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This article in SSSAJ

  1. Vol. 40 No. 3, p. 385-389
     
    Received: Aug 12, 1975
    Published: May, 1976


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doi:10.2136/sssaj1976.03615995004000030024x

Influence of Cation Content on the Biological Activity of Fensulfothion in Plainfield Sand1

  1. C. R. Harris and
  2. B. T. Bowman2

Abstract

Abstract

A study was conducted to assess the influence of cations on the biological activity of the organophosphorus insecticide, fensulfothion (O, O-diethylO-[p-(methylsulfinyl)phenyl] phosphorothioate)(Dasanit®) in soil. Bioassays were done using first stage crickets, Gryllus spp. as test insects and a Plainfield sand without and amended with various concentrations of reagent chloride salts of NH4+, K+, Ca2+, Fe3+, and Al3+. The toxicity of fensulfothion decreased with increasing cation content, with the effect being most pronounced with trivalent > divalent > monovalent cations. Results of the bioactivity study paralleled those of an earlier adsorption study on fensulfothion-cation montmorillonite suspensions.

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