Persistence and degradation of metalaxyl, mancozeb fungicides and its metabolite ethylenethiourea in soils.
Artigo
em Inglês
| IMSEAR
| ID: sea-114027
ABSTRACT
The degradation pattern of metalaxyl, mancozeb and its metabolite ethylenethiourea (ETU) residues indicated a close correspondence to first order exponential degradation kinetics in soils. Degradation of fungicides in soils was predominantly biological as well as chemical in nature. Slower degradation ofmetalaxyl was noticed in the soils and their half-life values were higher than mancozeb and ETU as evident by wide range of half-life values from 41.24 to 165.11 days. In case of metalaxyl, Hiriyur soil was found to be superior in degrading the metalaxyl. Lower persistence of mancozeb and ETU was observed in soils resulting in rapid rate of degradation at smaller half-life values as compared to metalaxyl indicating the faster degradation of mancozeb and ETU. In mancozeb applied soils, the ETU formation was increased up to 30 days of incubation and thereafter it declined. Amongsoils, degradation of either mancozeb or ETU is not influenced by soil types. However, mancozeb persistence was higher in Hiriyur soils than Chettalli and Bangalore soils.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Poluentes do Solo
/
Zineb
/
Biodegradação Ambiental
/
Humanos
/
Agricultura
/
Alanina
/
Etilenotioureia
/
Fungicidas Industriais
/
Maneb
Idioma:
Inglês
Ano de publicação:
2004
Tipo de documento:
Artigo
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