A pyridone derivative represented by Formula [1] or an agriculturally acceptable salt thereof:
wherein R
1
is a C
1-6
alkyl group, a C
2-6
alkenyl group, a C
2-6
alkynyl group, or the like; R
2
and R
3
are each independently a hydrogen atom, a nitro group, a cyano group, or the like; and A is a group represented by Formula A-1, Formula A-2, Formula A-3, Formula A-4, or Formula A-5:
The compounds represented by general formula [1] control various weeds growing in upland fields, orchards, paddy fields, and non-crop lands while showing high safety to useful plants and crops.