The dot moth (Melanchra persicariae) is a moth of the family Noctuidae.The distribution area ranges from Spain in the West to Korea and Japan.It is found throughout Europe apart from the south-east.To the North it is found in Scotland and southern Fennoscandia,East through southern Russia, the Russian Far East and Siberia and Central Asia to the Kamchatka peninsula. Then Northern China to Korea and Japan.The southern boundary runs through northern Spain, Italy (except for Sicily), Macedonia, Bulgaria, Asia minor, the southern Caucasus, northern Iran,In the Alps it rises up to about 1000 m.