N-[1-((6-chloropyridin-3-yl)methyl)pyridin-2(1h)-ylidene]-2,2,2- trifluoroacetamide for control of agricultural/horticultural pests

An amine derivative of the following formula (Ie′), or a salt thereof

• (wherein Ar′ is a pyridyl group which may be substituted, or is a pyrimidyl group which may be substituted;
• R1 is a hydrogen atom or a C1-6 alkyl group;
• Y is a hydrogen atom, a halogen atom, a hydroxyl group, a C1-6 alkyl group which may be substituted with a halogen atom, a C1-6 alkyloxy group which may be substituted with a halogen atom, a cyano group, a formyl group or a nitro group;
• and
• R4e is a C1-6 alkyl group substituted with a halogen, or is a C1-6 alkyloxy group which may be substituted with a halogen;
• with the proviso that if Ar′ is a 6-chloro-3-pyridyl group, then R1 is not a hydrogen atom, Y is not a 5-methyl group, and R4e is not a trifluoromethyl group).