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Sustainable agriculture practices and integrated pest management for avoiding environmental pollution are necessary to maintain a high yield in vineyard areas. Pesticide residues in groundwater in a vineyard area of La Rioja (Spain) have been evaluated in previous years, and they could now have varied after farmers have adopted the different measures recommended. Accordingly, this research's objectives were (i) to evaluate the occurrence and seasonal distribution (spring, summer, and autumn samplings) of pesticides (36) plus their degradation products (DP) (11) in water and soil samples (23 + 15) in La Rioja (Northern Spain), and (ii) to compare the current water quality (2019) with that determined previously (2011). A multi-residue method based on solid phase extraction (for water samples) or solid liquid extraction (for soil samples) and high-performance liquid chromatography coupled to mass spectrometry (HPLC-MS) was used to determine and quantify pesticides. The results reveal the presence in waters of 30 compounds from those selected (15 fungicides + 2 DP, 7 insecticides + 1 DP, and 3 herbicides +2 DP), with 14 of them at concentrations > 0.1 μg L-1 (water quality threshold for human consumption). The highest number of compounds was detected in summer (waters) and spring (soils). The pesticides most frequently detected in water samples were the fungicides metalaxyl, tebuconazole, and boscalid, with the last one being the compound found in the highest number of soil samples. The comparison of water pollution in 2011 and 2019 indicates a significant decrease in the total concentration of herbicides, fungicides and insecticides in 95-100%, 76-90%, and 42-85% of samples in the three campaigns, respectively. The results indicate that an optimized and sustainable use of pesticides in intensive and high-yield agricultural areas could reduce environmental pollution.
3308.11 Control de la Contaminación del Agua, Farms, Environmental pollution, Soil, Humans, Pesticides, Pesticidas, Pesticide residues, Vineyard area, Pesticide Residues, Agriculture, Contaminaci?n aguas y suelos, 3308.11 Control de la Contaminaci?n del Agua, Contaminación aguas y suelos, pesticidas, Seasonal and temporal change, Spain, Water Pollutants, Chemical, Environmental Monitoring
3308.11 Control de la Contaminación del Agua, Farms, Environmental pollution, Soil, Humans, Pesticides, Pesticidas, Pesticide residues, Vineyard area, Pesticide Residues, Agriculture, Contaminaci?n aguas y suelos, 3308.11 Control de la Contaminaci?n del Agua, Contaminación aguas y suelos, pesticidas, Seasonal and temporal change, Spain, Water Pollutants, Chemical, Environmental Monitoring
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