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Evaluation of Methods to Quantify Herbicide Penetration in Leaves

Published online by Cambridge University Press:  20 January 2017

Anthony D. White ,
Carol A. Heaverlo  and
Micheal D. K. Owen
Anthony D. White*
Affiliation:
Department of Agronomy, Iowa State University, 2104 Agronomy Hall, Ames, IA 50011-1010
Carol A. Heaverlo
Affiliation:
Department of Agronomy, Iowa State University, 2104 Agronomy Hall, Ames, IA 50011-1010
Micheal D. K. Owen
Affiliation:
Department of Agronomy, Iowa State University, 2104 Agronomy Hall, Ames, IA 50011-1010
*
Corresponding author's E-mail: adwhite@iastate.edu.
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Abstract

Epicuticular wax is a major barrier to the movement of foliar-applied herbicides into plant leaves. Many researchers have evaluated the penetration of herbicides in plants using similar methods. However, the methods used to remove unabsorbed herbicide from the leaf surface have been inconsistent among scientists. Laboratory experiments were conducted to evaluate the effectiveness of various compounds as a leaf wash for removing unabsorbed 14C-labeled herbicides from shattercane and velvetleaf leaves. Product B and Product C provided poor results as a leaf wash compared with water, chloroform, methanol, and Product A. Product A increased the amount of 14C-bentazon removed from velvetleaf by 26% compared with the amount removed by chloroform, methanol, or water. Removal of 14C-nicosulfuron was not different between chloroform, Product A, methanol, or water. Although water was the best treatment for the two salts of 14C-glyphosate, Product A was as good or better than chloroform and methanol.

Keywords

Bentazonglyphosatenicosulfuronshattercane, Sorghum bicolor L. #3 SORBIvelvetleaf, Abutilon theophrasti L. # ABUTHEpicuticular wax, leaf wash, radiolabeled herbicidesIPA, isopropylamineLSS, liquid scintillation spectrometryTMS, trimethylsulfonium
Type
Research
Information
Weed Technology , Volume 16 , Issue 1 , March 2002 , pp. 37 - 42
Copyright
Copyright © Weed Science Society of America 

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