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Poult Sci. 1984 Jan;63(1):61-5.

Residues of carbaryl and two of its metabolites in eggs of laying hens treated with Sevin for northern fowl mite control by dipping.


White Leghorn laying hens were treated with carbaryl [Sevin, 1-naphthyl-N-methylcarbamate] by dipping in a .5 or 1.0% (active ingredient) water suspension of an 80% commercially available wettable powder formulation. Residues of carbaryl and two of its metabolites, 1-naphthol and N-hydroxymethyl carbaryl, were detected in eggs within 1 day and reached maximum levels 5 to 7 days after dipping. After that time residues steadily declined but were still detectable 56 days posttreatment in the eggs of the high-dose hens. At no time during the study did total residues in eggs exceed the current .5 ppm egg tolerance for carbaryl and its metabolites.

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