[Surface water contamination by pesticides]

agua de riego agua potable agua superficial aquatic environment bretagne brittany calidad del agua centre centre (france) cours d'eau cursos de agua drinking water eau d'irrigation eau potable eau superficielle fitotoxicidad herbicidas herbicide herbicides irrigation water milieu aquatique pesticide pesticides phytotoxicity plaguicidas pollution by agriculture pollution de l'eau pollution par l'agriculture purification de l'eau residues residuos rivers surface water toxicidad toxicity water pollution water purification water quality