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Economic Evaluations of Imazethapyr Rates and Timings on Rice

Published online by Cambridge University Press:  20 January 2017

Tyler P. Carlson ,
Eric P. Webster ,
Michael E. Salassi ,
Jason A. Bond ,
Justin B. Hensley  and
David C. Blouin
Tyler P. Carlson
Affiliation:
School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, 104 Sturgis Hall, Baton Rouge, LA 70803
Eric P. Webster*
Affiliation:
School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, 104 Sturgis Hall, Baton Rouge, LA 70803
Michael E. Salassi
Affiliation:
Department of Agricultural Economics and Agribusiness, Louisiana State University Agricultural Center, 101 Agricultural Administration Building, Baton Rouge, LA 70803
Jason A. Bond
Affiliation:
Delta Research and Extension Center, Mississippi Agricultural and Forestry Experiment Station, Stoneville, MS
Justin B. Hensley
Affiliation:
School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, 104 Sturgis Hall, Baton Rouge, LA 70803
David C. Blouin
Affiliation:
Department of Experimental Statistics, Louisiana State University Agricultural Center, 45 Agricultural Administration Building, Baton Rouge, LA 70803
*
Corresponding author's E-mail: ewebster@agcenter.lsu.edu
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Abstract

Field studies were conducted in Crowley, LA, and Stoneville, MS, in drill-seeded rice to evaluate economical returns of weed control with imazethapyr. Red rice and barnyardgrass control was evaluated with imazethapyr alone at various rates and application timings. Imazethapyr, averaged across rate, controlled red rice 89% and barnyardgrass 90% when the initial application of imazethapyr was applied at emergence followed by a second application of imazethapyr 2 wk later. No difference in red rice and barnyardgrass control was observed with imazethapyr, averaged across timing. Yield and economical returns were maximized when the initial application of imazethapyr was applied at rice emergence followed by a second application of imazethapyr 2 wk later.

Se realizaron estudios de campo en Crowley, Lousiana y Stoneville, Mississippi, para evaluar los beneficios económicos del control de malezas con imazethapyr en el cultivo del arroz sembrado a chorro corrido. Se evaluó el control de Oryza sativa y Echinochloa crus-galli con imazethapyr solo, a varias dosis y tiempos de aplicación. El imazethapyr, promediado de entre todas las dosis, controló O. sativa 89% y E. crus-galli 90% cuando la aplicación inicial del herbicida fue a la emergencia, seguida de una segunda aplicación dos semanas más tarde. No se observaron diferencias en el control de O. sativa y E. crus-galli con imazethapyr promediado entre todos los tiempos. El rendimiento y los beneficios económicos del arroz se maximizaron cuando la aplicación inicial de imazethapyr al cultivo fue a la emergencia del arroz, seguida por una segunda aplicación del mismo herbicida dos semanas después.

Keywords

Imazethapyrbarnyardgrass, Echinochloa crus-galli (L.) Beauvred rice, Oryza sativa L.rice, Oryza sativa L.Clearfield riceeconomicseconomic returnsherbicideweed control
Type
Weed Management—Major Crops
Information
Weed Technology , Volume 26 , Issue 1 , March 2012 , pp. 24 - 28
Copyright
Copyright © Weed Science Society of America 

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