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Effects of Spray Volume and Droplet Size on Herbicide Deposition and Common Cocklebur (Xanthium strumarium) Control

Published online by Cambridge University Press:  20 January 2017

David R. Shaw ,
William H. Morris ,
Eric P. Webster  and
David B. Smith
David R. Shaw*
Affiliation:
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762
William H. Morris
Affiliation:
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762
Eric P. Webster
Affiliation:
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762
David B. Smith
Affiliation:
Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS 39762
*
Corresponding author's E-mail: dshaw@weedscience.msstate.edu.
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Abstract

A field study was conducted in 1992 and 1993 to identify the spray volume and droplet size combinations to optimize control of common cocklebur (Xanthium strumarium) from acifluorfen by maximizing target deposition. In many instances, acifluorfen controlled common cocklebur better using either small (250 µm) or large (450 µm) spray droplets when applied at the lower carrier volumes of either 56 or 112 L/ha. When sprays were applied at 169 L/ha, there was little difference in control between droplet sizes. Deposition of acifluorfen was determined in 1993. Stepwise regression indicated that acifluorfen deposition amount is less important than environmental conditions for common cocklebur control. Relative humidity was the most significant variable for determining common cocklebur control with acifluorfen.

Keywords

Acifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acidcommon cocklebur, Xanthium strumarium L. # XANSTAcifluorfendepositionefficacyXANSTVMD, volume median diameterWAT, weeks after treatment
Type
Research Article
Information
Weed Technology , Volume 14 , Issue 2 , June 2000 , pp. 321 - 326
Copyright
Copyright © Weed Science Society of America 

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