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Artículo

Spatial and temporal trends and flow dynamics of glyphosate and other pesticides within an agricultural watershed in Argentina

Pérez, Débora JesabelIcon ; Okada, ElenaIcon ; de Gerónimo, EduardoIcon ; Menone, Mirta LujanIcon ; Aparicio, Virginia CarolinaIcon ; Costa, Jose Luis
Fecha de publicación: 12/2017
Editorial: Society of Environmental Toxicology and Chemistry
Revista: Environmental Toxicology and Chemistry
ISSN: 0730-7268
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Agricultura

Resumen

In the present study, we evaluated the spatial and temporal trends of current-use pesticides in surface water and sediments as well as their relationship with hydrological stream dynamics within the agricultural watershed of El Crespo stream (Buenos Aires Province, Argentina). We sampled 2 contrasting sites: site 1 (upstream), surrounded by agricultural lands, and site 2 (downstream), surrounded by natural grasslands. Most of the applied pesticides (glyphosate, 2,4-D, atrazine, tebuconazole, and imidacloprid) were detected at high frequencies in surface water samples at both sites. However, only glyphosate and aminomethylphosphonic acid (AMPA) were present at high concentrations and had a significant spatial–temporal trend. The highest concentrations were found during spring 2014 at site 1, in association with the intense rains that occurred in that season. The fact that glyphosate and AMPA concentrations were higher than the rest of the studied compounds is closely related to the land use within the watershed, as glyphosate was the most applied herbicide during the fallow period of glyphosate-resistant crops (soybean, maize). The pesticide mixture had a significant spatial–temporal trend, reaching the highest levels during storm flow events in spring 2014. The intensive rains in spring 2014 could be the main factor influencing stream hydrology and pesticide behavior at El Crespo watershed. The estimated annual pesticide losses were 3.11 g/ha at site 1 and 0.72 g/ha at site 2. This result indicates that an attenuation process could be decreasing pesticide loads during downstream transport from site 1 to site 2.
Palabras clave: Glyphosate , Pesticide Loss , Pesticide Mixture , Stream Discharge , Surface Water
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/54101
DOI: http://dx.doi.org/10.1002/etc.3897
URL: https://setac.onlinelibrary.wiley.com/doi/abs/10.1002/etc.3897
Colecciones
Articulos(CCT - MAR DEL PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MAR DEL PLATA
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Citación
Pérez, Débora Jesabel; Okada, Elena; de Gerónimo, Eduardo; Menone, Mirta Lujan; Aparicio, Virginia Carolina; et al.; Spatial and temporal trends and flow dynamics of glyphosate and other pesticides within an agricultural watershed in Argentina; Society of Environmental Toxicology and Chemistry; Environmental Toxicology and Chemistry; 36; 12; 12-2017; 3206-3216
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