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Effect of humectants on the uptake and efficacy of glufosinate in wild oat (Avena fatua) plants and isolated cuticles under dry conditions

Published online by Cambridge University Press:  20 January 2017

R. J. L. Ramsey ,
G. R. Stephenson  and
J. C. Hall
R. J. L. Ramsey
Affiliation:
Division of Applied and Environmental Biology, School of Life Sciences, University of Dundee, Dundee, Scotland DD25DA
G. R. Stephenson
Affiliation:
Department of Environmental Biology, Ontario Agricultural College University of Guelph, Guelph, ON N1G 2W1, Canada
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Abstract

A series of dose–response experiments were performed at low humidity to determine if glufosinate efficacy could be increased by lengthening the drying time through the addition of humectants. Of several humectants evaluated, only 5% glycerol or 5% triethylene glycol when applied with glufosinate produced dry weight reductions and mortality similar to exposure to high humidity. 14C-glufosinate movement through isolated wild oat cuticles was greater at high humidity, poorest at low humidity, but intermediate at low humidity in the presence of 5% glycerol in the spray solution. The increases in uptake observed at high humidity and with 5% glycerol at low humidity were characterized by greater initial uptake that continued much longer than that observed at low humidity without humectant.

Keywords

Wild oat, Avena fatua L. AVEFAHumidityvapor pressure deficit
Type
Physiology, Chemistry, Biochemistry
Information
Weed Science , Volume 54 , Issue 2 , April 2006 , pp. 205 - 211
Copyright
Copyright © Weed Science Society of America 

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