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.
A carboxamide compound represented by the formula (1):
[wherein
Q represents a nitrogen-containing 6-membered aromatic heterocyclic group optionally fused with a benzene ring, one of ring constitutional atoms of the heterocyclic group is a nitrogen atom and the heterocyclic group may be substituted with a group selected from the group consisting of a C1-C3 alkyl and the like,
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 or the like]
and a plant disease controlling agent comprising this as an active ingredient.