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1 April 2013 Interference and Control of Glyphosate-Resistant and -Susceptible Palmer Amaranth (Amaranthus palmeri) Populations under Greenhouse Conditions
Aman Chandi, David L. Jordan, Alan C. York, Susana R. Milla-Lewis, James D. Burton, A. Stanley Culpepper, Jared R. Whitaker
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Abstract

Interference for 40 d after emergence (DAE) of corn, cotton, peanut, and snap bean by four glyphosate-resistant (GR) and four glyphosate-susceptible (GS) Palmer amaranth populations from Georgia and North Carolina was compared in the greenhouse. Greater interference from Palmer amaranth, measured as crop height and fresh weight reduction, was noted in cotton and peanut compared with corn or snap bean. Crop height 15 to 40 DAE was reduced similarly by GR and GS populations. Crop fresh weight, however, was reduced 25 and 19% in the presence of GS and GR populations, respectively. Measured as percent reduction in fresh weight, GR and GS populations of Palmer amaranth were controlled similarly by glufosinate, lactofen, paraquat, and trifloxysulfuron applied POST. Atrazine and dicamba controlled GR populations more effectively than GS populations.

Nomenclature: Atrazine; dicamba; glufosinate; lactofen; paraquat; trifloxysulfuron; Palmer amaranth, Amaranthus palmeri S. Wats.; corn, Zea mays L.; cotton, Gossypium hirsutum L.; peanut, Arachis hypogaea L..; snap bean, Phaseolus vulgaris L.

Weed Science Society of America
Aman Chandi, David L. Jordan, Alan C. York, Susana R. Milla-Lewis, James D. Burton, A. Stanley Culpepper, and Jared R. Whitaker "Interference and Control of Glyphosate-Resistant and -Susceptible Palmer Amaranth (Amaranthus palmeri) Populations under Greenhouse Conditions," Weed Science 61(2), 259-266, (1 April 2013). https://doi.org/10.1614/WS-D-12-00063.1
Received: 23 April 2012; Accepted: 1 October 2012; Published: 1 April 2013
JOURNAL ARTICLE
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Population response to herbicides
Weed interference
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