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Stability of Sethoxydim and Its Degradation Products in Solution, in Soil, and on Surfaces

Published online by Cambridge University Press:  12 June 2017

Antony R. Shoaf  and
William C. Carlson
Antony R. Shoaf
Affiliation:
Health Prot. Sect., Bowman Gray School of Medicine, Wake Forest Univ., Winston-Salem, NC 27103
William C. Carlson
Affiliation:
South. For. Res. Ctr., Weyerhaeuser Co., 900 Whittington Avenue, Hot Springs, AR 71902
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Abstract

Sethoxydim reacts spontaneously with water resulting in immediate structural changes. Simulation of field conditions of light, moisture, oxygen, pH, and soil and evaporation on siliceous surfaces duplicated this lability. Sethoxydim degradation was enhanced by alkaline conditions, ultraviolet and incandescent light, and adsorption on solid surfaces. No sethoxydim was detected immediately after application to moist soil. Less than 2% extractable sethoxydim was present in dry soil after 24 h.

Keywords

Sethoxydim2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-oneBreakdown productswater-labile herbicidechromatography of by-products
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 40 , Issue 3 , September 1992 , pp. 384 - 389
Copyright
Copyright © 1992 by the Weed Science Society of America 

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