Certain 3-pyridylmethyl N-(4'-substituted-phenyl)carbamates are useful as rodenticides, e.g., in baits or tracking powders. The 4'-substituent may be --NO.sub.2, --CN, --CF.sub.3, --SO.sub.2 NH.sub.2, --SR, --SOR or --SO.sub.2 R where R is lower alkyl. Their salts can also be made and applied as rodenticides.