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Fate of (14C)Monolinuron in Potatoes and Soil under Outdoor Conditions.

Ecotoxicol. Environ. Saf. 20, 256-268 (1990)
DOI
[phenyl-14C]Monolinuron was applied (2.5 and 1.9 kg/ha) to the soil surface of an outdoor lysimeter in two successive years; then, potatoes were grown. Total recovery of 14C in soil, plants, and leached water was about 55% (of 14C applied) after the first growing period and about 43% after the second growing period. Radioactivity in soil contained 77.1% (based on total 14C recovered in soil) bound residues, 15% monolinuron, and the following conversion products: N-(4-hydroxyphenyl)-N′-methoxy-N′-methylurea, N-(4-chlorophenyl)-N′-methylurea, N-(4-chlorophenyl)methylcarbamate, N-(4-chlorophenyl)-N-methyl-methylcarbamate, and 4-chloroformanilide. The leachate contained 0.8% (based on total 14C recovered in leachate) N-(4-hydroxyphenyl)-N′-methoxy-N′-methylurea. Potato plants contained 0.106 mg/kg radioactive residues in peeled tubers after one growing period and 15.94 mg/kg in the tops; after two growing periods, peeled tubers contained 0.091 mg/kg and tops contained 18.87 mg/kg radioactive residues. These residues consisted of bound 14C (57.9% of total 14C recovered in plants), N-(4-hydroxyphenyl)-N′-methoxy-N′-methylurea, N-(4-chlorophenyl)-N′-methylurea, N-(4-chlorophenyl)methylcarbamate, N-(4-chlorophenyl)-N-methyl-methylcarbamate, and 4,4′-dichloroazobenzene.
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Publication type Article: Journal article
Document type Scientific Article
ISSN (print) / ISBN 0147-6513
e-ISSN 0147-6513
Quellenangaben Volume: 20, Issue: 3, Pages: 256-268 Article Number: , Supplement: ,
Publisher Elsevier
Reviewing status Peer reviewed
Institute(s) Institute of Ecological Chemistry (IOEC)