Azinphos Methyl Residues in Shallow Groundwater from the Fruit Production Region of Northern Patagonia, Argentina

Groundwater samples were collected from monitoring wells along an area of intensive fruit production. Different types of correlations were investigated between soil physicochemical characteristics, depths and agricultural practices with pesticide detection frequency. In the three analyzed periods az...

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Bibliographic Details
Published in:Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes Pesticides, food contaminants, and agricultural wastes, 2006-09, Vol.41 (6), p.869-881
Main Authors: LOEWY, R. M., CARVAJAL, L. G., NOVELLI, M., PECHEN DE D'ANGELO, A. M.
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Argentina
Azinphos methyl
Azinphosmethyl - analysis
Biological and medical sciences
Contamination
Environmental Monitoring
Fresh Water - analysis
Fruit - chemistry
Fundamental and applied biological sciences. Psychology
Groundwater
Insecticides
Insecticides - analysis
Leaching potential
Monitoring
Pesticide Residues - analysis
Pollution
Seasons
Soil
Soil and water pollution
Soil Pollutants - analysis
Soil science
Time Factors
Water Pollutants, Chemical - analysis
Water Supply
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Summary:Groundwater samples were collected from monitoring wells along an area of intensive fruit production. Different types of correlations were investigated between soil physicochemical characteristics, depths and agricultural practices with pesticide detection frequency. In the three analyzed periods azinphos methyl, S-(3,4-diydro-4-oxobenzo[d]-[1,2,3]-triazin-3-ylmethyl)-O,O-dimethyl phosphorodithioate, showed a definite seasonal behavior related to the application pattern, increasing its concentration in the aquifer from October to November-December and then decreasing towards March. Samples obtained during the non-spraying season showed that azinphos methyl residues were lower than detection limit (LOD). An inverse correlation was observed between azinphos methyl concentration and the time elapsed since the last pesticide application. Seasonal events such as rain and irrigation influence the chemical concentration in the well, while no correlation was obtained between soil characteristics and azinphos methyl concentration. The soil attenuation capacity was not enough to prevent the presence of azinphos methyl in the aquifer during the application season.
ISSN:0360-1234
1532-4109
DOI:10.1080/03601230600805956