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Non-target effects of three formulated pesticides on microbially-mediated processes in a clay-loam soil

Muñoz-Leoz, Borja and Garbisu, Carlos and Charcosset, Jean-Yves and Sanchez-Pérez, José-Miguel and Antigüedad, Iñaki and Ruiz-Romera, Estilita Non-target effects of three formulated pesticides on microbially-mediated processes in a clay-loam soil. (2013) Science of The Total Environment, 449. 345-354. ISSN 0048-9697

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Official URL: http://dx.doi.org/10.1016/j.scitotenv.2013.01.079

Abstract

An experiment was performed to study non-target effects of difenoconazole (fungicide), deltamethrin (insecticide) and ethofumesate (herbicide) on microbial parameters in a clay-loam soil. Pesticides were applied as commercial formulations to soil samples at different concentrations (5, 50 and 500 mg kg−1 DW soil) and then incubated under laboratory conditions for 3 months. Throughout the incubation period, microbial parameters were determined at days 7, 30, 60 and 90. At 5 mg kg−1 DW soil, none of the three pesticides caused significant changes in soil microbial parameters. In contrast, at 500 mg kg−1 DW soil, pesticide application decreased overall soil microbial activity, negatively affecting the activity of soil enzymes. Similarly, at 500 mg kg−1 DW soil, difenoconazole and ethofumesate, but not deltamethrin, caused a pesticide-induced stress on soil microbial communities, as reflected by the respiratory quotient. Besides, deltamethrin and ethofumesate at 50 and 500 mg kg−1 DW soil resulted in lower values of denitrification potential. It was concluded that, although pesticide concentration had a somewhat inconsistent and erratic effect on soil microbial parameters, pesticide application at 500 mg kg−1 DW soil did have an impact on many of the microbial parameters studied here.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Science of The Total Environment website : http://www.sciencedirect.com/science/journal/00489697
HAL Id:hal-00956747
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Universidad del País Vasco - Euskal Herriko Unibertsitatea - EHU (SPAIN)
Other partners > Neiker-Instituto Vasco de Investigación y Desarrollo Agrario (SPAIN)
Laboratory name:
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Deposited By: Jean-Yves Charcosset
Deposited On:07 Mar 2014 10:19

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