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Dicamba Absorption and Translocation as Influenced by Formulation and Surfactant

Published online by Cambridge University Press:  12 June 2017

Phil J. Petersen ,
Lloyd C. Haderlie ,
Raymond H. Hoefer  and
Ray S. McAllister
Phil J. Petersen
Affiliation:
Univ. Idaho Res. & Ext. Ctr., Aberdeen, ID 83210
Lloyd C. Haderlie
Affiliation:
Univ. Idaho Res. & Ext. Ctr., Aberdeen, ID 83210
Raymond H. Hoefer
Affiliation:
Lilly Res. Lab., Indianapolis, IN 46268
Ray S. McAllister
Affiliation:
Iowa State Univ., Ames, IA 50011
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Abstract

Absorption and translocation of 14C-dicamba (3,6-dichloro-o-anisic acid) in seven salt formulations were determined 60 h after application to leaves of soybean [Glycine max (L.) Merr. ‘Williams’] grown in nutrient solution. The dimethylamine (DMA) formulation was consistently absorbed and retained in the plant in amounts equal to or greater (46% of recovered 14C) than other formulations (which averaged 19% of recovered 14C) when applied without surfactant. Absorption and subsequent retention of the DMA formulation in the plant was least affected of all formulations by the addition of a surfactant. With a surfactant, absorption of the DMA, monoethanolamine (MEA), and inorganic salt formulations was similar (>75% of recovered 14C). Addition of seven surfactants to the K-salt of dicamba increased both the amount of 14C absorbed by 35 to 56% and the amount recovered in the plant. All surfactants except one enhanced absorption of the K-salt of dicamba to a similar degree. Dicamba exhibited predominantly symplastic translocation with the majority of 14C being recovered in the new second trifoliolate leaves and nutrient solution. As much as 66% of the radioactivity absorbed through the leaves was exuded by roots into the nutrient solution 60 h after leaf treatment.

Keywords

AdjuvantssoybeanGlycine max
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 33 , Issue 5 , September 1985 , pp. 717 - 720
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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