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1 August 2015 Weed Management in Corn with Postemergence Applications of Tembotrione or Thiencarbazone : Tembotrione
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Abstract

Four field experiments were conducted in Louisiana and Mississippi in 2009 and 2010 to evaluate POST herbicides treatments with tembotrione applied alone or as a prepackaged mixture with thiencarbazone for weed control in corn. Treatments included tembotrione at 92 g ai ha−1, thiencarbazone : tembotrione at 15 : 76 g ai ha−1, atrazine at 2,240 g ai ha−1, glufosinate at 450 g ai ha−1, glyphosate at 860 g ae ha−1, and coapplications of tembotrione or thiencarbazone : tembotrione with atrazine, glufosinate, or glyphosate. All treatments were applied to 26-cm corn in the V4 growth stage. Treatments containing thiencarbazone : tembotrione and those with tembotrione controlled barnyardgrass, browntop millet, entireleaf morningglory, hophornbeam copperleaf, johnsongrass, Palmer amaranth, and velvetleaf 85 to 96% and 43 to 97% 28 d after treatment and at corn harvest, respectively. Corn yield ranged from 9,200 to 10,420 kg ha−1 and was greater than the nontreated control following all herbicide treatments, except atrazine alone. Results indicated that thiencarbazone : tembotrione or tembotrione POST is an option for weed management in corn, and applications of thiencarbazone : tembotrione would be strongly encouraged where rhizomatous johnsongrass is problematic.

Nomenclature: Atrazine; glufosinate; glyphosate; tembotrione; thiencarbazone; barnyardgrass, Echinochloa crus-galli (L.) Beauv. ECHCG; browntop millet, Urochloa ramosa (L.) Nguyen PANRA; entireleaf morningglory, Ipomoea hederacea var. integriuscula Gray IPOHG; hophornbeam copperleaf, Acalypha ostryifolia Riddell ACCOS; johnsongrass, Sorghum halepense (L.) Pers. SORHA; Palmer amaranth, Amaranthus palmeri S. Wats AMAPA; velvetleaf, Abutilon theophrasti Medik ABUTH; corn, Zea mays L. ZEAMX.

Se realizaron cuatro experimentos de campo en Lousiana y Mississippi en 2009 y 2010 para evaluar tratamientos de herbicidas POST con tembotrione aplicado solo o en mezcla pre-empacada con thiencarbazone para el control de malezas en maíz. Los tratamientos incluyeron tembotrione a 92 g ai ha−1, thiencarbazone:tembotrione a 15:76 g ai ha−1, atrazine a 2,240 g ai ha−1, glufosinate a 450 g ai ha−1, glyphosate a 860 g ae ha−1, y co-aplicaciones de tembotrione o thiencarbazone:tembotrione con atrazine, glufosinate, o glyphosate. Todos los tratamientos fueron aplicados a maíz de 26 cm en el estado de crecimiento V4. Los tratamientos que contenían thiencarbazone:tembotrione y aquellos con tembotrione controlaron Echinochloa crus-galli, Urochloa ramosa, Ipomoea hederacea var. integriuscula, Acalypha ostryifolia, Sorghum halepense, Amaranthus palmeri, y Abutilon theophrasti 85 a 96% y 43 a 97% 28 d después del tratamiento y al momento de la cosecha del maíz, respectivamente. El rendimiento del cultivo varió de 9,200 a 10,420 kg ha−1 y fue mayor que el testigo sin tratamiento en todos los tratamientos con herbicidas, con la excepción de solo atrazine. Los resultados indicaron que thiencarbazone:tembotrione o tembotrione POST es una opción para el manejo de malezas en maíz, y aplicaciones de thiencarbazone:tembotrione serían altamente recomendadas donde S. halepense con rizomas es problemático.

Daniel O. Stephenson, Jason A. Bond, Randall L. Landry, and H. Matthew Edwards "Weed Management in Corn with Postemergence Applications of Tembotrione or Thiencarbazone : Tembotrione," Weed Technology 29(3), 350-358, (1 August 2015). https://doi.org/10.1614/WT-D-14-00104.1
Received: 21 August 2014; Accepted: 1 February 2015; Published: 1 August 2015
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