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Use of Imazosulfuron in Herbicide Programs for Drill-Seeded Rice (Oryza sativa) in the Mid-South United States

Published online by Cambridge University Press:  20 January 2017

Dilpreet S. Riar  and
Jason K. Norsworthy
Dilpreet S. Riar*
Affiliation:
Department of Crop, Soil, and Environmental Sciences, University of Arkansas, 1366 West Altheimer Drive, Fayetteville, AR 72704
Jason K. Norsworthy
Affiliation:
Department of Crop, Soil, and Environmental Sciences, University of Arkansas, 1366 West Altheimer Drive, Fayetteville, AR 72704
*
Corresponding author's E-mail: [email protected]
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Abstract

Research was conducted in 2009 and 2010 to evaluate influence of imazosulfuron rate and application timing on weed control in drill-seeded rice at Stuttgart, AR, and to evaluate imazosulfuron-containing herbicide programs in drill-seeded rice at Keiser and Stuttgart, AR. Weed species evaluated included barnyardgrass, broadleaf signalgrass, hemp sesbania, and yellow nutsedge. Imazosulfuron applied at 224 and 336 g ai ha−1 during PRE, early POST (EPOST), or preflood (PREFLD) growth periods provided similar control of all weeds. Imazosulfuron applied EPOST or PREFLD controlled hemp sesbania and yellow nutsedge ≥ 93% both years at 5 and 7 wk after planting (WAP), except in 2009 when hemp sesbania control was ≤ 79% at 7 WAP. In 2010, because of inadequate rainfall, hemp sesbania and yellow nutsedge control with PRE-applied imazosulfuron was ≤29% at 5 and 7 WAP. Imazosulfuron plus clomazone PRE followed by (fb) quinclorac plus propanil EPOST and imazosulfuron plus quinclorac EPOST fb thiobencarb plus propanil PREFLD programs controlled hemp sesbania and barnyardgrass (in at least two site-years), and yellow nutsedge and broadleaf signalgrass (in at least one site-year) greater than or equal to clomazone plus quinclorac PRE fb propanil plus halosulfuron PRELD (standard program). No rice injury was observed with any herbicide program. Rice yield with all imazosulfuron-containing herbicide programs (6,630 to 8,130 kg ha−1) was similar to the standard herbicide program (7,240 kg ha−1). Imazosulfuron in mixture with clomazone, propanil, or quinclorac can be incorporated into herbicide programs of mid-South rice production for the control of broadleaf weeds and sedges.

En 2009 y 2010 se realizó una investigación para evaluar la influencia de la dosis y el momento de aplicación de imazosulfuron en el control de malezas en el cultivo de arroz sembrado en líneas en Stuttgart, AR, y también para evaluar los programas que utilizan este mismo herbicida en arroz sembrado de la misma manera en Keiser y Stuttgart, AR. Las especies de maleza evaluadas incluyeron Echinochloa crus-galli, Urochloa platyphylla, Sesbania herbacea y Cyperus esculentus. Imazosulfuron aplicado a 224 y 336 g ia ha−1 durante PRE, POST-temprana (EPOST), o antes de la inundación (PREFLD) proporcionó control similar de todas las malezas. Imazosulfuron aplicado EPOST o PREFLD controló S. herbacea C. esculentus ≥93% en ambos años a las 5 y 7 semanas después de la siembra (WAP), excepto en 2009 cuando el control de S. herbacea fue ≤79% a las 7 WAP. En 2010, debido a la escasez de lluvias, el control de S. herbacea y C. esculentus con imazosulfuron aplicado PRE fue ≤29% a las 5 y 7 WAP. Los programas en que se aplicó imazosulfuron más clomazone en PRE seguido de (fb) quinclorac más propanil en EPOST e imazosulfuron más quinclorac en EPOST fb thiobencarb más propanil en PREFLD, controlaron S. herbacea y E. crus-galli (en al menos dos años/sitio), y C. esculentus y U. platyphylla (en al menos un año/sitio) mejor o igual al clomazone más quinclorac PRE fb propanil más halosulfuron PREFLD (programa estándar). No se observó daño en el arroz con ninguno de los programas de herbicidas. El rendimiento del arroz en todos los programas de herbicidas con imazosulfuron (6630 a 8130 kg ha−1) fue similar al programa de herbicidas estándar (7240 kg ha−1). Imazosulfuron mezclado con clomazone, propanil, o quinclorac puede ser incorporado a los programas de herbicidas para la producción de arroz en la región Sur-Media para el control de malezas de hoja ancha y cyperáceas.

Keywords

Clomazonehalosulfuronimazosulfuronpropanilquincloracthiobencarbbarnyardgrass, Echinochloa crus-galli (L.) P. Beauvbroadleaf signalgrass, Urochloa platyphylla (Griseb.) Nashhemp sesbania, Sesbania herbacea (P. Mill.) McVaughyellow nutsedge, Cyperus esculentus L.rice, Oryza sativa L.Herbicide programsresidual weed controlriceV-10142
Type
Weed Management—Major Crops
Information
Weed Technology , Volume 25 , Issue 4 , December 2011 , pp. 548 - 555
Copyright
Copyright © Weed Science Society of America 

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