In crop production in the fields of agriculture, horticulture and the like, the damage caused by insect pests etc. is still immense, and insect pests resistant to existing insecticides have emerged. Under such circumstances, the development of novel agricultural and horticultural insecticides is desired. The present invention provides an amide compound represented by the general formula (I): (wherein A 1 , A 2 and A 3 each represent a nitrogen atom or a CH group, R 1 represents an alkyl group, R 2 and R 4 each represent a haloalkyl group, R 3 represents an alkyl group, and m represents 0, 1 or 2) or a salt thereof an agricultural and horticultural insecticide and microbicide comprising the compound or a salt thereof as an active ingredient and a method for using the insecticide and microbicide.
