Pendimethalin and oxyfluorfen degradation under two irrigation conditions over four years application

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dc.contributor.authorAlister, Claudio A.
dc.contributor.authorGomez, Patricio A.
dc.contributor.authorRojas, Sandra
dc.contributor.authorKogan, Marcelo
dc.date.accessioned2024-01-10T13:16:07Z
dc.date.available2024-01-10T13:16:07Z
dc.date.issued2009
dc.description.abstractA four-year field study was conducted to determine the effect of pluviometric conditions on pendimethalin and oxyfluorfen soil dynamics. Adsorption, dissipation and soil movement were studied in a sandy loam soil from 2003 to 2007. Pendimethalin and oxyfluorfen were applied every year on August at 1.33 and 0.75 kg ha-1, respectively. Herbicide soil concentrations were determined at 0, 10, 20, 40, 90 and 340 days after application (DAA), under two pluviometric regimens, natural rainfall and irrigated (30 mm every 15 days during the first 90 DAA). More than 74% of the herbicide applied was detected at the top 2.5 cm layer for both herbicides, and none was detected at 10 cm or deeper. Pendimethalin soil half-life ranged from 10.5 to 31.5 days, and was affected mainly by the time interval between application and the first rain event. Pendimethalin soil residues at 90 DAA fluctuated from 2.5 to 13.8% of the initial amount applied, and it decreased to 2.4 and 8.6% at 340 DAA. Oxyfluorfen was more persistent than pendimethalin as indicated by its soil half-life which ranged from 34.3 to 52.3 days, affected primarily by the rain amount at the first rainfall after application. Oxyfluorfen soil residues at 90 DAA ranged from 16.7 to 34.8% and it decreased to 3.3 and 17.9% at 340 DAA. Based on half-life values, herbicide soil residues after one year, and soil depth reached by the herbicides, we conclude that both herbicides should be considered as low risk to contaminate groundwater. However, herbicide concentration at the top 2.5 cm layer should be considered in cases where runoff or soil erosion could occur, because of the potential for surface water contamination.
dc.description.funderFONDECYT
dc.fechaingreso.objetodigital2024-05-08
dc.format.extent7 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1080/03601230902800986
dc.identifier.eissn1532-4109
dc.identifier.issn0360-1234
dc.identifier.pubmedidMEDLINE:19365748
dc.identifier.urihttps://doi.org/10.1080/03601230902800986
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78560
dc.identifier.wosidWOS:000265334700002
dc.information.autorucAgronomía e Ing. Forestal;Kogan M;S/I;98569
dc.issue.numero4
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final343
dc.pagina.inicio337
dc.publisherTAYLOR & FRANCIS INC
dc.revistaJOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
dc.rightsacceso restringido
dc.subjectHerbicides
dc.subjectadsorption
dc.subjectdissipation
dc.subjectleaching
dc.subjectvineyards
dc.subjectDINITROANILINE HERBICIDES
dc.subjectMICROBIAL ACTIVITY
dc.subjectSOIL-MOISTURE
dc.subjectGROUND-WATER
dc.subjectDISSIPATION
dc.subjectPERSISTENCE
dc.subjectMOVEMENT
dc.subjectVOLATILIZATION
dc.subjectADSORPTION
dc.subjectPESTICIDES
dc.subject.ods02 Zero Hunger
dc.subject.odspa02 Hambre cero
dc.titlePendimethalin and oxyfluorfen degradation under two irrigation conditions over four years application
dc.typeartículo
dc.volumen44
sipa.codpersvinculados98569
sipa.indexWOS
sipa.trazabilidadCarga SIPA;09-01-2024
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