A three-year study of the spatial and temporal variation of pesticide residues in Viotikos Kifissos basin (VKB), in central Greece, before and after the application of Low-Input Crop Management systems (LCM), was carried out between May 2009 and November 2011. A total of 253 water samples
from 34 sampling points (boreholes, rivers, wells, vadose zone) were analysed for the presence of more than 200 pesticides and degradation products, using liquid and gas chromatography coupled to tandem mass spectrometry. Samples were prepared by solid-phase extraction (SPE) using Oasis HLB
cartridges. Almost 70% of the samples were found positive for the presence of pesticides in amounts greater than the limit of detection. The most frequently detected pesticide was fluometuron, followed by s-metolachlor, metalaxyl-M, imidacloprid and ethalfluralin. The highest concentration
was recorded for fluometuron (322 μg L−1), ethalfluralin (123 μg L−1) and s-Metolachlor (36.4 μg L−1). Results showed a reduction of the pesticides detected and quantified in water samples during 2011 compared to those
measured in 2009 and 2010.
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Low-Input Crop Management;
Document Type: Research Article
National Reference Laboratory for Pesticides Residues, BenakiPhytopathological Institute, Kifissia, 14561, Greece
Laboratory of Toxicological Control of Pesticides, BenakiPhytopathological Institute, Kifissia, 14561, Greece
Laboratory of Analytical Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis, Athens, 15771, Greece
October 21, 2015
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