Dissipation of cyanazine and metolachlor on a clay loam soil, Ontario, Canada, 1987-1990

• Published in: Archives of environmental contamination and toxicology Vol. 21; no. 2; pp. 253 - 262
• Main Authors: Frank, R. (Ontario Ministry of Agriculture and Food, Guelph, Ontario, Canada), Clegg, B.S, Patni, N.K
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer-Verlag 01-08-1991; Berlin; New York, NY
• Subjects: AGUA DE DRENAJE; AGUAS SUBTERRANEAS; APPLICATION; Applied sciences; CARACT MORFOLOGICAS DEL SUELO; CIANAZINA; CYANAZINE; DRAINAGE; DRAINAGE WATER; DRENAJE; EAU DE DRAINAGE; EAU SOUTERRAINE; Exact sciences and technology; GROUNDWATER; HERBICIDAS; HERBICIDE; HERBICIDES; LEACHING; LESSIVAGE DU SOL; LIXIVIACION; METOLACHLOR; METOLACHLORE; METOLACLORO; MOVEMENT IN SOIL; ONTARIO; Pollution; POLLUTION DE L'EAU; Pollution sources. Measurement results; POLUCION DEL AGUA; PROCESOS DE TRANSPORTE EN EL SUELO; PROFILES; RESIDU; RESIDUES; RESIDUOS; Soil and sediments pollution; SOIL MORPHOLOGICAL FEATURES; SOIL TRANSPORT PROCESSES; TEXTURAL SOIL TYPES; TILE DRAINAGE; TIPOS TEXTURALES DE SUELOS; TRAIT MORPHOLOGIQUE DU SOL; TRANSPORT DANS LE SOL; TYPE DE SOL TEXTURAL; WATER POLLUTION; Canada, Ontario; Pollutant behavior; Residue; Carboxamide; Water pollution; Soil pollution; Drainage water; Herbicide; Clay loam soil; Ground water
• ISSN: 0090-4341; 1432-0703
• DOI: 10.1007/BF01055344

Studies are reported on the fate of 2 weedkillers, cyanazine and metolachlor, following 2 and 3 applications, respectively, to a clay loam soil during a 3-year period. Tabulated data are included on precipitation and mean temperatures during the study period, the disappearance of the 2 compounds from the upper layers of the soil, the removal of the 2 compounds in tile drainage waters, the concentrations in groundwater, and the disappearance and dissipation of the 2 compounds. The results indicated that cyanazine degraded rapidly in situ, with no measurable losses via tile drainage. Metolachlor degraded more slowly, persisting to the next growing season, and there was some leaching to groundwater and some losses via tile drainage and surface run-off.