Phytopathogenic filamentous fungi other than oomycete microorganisms are controlled using at least one compound selected from among tetrazoyloxime derivatives represented by formula (I) and salts thereof. In formula (I), X represents a C1 to C6 alkyl group or the like, n represents an integer of 0 to 5, Y represents a C1 to C6 alkyl group, Z represents a hydrogen atom or an amino group or the like, Q represents a hydrogen atom or a C1 to C8 alkyl group or the like, R represents a halogeno group or a C1 to C6 alkoxy group, and m represents an integer of 0 to 3.