Noxious-insect repellent

Abstract

Disclosed is a method of repelling noxious insects comprising the step of exposing said noxious insects to a composition containing from 0.1 to 90 wt. %, based on the total weight of the composition, of at least one of 2-(1-hydroxyalkyl) cycloalkanones represented by the following formula 11: wherein n is an integer of 3-10, R1 is hydrogen or a straight-chain saturated hydrocarbon radical having 1-6 carbon atoms; R2 is hydrogen or methyl group and Rm′ represents m′ of the same or different, straight-chain or branched, saturated or unsaturated, hydrocarbon radicals R which, as a substituent group, can be bonded to carbocyclic atoms; m′ is an integer of 0-8, provided that m′ should be at least 2 when n is at least 4 and both the R1and R2 are alkyl groups; the sum of the carbon atoms of Rm′ does not exceed 12; and, further, when n is 4, R may be an isopropylidene group which intramolecularly bridges between the third and sixth carbocyclic atoms.

Dependencies are inferred from the claim text.