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resumen

Resumen
The sulfonylurea (SUs) herbicides are used to control broadleaf weeds and some grasses in a variety of crops. They have become popular because of their low application rates, low mammalian toxicity and an outstanding herbicidal activity. Sorption is a major process influencing the fate of pesticides in soil. The objective of this study was to characterize sorption–desorption of four sulfonylurea herbicides: metsulfuron-methyl (methyl [ver mas...]
dc.contributor.authorAzcarate, Mariela Pamela
dc.contributor.authorMontoya, Jorgelina Ceferina
dc.contributor.authorKoskinen, William C.
dc.date.accessioned2018-03-23T15:48:04Z
dc.date.available2018-03-23T15:48:04Z
dc.date.issued2015-02-25
dc.identifier.issn0360-1234
dc.identifier.issn1532-4109 (Online)
dc.identifier.otherhttp://dx.doi.org/10.1080/03601234.2015.999583
dc.identifier.urihttp://hdl.handle.net/20.500.12123/2109
dc.description.abstractThe sulfonylurea (SUs) herbicides are used to control broadleaf weeds and some grasses in a variety of crops. They have become popular because of their low application rates, low mammalian toxicity and an outstanding herbicidal activity. Sorption is a major process influencing the fate of pesticides in soil. The objective of this study was to characterize sorption–desorption of four sulfonylurea herbicides: metsulfuron-methyl (methyl 2-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)carbamoylsulfamoyl)] benzoate), sulfometuron-methyl (methyl 2-[(4,6-dimethylpyrimidin-2-yl)carbamoylsulfamoyl]benzoate), rimsulfuron (1-(4,6- dimethoxypyrimidin-2-yl)-3-(3-ethylsulfonyl-2-pyridylsulfonyl)urea) and nicosulfuron (2-[(4,6-dimethoxypyrimidin-2-yl) carbamoylsulfamoyl]-N,N-dimethylnicotinamide) from different soil horizons of different landscape positions. Sorption was studied in the laboratory by batch equilibration method. Sorption coefficients (Kd-SE) showed that rimsulfuron (Kd-SE D 1.18 to 2.08 L kg -1) and nicosulfuron (Kd-SE D 0.02 to 0.47 L kg -1) were more highly sorbed than metsulfuron-methyl (Kd-SE D 0.00 to 0.05 L kg -1) and sulfometuron-methyl (Kd-SE D 0.00 to 0.05 L kg -1). Sorption coefficients (Kd-SE) were correlated with pH and organic carbon content. All four herbicides exhibited desorption hysteresis where the desorption coefficients (Kd-D) > Kd-SE. To estimate the leaching potential, Koc and ground-water ubiquity score (GUS) were used to calculate the half-life (t1/2) required to be classified as “leacher” or “nonleacher”. According to the results, rimsulfuron and nicosulfuron herbicides would be classified as leachers, but factors such as landscape position, soil depth and the rate of decomposition in surface and subsurface soils could change the classification. In contrast, these factors do not affect classification of sulfometuron-methyl and metsulfuron-methyl; they would rank as leachers.es_AR
dc.formatapplication/pdf
dc.language.isoeng
dc.relationinfo:eu-repograntAgreement/INTA/PNNAT/1128041/AR./Gestion de sistemas agropecuarios y agroindustriales para reducir la contaminación.eng
dc.relationinfo:eu-repograntAgreement/INTA/PNNAT/1128043/AR./Los agroquímicos como fuente de contaminación difusa en agroecosistemas.
dc.rightsinfo:eu-repo/semantics/restrictedAccesseng
dc.sourceJournal of environmental science and health, Part B 50 : 229–237. (2015)eng
dc.subjectSorciónes_AR
dc.subjectHerbicidas de Sulfonilureaes_AR
dc.subjectLixiviaciónes_AR
dc.subjectHorizontes del Sueloes_AR
dc.subjectSueloes_AR
dc.subjectSorptioneng
dc.subjectPesticide Toxicityeng
dc.subjectLeachingeng
dc.subjectSoil Horizonseng
dc.subjectSulfonylurea Herbicideseng
dc.subject.otherArgentinaes_AR
dc.titleSorption, desorption and leaching potential of sulfonylurea herbicides in Argentinean soilseng
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.description.filFil: Azcarate, Mariela Pamela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentinaes_AR
dc.description.filFil: Montoya, Jorgelina Ceferina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentinaes_AR
dc.description.filFil: Koskinen, William C. Department of Agriculture. Agricultural Research Service. Soil and Water Management Research Unit; Estados Unidoses_AR
dc.subtypecientifico


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