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Response of Oat (Avena sativa) Varieties and Wild Radish (Raphanus raphanistrum) to Thifensulfuron plus Tribenuron

Published online by Cambridge University Press:  12 June 2017

David W. Fischer ,
R. Gordon Harvey ,
Edward S. Oplinger  and
Timothy S. Maloney
David W. Fischer*
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706
R. Gordon Harvey
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706
Edward S. Oplinger
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706
Timothy S. Maloney
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706
*
Corresponding author's E-mail: dwfischer@students.wisc.edu.
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Abstract

Field studies evaluated wild radish control in oat with thifensulfuron plus tribenuron in 1995 and 1997. Thifensulfuron plus tribenuron at 16 or 21 g ai/ha controlled wild radish completely in both years. In tolerance studies conducted in 1995 and 1996, thifensulfuron plus tribenuron reduced vigor of ‘Bay,’ ‘Belle,’ ‘Dane,’ ‘Ensiler,’ ‘Gem,’ ‘Horicon,’ ‘Ogle,’ ‘Porter,’ and ‘Prairie’ oat varieties and Wisconsin test selection oat ‘X6396-1’ up to 25% 7 d after treatment (DAT), but all chlorotic symptoms had disappeared 28 DAT. Thifensulfuron plus tribenuron reduced oat height 13 to 19% in 1995 and 21 to 24% in 1996 7 DAT. Bay, Belle, Dane, Ensiler, Horicon, Prairie, and X6396-1 recovered from height reductions by 28 DAT in 1995; however, in 1996 only Horicon and Porter recovered. Thifensulfuron plus tribenuron did not reduce 1995 grain yields, but 1996 Bay and Porter grain yields were reduced 29 and 15%, respectively. Dane and Prairie seed weights were reduced 7 and 14%, respectively, in 1995, whereas no seed weight reduction occurred in 1996.

Keywords

Thifensulfuron, 3-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]-2-thiophenecarboxylic acidtribenuron, 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)methylamino]carbonyl]amino]sulfonyl]benzoicacidwild radish, Raphanus raphanistrum L. # RAPRAoat, Avena sativa L., Bay, Belle, Dane, Ensiler, Gem, Horicon, Ogle, Porter, Prairie, X6396-1Herbicide toleranceyieldsulfonylurea2,4-DMCPADAT, days after treatment
Type
Research
Information
Weed Technology , Volume 13 , Issue 1 , March 1999 , pp. 144 - 150
Copyright
Copyright © 1999 by the Weed Science Society of America 

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