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Oat and Rye Tolerance to Mesosulfuron and Tribenuron

Published online by Cambridge University Press:  20 January 2017

Andrew W. MacRae ,
A. Stanley Culpepper  and
Timothy L. Grey
Andrew W. MacRae*
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, P.O. Box 1209, Tifton, GA 31793
A. Stanley Culpepper
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, P.O. Box 1209, Tifton, GA 31793
Timothy L. Grey
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, P.O. Box 1209, Tifton, GA 31793
*
Corresponding author's E-mail: awmacrae@uga.edu
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Abstract

The affect of mesosulfuron and tribenuron applied POST to oat and rye was determined at three locations in Georgia during 2004 and 2005. Five herbicide treatments were applied to oat and rye in Feekes scale (FS) 1.2 or 2 developmental stage. Herbicide treatments consisted of tribenuron at 13 or 26 g ai/ha, tribenuron at 13 g/ha plus MCPA at 561 g ai/ha, MCPA at 561 g/ha, and mesosulfuron at 15 g ai/ha. Tribenuron, MCPA, and tribenuron plus MCPA injured both crops less than 4% and did not affect grain yield. Mesosulfuron applied to rye in FS 1.2 injured the crop 36% at 2 wk after treatment (WAT), 12% at 5 WAT, and 0% at harvest. Mesosulfuron applied at FS 2 injured rye less than 9%. Mesosulfuron did not influence rye-grain yield with either application timing. Mesosulfuron injured oat 65 to 86% at 5 WAT and reduced yield at least 70% regardless of application timing.

Keywords

MCPAmesosulfuron-methyltribenuron-methyloat, Avena sativa L. ‘Horizon 32’rye, Secale cereale L. ‘Wrens 96’Injuryyield
Type
Research
Information
Weed Technology , Volume 21 , Issue 4 , December 2007 , pp. 938 - 940
Copyright
Copyright © Weed Science Society of America 

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