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Effects of Clethodim on Seedhead Density, Forage Yield, and Quality of Tall Fescue (Festuca arundinacea)

Published online by Cambridge University Press:  12 June 2017

John H. Reynolds ,
William A. Krueger  and
Cynthia L. Walker
John H. Reynolds
Affiliation:
Plant and Soil Sci. Dep., Univ. of Tennessee, Knoxville, TN 37901-1071
William A. Krueger
Affiliation:
Plant and Soil Sci. Dep., Univ. of Tennessee, Knoxville, TN 37901-1071
Cynthia L. Walker
Affiliation:
Plant and Soil Sci. Dep., Univ. of Tennessee, Knoxville, TN 37901-1071
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Abstract

Clethodim was applied to tall fescue to determine the effects of application timing (fall, early spring, mid-spring), rate (0, 5.6, 11.2, or 22.4 g ai ha−1), and use of crop oil (0 or 2.3 L ha−1) on seedhead density and forage yield and quality of tall fescue. Increasing the rate of clethodim or adding crop oil reduced seedhead density and forage yield, and generally improved forage quality. There was no effect of application date in 1988 and 1990, but seedhead density and forage yield decreased from the November to the March application date in 1989.

Keywords

Clethodim, (E,E)-(+)-2[1[[(3-chloro-2-propenyl)oxy]imino]propyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onetall fescue, Festuca arundinacea Schreb. ‘Kentucky 31’Plant growth regulatorsseedhead suppression
Type
Research
Information
Weed Technology , Volume 7 , Issue 3 , September 1993 , pp. 751 - 755
Copyright
Copyright © 1993 by the Weed Science Society of America 

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