Tetrazoyloxime derivative and plant disease control agent

A tetrazoyloxime derivative represented by formula (1):

• wherein X represents a halogen atom, a C1-8 alkyl group, a C1-8 alkoxy group, a cyano group, a C1-8 alkylsulfonyl group, a nitro group, a C1-8 haloalkyl group, or an unsubstituted or substituted aryl group;
• n1 represents an integer of 0;
• A represents a tetrazoyl group represented by formula (2):
• (in which Y represents a C1-8 alkyl group);
• and
• Het represents a pyridyl group represented by formula (4):
• (in which R represents a halogen atom, a cyano group, a nitro group, a hydroxyl group, a thiol group, a formyl group, a carboxyl group, an unsubstituted or substituted amino group, an unsubstituted or substituted C1-8 alkyl group, an unsubstituted or substituted C2-8 alkenyl group, an unsubstituted or substituted C2-8 alkynyl group, an unsubstituted or substituted aryl group, an unsubstituted or substituted heterocyclic group, OR1, S(O)mR1, COR1, or CO2R1,
• R1 represents an unsubstituted or substituted amino group, an unsubstituted or substituted C1-8 alkyl group, an unsubstituted or substituted C3-8 cycloalkyl group, an unsubstituted or substituted C2-8 alkenyl group, an unsubstituted or substituted C2-8 alkynyl group, or an unsubstituted or substituted aryl group,
• m represents any one of integers of 0 to 2,
• n2 represents an integer of 0,
• Z represents a group represented by formula:
• Q1C(═O)NH— (in which Q1 represents a C5-6 alkenyloxy group, or a C4-7 alkynyloxy group, or a salt thereof.