Enhanced degradation of metalaxyl in Gley Humic and Dark Red Latosol

Revista Brasileira de Ciência do Solo

S. Papini²  M. M. Andréa¹ 

[1] ,Centro de Proteção Ambiental Laboratório de Ecologia de Agroquímicos São Paulo SP

关键词: degradation;    fungicide;    biomineralization;    degradação;    fungicida;    biomineralização;   

DOI  :  10.1590/S0100-06832000000200023

来源: SciELO

【 摘 要 】

Enhanced degradation of the fungicide metalaxyl was investigated in two soils: a gley humic (GH) and a Dark Red Latosol (LE), collected at sites never exposed to the fungicide. The soil samples were treated with successive applications of metalaxyl as a commercial formulation and 14C-metalaxyl in laboratory. Metalaxyl biodegradation was analyzed during 63 days by means of radiometric techniques to verify biomineralization and degradation product formation from the applied 14C-metalaxyl. Although biomineralization (maximum of 14 and 8% in the GH and LE soils, respectively), and partial degradation (about 32 and 48%, respectively) were detected in both soils, enhanced degradation was verified only in the GH soil. Results proved that metalaxyl behaves differently in soils.

【 授权许可】

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