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Purple Nutsedge (Cyperus rotundus) Control in Reduced-Tillage Cotton (Gossypium hirsutum L.) with Low-Volume Technology

Published online by Cambridge University Press:  12 June 2017

Charles T. Bryson ,
James E. Hanks  and
Gene D. Wills
Charles T. Bryson
Affiliation:
USDA/ARS, South. Weed Sci. Lab., Stoneville, MS 38776
James E. Hanks
Affiliation:
USDA/ARS, Application Technol. Res. Unit, Stoneville, MS 38776
Gene D. Wills
Affiliation:
Delta Branch, Miss. Agric. and For. Exp. Sta., Stoneville, MS 38776
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Abstract

Field experiments conducted over three years at Stoneville, MS evaluated invert emulsion and oil diluents on the efficiacy of glyphosate and MSMA on purple nutsedge. The herbicides were applied at 0.6 and 1.1 kg ai/ha in an invert emulsion (oil-in-water) and a paraffinic oil at 19 L/ha (low-volume) and in water with a non-ionic surfactant (0.25% v/v) at 187 L/ha (high-volume). Purple nutsedge control with both herbicides was greater with the low-volume, invert emulsion and oil diluent applications than with high-volume, water diluent applications. Glyphosate and MSMA at 1.1 kg/ha in the oil diluent controlled purple nutsedge at least 88% when compared with the invert emulsion (≥ 75 and ≥ 76%, respectively) and water (≥ 42 and ≥ 44%, respectively) diluents. Cotton injury and seed cotton yields were unaffected by any treatment with MSMA but glyphosate with each diluent caused unacceptable cotton injury and seed cotton yield reduction.

Keywords

Glyphosate, N-(phosphonomethyl)glycineMSMA, monosodium salt of methylarsonic acidpurple nutsedge, Cyperus rotundus L. # CYPRO, cotton, Gossypium hirsutum L.Application technologyreduced ratesdiluentscarrierCYPRO
Type
Research
Information
Weed Technology , Volume 8 , Issue 1 , March 1994 , pp. 28 - 31
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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