Patent ID: 6903237

Claim:
A method of controlling ectoparasitic insect pests for animals which comprises the steps of administering an effective amount of a controller to the body surface of an animal, which contains, as active ingredient thereof, a hydrazine derivative represented by the following general formula (I): wherein A represents in this formula, R 4 represents a hydrogen atom or a C 1-6 alkyl group; X which may be the same or different represents one to five substituents selected from the group consisting of hydrogen atom, halogen atom, C 1-6 alkyl group and halo C 1-6 alkyl group; in this formula, R 4 and X are as defined above, and R 5 represents a hydrogen atom, a C 1-6 alkylcarbonyl group or a phenylcarbonyl group which may optionally have one or two, the same or different substituents selected from C 1-6 alkyl groups; in this formula, R 4 and X are as defined above, or in this formula, R 4 and X are as defined above; R 1 represents a hydrogen atom or a C 1-6 alkyl group; R 2 and R 3 which may be the same or different, each represents a hydrogen atom, a hydroxyl group, a C 1-6 alkyl group, a C 1-6 alkoxy group, a C 1-6 alkylcarbonyl group or a phenylcarbonyl group; Y which may be the same or different, represents one to five substituents selected from the group consisting of hydrogen atom, halogen atom, nitro group and cyano group; Z represents a halogen atom, a cyano group, a C 1-6 alkyl group, a halo C 1-6 alkyl group, a C 1-6 alkoxy group, a halo C 1-6 alkoxy group, a halo C 1-6 alkylthio group, a halo C 1-6 alkylsulfinyl group or a halo C 1-6 alkylsulfonyl group; and W represents an oxygen atom or a sulfur atom.