Soil Degradation of Metazachlor in Agronomic and Vegetable Crop Fields
(1992) Weed Science — Vol. 40, n° 1, p. 149-154 (1992)
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- Metazachlor degradation in soil was studied in fields of spring barley, turnips, brussels sprouts, and leeks. Metazachlor in soil was transformed into 2-hydroxy-N-(2,6-dimethylphenyl)-N-(1H-pyrazol-1-yl methyl)-acetamide (compound 2), 2-chloro-N-(2,6-dimethylphenyl)-acetamide (compound 3), and 4,4'-methylenebis-(2,6-dimethylbenzenamine) (compound 4). Soil concentrations of compound 4 were always lower than 0.1 ppm. The half-life of metazachlor in the 0- to 10-cm soil layer was 1 to 3 mo. Metazachlor and compounds 2, 3, and 4 were not detected in the 10- to 20- and 20- to 30-cm soil layers. Metazachlor and metabolites (compounds) 2, 3, and 4 were not detected in barley grain or in the edible part of the vegetables. The sensitivity limit for these compounds was 0.02 ppm. Nomenclature: Metazachlor, 2-chloro-N-(2,6-dimethylphenyl)-N-(1H-pyrazol-1-ylmethyl)-acetamide; spring barley, Hordeum vulgare L., subsp. hexastichon 'Apex'; turnip, Brassica napus L., subsp. napus 'Leielander'; brussels sprouts, Brassica oleracea L., subsp. Gemmifera, 'Acropolis'; leeks, Allium porum L., subsp. 'Alberta'; lettuce, Lactuca sativa L., 'Hilde'; cabbage, Brassica oleracea L., subsp. Bullata, 'Savoy King'.
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Rouchaud, J., Metsue, M., Vanhimme, M., Bulcke, R., Gillet, J., & Vanparys, L. (1992). Soil Degradation of Metazachlor in Agronomic and Vegetable Crop Fields. Weed Science, 40(1), 149-154. https://hdl.handle.net/2078.5/35999 (Original work published 1992)