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Utilization of Saflufenacil in a Clearfield® Rice (Oryza sativa) System

Published online by Cambridge University Press:  20 January 2017

Garret B. Montgomery ,
Jason A. Bond ,
Bobby R. Golden ,
Jeffrey Gore ,
H. Matthew Edwards ,
Thomas W. Eubank  and
Timothy W. Walker
Garret B. Montgomery
Affiliation:
Delta Research and Extension Center, Mississippi State University, Stoneville, MS 38776
Jason A. Bond*
Affiliation:
Delta Research and Extension Center, Mississippi State University, Stoneville, MS 38776
Bobby R. Golden
Affiliation:
Delta Research and Extension Center, Mississippi State University, Stoneville, MS 38776
Jeffrey Gore
Affiliation:
Delta Research and Extension Center, Mississippi State University, Stoneville, MS 38776
H. Matthew Edwards
Affiliation:
Delta Research and Extension Center, Mississippi State University, Stoneville, MS 38776
Thomas W. Eubank
Affiliation:
Delta Research and Extension Center, Mississippi State University, Stoneville, MS 38776
Timothy W. Walker
Affiliation:
Delta Research and Extension Center, Mississippi State University, Stoneville, MS 38776
*
Corresponding author's E-mail: [email protected].
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Abstract

Research was conducted in Mississippi in 2012 and 2013 to compare the efficacy of saflufenacil to other broadleaf herbicides applied in mixtures with imazethapyr in a Clearfield rice system. Saflufenacil at 50 g ai ha−1, carfentrazone at 35 g ai ha−1, a prepackaged mixture of halosulfuron plus thifensulfuron at 35 plus 4 g ai ha−1, and a prepackaged mixture of propanil plus thiobencarb at 2,240 plus 2,240 g ai ha−1 were applied in mixture with imazethapyr at 70 g ai ha−1 early-POST (EPOST) to rice in the one- to two-leaf stage or late-POST (LPOST) to rice in the four-leaf to one-tiller stage. No differences in injury among the broadleaf herbicides or between application timings were detected at any evaluation. Imazethapyr combined with propanil plus thiobencarb or saflufenacil provided the greatest control of barnyardgrass 7 and 14 d after treatment (DAT). Hemp sesbania, ivyleaf morningglory, and Palmer amaranth control was greatest and similar for imazethapyr combined with carfentrazone, propanil plus thiobencarb, and saflufenacil; however, rough rice yield was greatest for imazethapyr combined with propanil plus thiobencarb or saflufenacil. Propanil plus thiobencarb or saflufenacil can be used in a Clearfield rice system to achieve optimum weed control and highest rice yields.

En 2012 y 2013 se realizó una investigación en Mississippi, para comparar la eficacia de saflufenacil con la de otros herbicidas para malezas de hoja ancha aplicados en mezcla con imazethapyr, en sistemas de arroz Clearfield. Se aplicó saflufenacil a 50 g ai ha−1, carfentrazone a 35 g ai ha−1, y una mezcla de pre-empacada de propanil más thiobencarb a 2,240 más 2,240 g ai ha−1, en mezcla con imazethapyr a 70 g ai ha−1, en POST temprano (EPOST) a arroz en el estadio de una a dos hojas o en POST tardío (LPOST) a arroz en el estadio de cuatro hojas al primer hijuelo. No se detectaron diferencias en daño entre los herbicidas para hoja ancha ni entre momentos de aplicación en ninguna de las evaluaciones. Imazethapyr combinado con propanil más thiobencarb o saflufenacil brindó el mayor control de Echinochloa crus-galli 7 y 14 d después del tratamiento (DAT). El control de Sesbania herbacea, Ipomoea hederacea, y Amaranthus palmeri fue mayor o similar para imazethapyr combinado con carfentrazone, propanil más thiobencarb, y saflufenacil. Sin embargo, el rendimiento del arroz en granza fue mayor para imazethapyr combinado con propanil más thiobencarb o saflufenacil. Propanil más thiobencarb o saflufenacil puede ser usado en sistemas de arroz Clearfield para alcanzar un control de malezas óptimo y los mayores rendimientos del arroz.

Keywords

Carfentrazonehalosulfuronimazethapyrpropanilsaflufenacilthifensulfuronthiobencarbbarnyardgrass, Echinochloa crus-galli (L.) Beauv ECHCGhemp sesbania, Sesbania herbacea (P. Mill.) McVaugh SEBEXivyleaf morningglory, Ipomoea hederacea (L.) Jacq. IPOHEPalmer amaranth, Amaranthus palmeri S. Wats AMAPArice, Oryza sativa L. ‘CL151’Application timingherbicide combinationsimidazolinone-resistant ricetank mixture
Type
Research Article
Information
Weed Technology , Volume 29 , Issue 2 , June 2015 , pp. 255 - 262
Copyright
Copyright © Weed Science Society of America 

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