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Influence of Selected Fungicides on Efficacy of Clethodim and Sethoxydim

Published online by Cambridge University Press:  20 January 2017

Sarah H. Lancaster
Affiliation:
Department of Crop Science, North Carolina State University, P.O. Box 7620, Raleigh, NC 27695-7620
David L. Jordan*
Affiliation:
Department of Crop Science, North Carolina State University, P.O. Box 7620, Raleigh, NC 27695-7620
Alan C. York
Affiliation:
Department of Crop Science, North Carolina State University, P.O. Box 7620, Raleigh, NC 27695-7620
Ian C. Burke
Affiliation:
Department of Crop Science, North Carolina State University, P.O. Box 7620, Raleigh, NC 27695-7620
Frederick T. Corbin
Affiliation:
Department of Crop Science, North Carolina State University, P.O. Box 7620, Raleigh, NC 27695-7620
Yvonna S. Sheldon
Affiliation:
Department of Crop Science, North Carolina State University, P.O. Box 7620, Raleigh, NC 27695-7620
John W. Wilcut
Affiliation:
Department of Crop Science, North Carolina State University, P.O. Box 7620, Raleigh, NC 27695-7620
David W. Monks
Affiliation:
Department of Horticultural Science, North Carolina State University, P.O. Box 7609, Raleigh, NC 27695-7609
*
Corresponding author's E-mail: david_jordan@ncsu.edu

Abstract

Field experiments were conducted to compare large crabgrass control by clethodim or sethoxydim applied alone and with selected fungicides registered for use in peanut. Fluazinam, propiconazole plus trifloxystrobin, or tebuconazole did not affect efficacy of clethodim or sethoxydim. Azoxystrobin, boscalid, chlorothalonil, and pyraclostrobin reduced efficacy of clethodim and sethoxydim in some experiments. Increasing the herbicide rate increased large crabgrass control regardless of the addition of chlorothalonil. In laboratory experiments, 14C absorption was less when 14C-clethodim or 14C-sethoxydim was applied with chlorothalonil. Pyraclostrobin and tebuconazole did not affect absorption of 14C-clethodim or 14C-sethoxydim.

Type
Research Article
Copyright
Copyright © Weed Science Society of America 

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