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Low Volume Invert Emulsions for Purple Nutsedge (Cyperus rotundus) Control

Published online by Cambridge University Press:  12 June 2017

Charles T. Bryson,
Gene D. Wills and
Paul C. Quimby
Charles T. Bryson
Affiliation:
USDA/ARS, South. Weed Sci. Lab., Stoneville, MS 38776
Gene D. Wills
Affiliation:
Delta Branch, Miss. Agric. For. Exp. Stn., Stoneville, MS 38776
Paul C. Quimby
Affiliation:
USDA/ARS, Rangeland Weeds Lab., Bozeman, MT 59717
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Abstract

Greenhouse experiments were conducted in 1989 at Stoneville, MS to evaluate the efficacy of fluridone and MSMA applied at 0.3 and 1.0 kg ai ha-1, respectively, either alone or in combination and with or without 0.1 M ammonium sulfate on purple nutsedge. The herbicides were applied at 19 L ha-1 in an oil-water, invert emulsion (low-volume) and at 187 L ha-1 in water with a nonionic surfactant (0.25% v/v) (high-volume). Purple nutsedge control with both herbicides alone or in combination was greater with the low-volume than with the high-volume application. Addition of MSMA to fluridone, or of ammonium sulfate to fluridone plus MSMA did not enhance purple nutsedge control over fluridone alone applied in low volume. The addition of ammonium sulfate to fluridone alone applied in low volume reduced purple nutsedge control.

Keywords

Fluridone, 1-methyl-3-phenyl-5-[3-(trifluoromethyl)phenyl]-4(1H)-pyridinoneMSMA, monosodium salt of methylarsonic acidpurple nutsedge, Cyperus rotundus L. ♯3 CYPROHerbicide efficacyapplication volumeCYPRO

Information

Type
Notes
Information
Weed Technology , Volume 4 , Issue 4 , December 1990, pp. 907 - 909
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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