• Degradation of the herbicide diclofop-methyl in soil and influence of pesticide mixtures on its persistence

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    • Keywords


      Diclofop-methyl; herbicide; degradation; pesticide mixtures; soil

    • Abstract


      The degradation of the herbicide [14C]-diclofopmethyl was investigated in moist parabrown podzol soil at 22°C. Radiochemical procedures were used to monitor the herbicide breakdown. The mineralization of the uniformly labelled aromatic ring was pursued by trapping the14CO2 generated for 96 days. Diclofop-methyl was rapidly degraded in the soil with a half-life of about 8 days. The major breakdown product was the corresponding acid-diclofop, formed by a very rapid hydrolysis of the esterbond. With time the acid appeared to undergo strong binding or complexing to the soil. An intermediate 4-(2,4-dichlorophenoxy) phenol was recovered from the treated soil. Concentration of the phenoxyphenol increased upto 6 days followed by quick decline. Insecticide combination of parathion + Demeton-Smethylsulphoxide partially inhibited diclofop degradation in the soil

    • Author Affiliations


      N G K Karanth1 2 J P E Anderson1 K H Domsch1

      1. Institut für Bodenbiologie, Bundesforschungsanstalt für Landwirtschaft, Bundesallee 50, Braunschweig - 3300, Federal Republic of Germany
      2. Infestation Control and Pesticides Discipline, Central Food Technological Research Institute, Mysore - 570013, India
    • Dates

  • Journal of Biosciences | News

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