title: Residues of carbaryl and two of its metabolites in eggs of laying hens treated with Sevin for northern fowl mite control by dipping.
abstract: 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.
mesh_terms: D000287:Administration, Topical; D000818:Animals; D012721:Carbaryl / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000032:analysis* / Q000627:therapeutic use; D002645:Chickens; D002849:Chromatography, Gas; D004531:Eggs / Q000032:analysis*; D005260:Female; D008924:Mite Infestations / Q000517:prevention & control / Q000662:veterinary*; D009284:Naphthols / Q000032:analysis*; D011201:Poultry Diseases / Q000517:prevention & control*
chemical_list: D009284:Naphthols; C029350:1-naphthol; C040574:N-(hydroxymethyl)carbaryl; D012721:Carbaryl