My Account: Log In | Join | Renew
Search
Author
Title
Vol.
Issue
Year
1st Page

Abstract

 

This article in JEQ

  1. Vol. 2 No. 3, p. 408-411
     
    Received: Aug 23, 1972
    Published: July, 1973


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2134/jeq1973.00472425000200030025x

Fate, Metabolism, and Toxicity of 3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-1-2,2-dioxide in a Model Ecosystem1

  1. Gary M. Booth2,
  2. Ching-Chieh Yu3 and
  3. Dale J. Hansen4

Abstract

Abstract

Bentazon, (3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-1-2,2-dioxide) a new experimental herbicide, was studied in a model ecosystem. The radioactivity could not be ether extracted from the water until the solution was acidified with HCl. We believe that HCl may be either releasing the parent material from conjugates or that it simply needs acidification before it can be extracted. The major metabolite found in the water was N-isopropyl anthranilic acid amide, but bentazon was also present in significant amounts. A fresh water crab (Uca minax) contained anthranilic acid, N-isopropyl anthranilic acid, and bentazon.

The aquatic organisms did not accumulate the chemical to any significant degree, although the fresh water crab accumulated it 50 times over the amount found in the water. This was not considered large when compared to DDT.

This compound generally does not pose a threat to aquatic food chains on the basis of toxicity nor metabolism results.

These data are the first to be published on an experimental herbicide and suggest that the model ecosystem can be used as a tool for routine evaluation of herbicide biodegradability.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .