Abstract

                                An unidentified species of Pseudomonas capable of utilising Carboxin and Oxy- carboxin as sole source of carbon and nitrogen was isolated from red sandy loam soil perfused with solutions of these fungicides. The bacterium hydrolyzed Oxycarboxin to aniline and oxidised Carboxin to the corresponding sulphoxide and then to the sul- phone. The sulphone derivative was further hydrolyzed liberating aniline. Further, deg- radation of aniline by the organism resulted in the accumulation of ammonium which was partly oxidized to nitrite. Nitrite accumulated in the media without further oxidation to nitrate.

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