A tetrazolinone compound represented by formula (1): wherein R 1 represents a hydrogen atom, a C1-C3 alkyl group optionally having one or more halogen atoms, a C1-C3 alkoxy group optionally having one or more halogen atoms, a halogen atom, a cyano group, or a C1-C3 alkylthio group optionally having one or more halogen atoms； and R 2 represents a C1-C3 alkyl group optionally having one or more halogen atoms, a C1-C3 alkoxy group optionally having one or more halogen atoms, a hydrogen atom, a halogen atom, or a C3-C4 cycloalkyl group optionally having one or more halogen atoms, has excellent control activity against plant diseases.
