Interference and Control of Glyphosate-Resistant and -Susceptible Palmer Amaranth (Amaranthus palmeri) Populations under Greenhouse Conditions

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...

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Bibliographic Details
Published in:Weed science 2013-04, Vol.61 (2), p.259-266
Main Authors: Chandi, Aman, Jordan, David L., York, Alan C., Milla-Lewis, Susana R., Burton, James D., Culpepper, A. Stanley, Whitaker, Jared R.
Format: Article
Language:English
Subjects:
Amaranth
Amaranthus palmeri
Arachis hypogaea
Atrazine
Beans
Biological and medical sciences
Chemical control
Competition
Corn
Cotton
Crops
Depopulation
dicamba
Flowers & plants
Fundamental and applied biological sciences. Psychology
glufosinate
Gossypium hirsutum
green beans
Greenhouses
Herbicide resistance
Herbicides
lactofen
Paraquat
Parasitic plants. Weeds
Peanuts
Phaseolus vulgaris
Phytopathology. Animal pests. Plant and forest protection
Plants
Population response to herbicides
Seeds
trifloxysulfuron
Vegetables
WEED BIOLOGY AND ECOLOGY
weed interference
weed science
Weeds
weight loss
Zea mays
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Summary: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.
ISSN:0043-1745
1550-2759
DOI:10.1614/WS-D-12-00063.1