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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
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

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.

Type
Research
Copyright
Copyright © 1993 by the Weed Science Society of America 

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