A carboxamide compound represented by the formula (I):
[wherein Q represents a nitrogen-containing 5-membered heterocyclic group optionally fused with a benzene ring, R
1
represents a C1-C3 alkyl group or the like, R
2
represents a hydrogen atom or the like, and R
3
represents a hydrogen atom.] has an excellent plant disease controlling effect.
A carboxamide compound represented by the formula (I):
[wherein Q represents a nitrogen-containing 5-membered heterocyclic group optionally fused with a benzene ring, R
1
represents a C1-C3 alkyl group or the like, R
2
represents a hydrogen atom or the like, and R
3
represents a hydrogen atom.] has an excellent plant disease controlling effect.