Abstract: An aqueous suspension-form pesticidal composition comprising: at least one pesticidal active ingredient selected from the group consisting of amine derivatives represented by the following general formula (1) and salts thereof; a highly-purified and partially-desulfonated lignosulfonate; and an aqueous dispersion medium [In the general formula (1), Ar represents a pyridyl group optionally substituted with a halogen atom or the like, or a pyrimidyl group optionally substituted with a halogen atom or the like; R1 represents a hydrogen atom or a C1-6 alkyl group; Y represents a hydrogen atom or the like; and R2 represents a C1-6 alkyl group substituted with a halogen].