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dc.contributor.authorDORES, E. F. G. C.pt_BR
dc.contributor.authorSPADOTTO, C. A.pt_BR
dc.contributor.authorWEBER, O. L. S.pt_BR
dc.contributor.authorCARBO, L.pt_BR
dc.contributor.authorVECCHIATO, A. B.pt_BR
dc.contributor.authorPINTO, A. A.pt_BR
dc.date.accessioned2011-04-10T11:11:11Zpt_BR
dc.date.available2011-04-10T11:11:11Zpt_BR
dc.date.created2010-02-24pt_BR
dc.date.issued2009pt_BR
dc.identifier.citationWater, Air Soil Pollut, v. 197, p. 175-183, 2009.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/658650pt_BR
dc.descriptionThe environmental behaviour of metolachlor and diuron was studied in the Central-western region of Brazil, by means of a field study where six experimental plots were installed. The soil was classified as a Latosol, and the soil horizons were characterized. Sorption of metolachlor and diuron was evaluated in laboratory batch experiments. Metolachlor and diuron were applied to the experimental plots on uncultivated soil in October 2003. From this date to March 2004, the following processes were studied: leaching, runoff and dissipation in top soil. Koc of metolachlor varied from 179 to 264 mL g?1 in the soil horizons. Koc of diuron in the Ap horizon was 917 mL g?1, decreasing significantly in the deeper horizons. Field dissipation half-lives of metolachlor and diuron were 18 and 15 days, respectively. In percolated water, metolachlor was detected in concentrations ranging from 0.02 to 2.84 ?g L?1. In runoff water and sediment, metolachlor was detected in decreasing concentrations throughout the period of study. Losses of 0.02% and 0.54% of the applied amount by leaching and runoff, respectively, were observed confirming the high mobility of this herbicide in the environment. In percolated water, diuron was detected with low frequency but in relatively high concentrations (up to 6.29 ?g L?1). In runoff water and soil, diuron was detected in decreasing concentrations until 70 days after application, totalizing 13.9% during the whole sampling period. These results show the importance of practices to reduce runoff avoiding surface water contamination by these pesticides, particularly diuron.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectDissipationpt_BR
dc.titleEnvironmental Behaviour of Metolachlor and Diuron in a Tropical Soil in the Central Region of Brazil.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-04-04T11:11:11Zpt_BR
dc.subject.nalthesaurusleachingpt_BR
dc.subject.nalthesauruspesticidespt_BR
dc.subject.nalthesaurussorptionpt_BR
dc.subject.nalthesaurusrunoffpt_BR
riaa.ainfo.id658650pt_BR
riaa.ainfo.lastupdate2016-04-04pt_BR
dc.identifier.doi10.1007/s1270-008-9801-1pt_BR
dc.contributor.institutionELIANA F. G. C. DORES, Universidade Federal de Mato Grosso; Claúdio Aparecido Spadotto, Embrapa Monitoramento por Satélite; Oscarlina L. S. Weber, Universidade Federal de Mato Grosso; Leandro Carbo, UNESP; Antonio B. Vecchiato, Universidade Federal de Mato Grosso; Alicio A. Pinto, Universidade Federal de Mato Grosso.pt_BR
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