Resumo

TOSI, Analía P.; PECHEN DE D'ANGELO, Ana M.; SAVINI, Mónica C.  e  LOEWY, Ruth M.. Assessing Pesticide Hazards On Surface Water From The Northern Patagonian Region-Argentina. Acta toxicol. argent. [online]. 2009, vol.17, n.1, pp.1-6. ISSN 1851-3743.

Although the Integrated Pest Management (IPM) is increasingly being applied in the Northern Patagonia Region, different pesticides are still used in order to properly control agricultural pests. Other agrochemicals are also applied in the agriculture associated activities like conservation and packaging industries. The potential impact caused by these pesticides on aquatic organisms is assessed in the present study by means of acute toxicity data available in the literature and local analytical results. A tiered procedure was used allowing the selection of those environmental xenobiotics that need further ecotoxicity studies. The observed maximum residues of azinphos-methyl, (S-(3,4-dihydro-4-oxobenzo[d]-[1,2,3]-triazin-3-ylmethyl)O,O-dimethyl phosphordithioate), indicate the probability of acute effects in 37 % of the studied species in the river, mainly fish and zooplankton. This value increased in drainage channels samples up to 42 %. Additionally, carbaryl (1-napthylmethylcarbamate) residues found in drainage channels affect 14 % of the studied species, while in the river samples the impact was negligible.

Palavras-chave : Pesticides; Surface water; Risk assessment; Azinphos-methyl; Carbaryl.

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