Heterocyclic compound and use thereof

The present invention provides a heterocyclic compound having an excellent pest control effect or a salt thereof, a pest control agent comprising the same as an active ingredient, and a production intermediate thereof. The present invention provides: a heterocyclic compound represented by general formula [I] (wherein R1 represents a hydrogen atom, a cyano group, or an unsubstituted or halogen atom-substituted C1-C7 acyl group, R2 represents a C1-C6 alkyl group or the like, A1 and A2 each independently represent a nitrogen atom, CH or a bond, one of W1 and W2 represents a nitrogen atom, R1 represents a hydrogen atom, a cyano group, or an unsubstituted or halogen atom-substituted C1-C7 acyl group, R2 represents a C1-C6 alkyl group or the like, and a pest control agent characterized by containing the heterocyclic compound as an active ingredient; in the formula, one represents a hydrogen atom, the other represents a carbon atom, A3, A4, A5, A6, A7, A8 and A9 each independently represents a nitrogen atom or a car