Fate of ( sup 14 C)monolinuron in potatoes and soil under outdoor conditions

Journal Article · Sat Dec 01 00:00:00 EST 1990 · Ecotoxicology and Environmental Safety; (USA)

DOI:https://doi.org/10.1016/0147-6513(90)90005-P· OSTI ID:5546131

Freitag, D; Scheunert, I ^[1]

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1. Gesellschaft fuer Strahlen- und Umweltforschung mbH Muenchen, (Federal Republic of Germany)

(phenyl-{sup 14}C)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 {sup 14}C in soil, plants, and leached water was about 55% (of {sup 14}C applied) after the first growing period and about 43% after the second growing period. Radioactivity in soil contained 77.1% (based on total {sup 14}C 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 {sup 14}C 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 {sup 14}C (57.9% of total {sup 14}C 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'-dichlorozobenzene.

• OSTI ID: 5546131
• Journal Information: Ecotoxicology and Environmental Safety; (USA), Vol. 20:3; ISSN 0147-6513
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
HERBICIDES
BIODEGRADATION
CARBON 14 COMPOUNDS
LEACHING
MASS SPECTROSCOPY
POTATOES
RESIDUES
SOILS
TRACER TECHNIQUES
CARBON COMPOUNDS
CHEMICAL REACTIONS
DECOMPOSITION
DISSOLUTION
FOOD
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
PESTICIDES
PLANTS
SEPARATION PROCESSES
SPECTROSCOPY
TUBERS
VEGETABLES
540211* - Environment
Terrestrial- Basic Studies- Radiometric Techniques- (1990-)
560300 - Chemicals Metabolism & Toxicology