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Silver Beardgrass (Andropogon saccharoides) Control on Highway Rights-of-Way

Published online by Cambridge University Press:  12 June 2017

Thomas J. Samples,
Lonnie M. Cargill and
A. Douglas Brede
Thomas J. Samples
Affiliation:
Dep. Hortic and Landscape Arch., Oklahoma State Univ., Stillwater, OK 74078
Lonnie M. Cargill
Affiliation:
Dep. Hortic and Landscape Arch., Oklahoma State Univ., Stillwater, OK 74078
A. Douglas Brede
Affiliation:
Dep. Hortic and Landscape Arch., Oklahoma State Univ., Stillwater, OK 74078
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Abstract

Foliar-applied herbicides were evaluated in one greenhouse and five field studies for control of silver beardgrass (Andropogon saccharoides Swartz. # ANOSA). In the greenhouse, terbutryn [N-(1,1-dimethylethyl)-N′-ethyl-6-(methylthio)-1,3,5-triazine-2,4-diamine] and the isopropylamine salt of glyphosate [N-(phosphonomethyl) glycine] at 3.4 kg ai/ha each consistently controlled silver beardgrass from 7 to 75 days after treatment. Field studies were conducted to investigate silver beardgrass control as influenced by herbicides and timing of herbicide application. Generally, glyphosate at 1.1 and 1.7 kg/ha satisfactorily controlled silver beardgrass with little or no permanent damage to the existing bermudagrass [Cynodon dactylon (L.) Pers. # CYNDA] turf. Decreasing water carrier volume from 374 to 187 L/ha did not affect phytoactivity of terbutryn at 3.4 kg/ha or glyphosate at 0.4, 0.6, 0.8, or 1.1 kg/ha.

Keywords

Phytotoxicitycarrier volumesurfactantdiuronglyphosatehexazinoneterbutrynANOSACYNDA

Information

Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 35 , Issue 1 , January 1987, pp. 123 - 126
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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