume 2012 (2012), Article ID 951454, 10 pages
http://dx.doi.org/10.1155/2012/951454
Research Article

Weed Control and Grain Sorghum (Sorghum bicolor) Tolerance to Pyrasulfotole plus Bromoxynil

1Texas AgriLife Extension Service, Corpus Christi, TX 78406, USA
2Texas AgriLife Research and Texas AgriLife Extension Service, Lubbock, TX 79403, USA
3Texas AgriLife Research, Corpus Christi, TX 78102, USA
4Texas AgriLife Research, Corpus Christi, TX 78406, USA

Received 18 July 2012; Accepted 8 October 2012

Academic Editor: David Clay

Copyright © 2012 Dan D. Fromme et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Field studies were conducted during the 2008 and 2009 growing seasons at five locations in the Texas grain sorghum producing regions to evaluate pyrasulfotole plus bromoxynil combinations for weed control and grain sorghum response. All pyrasulfotole plus bromoxynil combinations controlled Amaranthus palmeri, Cucumis melo, and Proboscidea louisianica at least 94% while control of Urochloa texana was never better than 69%. Pyrasulfotole plus bromoxynil combinations did result in early season chlorosis and stunting; however, by the end of the growing season no visual injury or stunting differences were noted when compared to the untreated check. Early season grain sorghum chlorosis and stunting with pyrasulfotole plus bromoxynil combinations did not affect grain sorghum yields with the exception of pyrasulfotole at 0.03 kg ai/ha plus bromoxynil at 0.26 kg ai/ha plus atrazine at 0.58 kg ai/ha applied early postemergence followed by pyrasulfotole plus bromoxynil applied mid-postemergence which reduced yield at one of two locations in 2008. Grain sorghum yield increased following all pyrasulfotole plus bromoxynil treatments compared to the untreated check in 2009.