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Sulfentrazone and Carfentrazone Accelerate Broadleaf Weed Control with Metsulfuron

Published online by Cambridge University Press:  20 January 2017

James T. Brosnan ,
Gregory K. Breeden ,
Gerald M. Henry  and
Franklin R. Walls
James T. Brosnan*
Affiliation:
Department of Plant Sciences, University of Tennessee, 252 Ellington Plant Science Building, 2431 Joe Johnson Drive, Knoxville, TN 37996
Gregory K. Breeden
Affiliation:
Department of Plant Sciences, University of Tennessee, 252 Ellington Plant Science Building, 2431 Joe Johnson Drive, Knoxville, TN 37996
Gerald M. Henry
Affiliation:
Texas Tech University, 15th and Detroit, Room 259, Mail Stop 2122, Lubbock, TX 79409
Franklin R. Walls
Affiliation:
FMC Corporation, 501 Parkwood Lane, Goldsboro, NC 27530
*
Corresponding author's E-mail: jbrosnan@utk.edu
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Abstract

Ground ivy and khakiweed are troublesome broadleaf weeds of warm-season turfgrass. Field studies were conducted in Tennessee (TN) and Texas (TX) from 2008 to 2010 to evaluate the efficacy of sulfentrazone plus metsulfuron and carfentrazone plus metsulfuron tank mixtures compared with metsulfuron alone for control of ground ivy and khakiweed. In TN, sulfentrazone plus metsulfuron and carfentrazone plus metsulfuron provided accelerated control of ground ivy compared with metsulfuron alone. Over a 2-yr period, ground ivy control with metsulfuron at 10, 21, and 42 g ai ha−1 ranged from 0 to 5% 7 d after treatment (DAT) and 12 to 60% 14 DAT. Ground ivy control with mixtures of sulfentrazone plus metsulfuron ranged from 40 to 72% 7 DAT and 87 to 100% 14 DAT. Similarly, carfentrazone plus metsulfuron controlled ground ivy 5 to 32% 7 DAT and 23 to 93% 14 DAT. In TX, carfentrazone plus metsulfuron and sulfentrazone plus metsulfuron controlled khakiweed greater than metsulfuron alone 7 and 14 DAT as well. Few differences in ground ivy and khakiweed control were detected 56 DAT because metsulfuron applied alone at 21 g ai ha−1 controlled both weeds > 77%, similar to each mixture. These data indicate that when applied in mixtures, sulfentrazone and carfentrazone accelerate ground ivy and khakiweed control with metsulfuron but do not affect long-term efficacy.

Glechoma hederacea y Alternanthera pungens son malezas problemáticas de hoja ancha en céspedes de época cálida. En 2008 y 2010 se realizaron estudios de campo en Tennessee (TN) y Texas (TX) para evaluar la eficacia de mezclas en tanque de sulfentrazone más metsulfuron y carfentrazone más metsulfuron, comparadas con solo metsulfuron, para el control de G. hederacea y A. pungens. En TN, sulfentrazone más metsulfuron y carfentrazone más metsulfuron proporcionaron un control acelerado de G. hederacea en comparación con metsulfuron solo. A lo largo de un período de dos años, el control de G. hederacea con metsulfuron a 10, 21 y 42 g ia ha−1 varió de 0 a 5% 7 días después del tratamiento (DAT) y de 12 a 60% 14 DAT. El control de G. hederacea con mezclas de sulfentrazone más metsulfuron varió de 40 a 72% 7 DAT y de 87 a 100% 14 DAT. Similarmente, carfentrazone más metsulfuron controlaron la G. hederacea de 5 a 32% 7 DAT y de 23 a 93% 14 DAT. En TX, carfentrazone más metsulfuron y sulfentrazone más metsulfuron controlaron A. pungens mejor que metsulfuron por sí solo, también a los 7 y 14 DAT. Pocas diferencias en el control de G. hederacea y A. pungens fueron detectas a los 56 DAT, mientras metsulfuron aplicado sólo a 21 g ia ha−1 controló ambas malezas >77%, similar al control con cada mezcla. Estos datos indican que cuando se aplican en mezclas con metsulfuron, sulfentrazone y carfentrazone aceleran el control de G. hederacea y A. pungens pero no afectan su eficacia a largo plazo.

Keywords

Carfentrazonemetsulfuronsulfentrazoneground ivy, Glechoma hederacea L.khakiweedAlternanthera pungens KunthEfficacygolf coursepostemergence herbicidestank mixturesturfturfgrass
Type
Notes
Information
Weed Technology , Volume 26 , Issue 3 , September 2012 , pp. 549 - 553
Copyright
Copyright © Weed Science Society of America 

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