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Herbicides for Renovation of Pastures and Control of Tall Ironweed (Vernonia altissima)

Published online by Cambridge University Press:  12 June 2017

E. J. Peters  and
S. A. Lowance
E. J. Peters
Affiliation:
Sci. Ed. Admin., Columbia, MO 65211
S. A. Lowance
Affiliation:
Sci. Ed. Admin., Columbia, MO 65211
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Abstract

August and October applications of glyphosate [N-(phosphonomethyl)glycine] and paraquat (1,1′-dimethyl-4,4′-bipyridinium ion) were compared at two rates for pasture renovation. During the 2 yr of the experiment, sod suppression was frequently greater with October applications than with August applications. Medium red clover (Trifolium pratense L.) became established in all the plots, and density and yield tended to increase as grass suppression increased.

Glyphosate was compared over a 3-yr period with an ester of 2,4-D [(2,4-dichlorophenoxy)acetic acid] and picloram (4-amino-3,5,6-trichloropicolinic acid) for control of tall ironweed (Vernonia altissima Nutt.) when applied in August. Picloram killed from about 80 to 100% of the tall ironweed plants and was superior to 2,4-D. Glyphosate was inconsistent for controlling tall ironweed but could be used for killing perennial weeds as well as sod suppression.

Keywords

Festuca arundinaceaPoa pratensisAgrostis albaglyphosate2,4-Dpicloram
Type
Research Article
Information
Weed Science , Volume 27 , Issue 3 , May 1979 , pp. 342 - 345
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

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