Degradation of14 C-carbaryl in soils modified by organic matter oxidation and glucose addition

Abstract

The behaviour of the insecticide carbaryl was studied during eight weeks by means of radiometric techniques in samples of Brunizem and Dark-Red Latosol soils from Paraná, Brazil. Groups of oxidized, sterilized and untreated soils with and without glucose additions were incubated with ¹⁴C-carbaryl and analyzed. In both soils, results showed an increase in the degradation rate of carbaryl in oxidized samples whereas adding glucose did not influence its degradation rate. Three metabolites having R_f 0.23, 0.40 and 0.70 were detected.