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Response of Commercial Rice Cultivars to Postemergence Applications of Saflufenacil

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: jbond@drec.msstate.edu.
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Abstract

Research was conducted in 2012 and 2013 to evaluate the response of the rice cultivars ‘Cheniere', ‘CL151′, ‘Caffey', ‘CL261′, and ‘CLXL745′ response to POST applications of saflufenacil. Treatments included a nontreated control, saflufenacil at 50 g ai ha−1, and carfentrazone at 35 g ai ha−1 applied mid-POST (MPOST) to rice in the three- to four-leaf stage. Pooled across cultivars, injury was greatest at 3 and 7 d after treatment (DAT), 21 and 17%, respectively. Rice injury was only 5% at 14 DAT and 1% at 28 DAT. Hybrid long-grain cultivar CLXL745 was injured more than inbred long-grain cultivars CL151 and Cheniere. Cheniere was more tolerant than inbred medium-grain cultivars CL261 and Caffey. All cultivars exhibited tolerance to saflufenacil as evidenced by similar normalized difference vegetative index (NDVI), maturity, mature plant height, and rice yield (rough, whole, and total milled rice).

Se realizó un investigación en 2012 y 2013 para evaluar la respuesta de los cultivares de arroz ‘Cheniere', ‘CL151′, ‘Caffey', ‘CL261′, and ‘CLXL745′ a aplicaciones POST de saflufenacil. Los tratamientos incluyeron un testigo no-tratado, saflufenacil a 50 g ai ha−1, y carfentrazone a 35 g ai ha−1 aplicados en POST intermedio (MPOST) a arroz en los estadios de tres a cuatro hojas. Promediando los cultivares, el daño fue mayor a 3 y 7 d después del tratamiento (DAT), 21 y 17%, respectivamente. El daño en el arroz fue solamente 5% a 14 DAT y 1% a 28 DAT. El cultivar híbrido de grano largo CLXL745 sufrió más daño que los cultivares autofecundados de grano largo CL151 y Cheniere. Cheniere fue más tolerante que el cultivar autofecundado de grano mediano CL261 y Caffey. Todos los cultivares presentaron tolerancia a saflufenacil como se evidenció al obtener valores similares del índice de diferencia de vegetación normalizada (NDVI), madurez, altura de planta madura, y rendimiento del arroz (en granza, entero, y total pulido).

Keywords

Carfentrazonesaflufenacilrice, Oryza sativa L.Differential susceptibilityherbicide tolerancehybrid ricenormalized difference vegetative index
Type
Research Article
Information
Weed Technology , Volume 28 , Issue 4 , December 2014 , pp. 679 - 684
Copyright
Copyright © Weed Science Society of America 

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