Caryocolum viscariella is a moth of the family Gelechiidae. It is found in Ireland, Great Britain, Fennoscandia, Denmark, Germany, France, Switzerland, Austria, Hungary, Italy, Estonia and Russia.
The wingspan is about 12 mm.[1] The head is dark fuscous, mixed with whitish-fuscous. Terminal joint of palpi shorter than second. Forewings deep ochreous-brown, much mixed with dark fuscous; a dark spot on fold near base ; stigmata black, indistinct, plical separating two obscure paler triangular dorsal blotches ; a slightly angulated sometimes interrupted whitish-ochreous fascia at 3,4. Hindwings grey. Larva dull green; dorsal line darker; head black ; 2 reddish=grey, plate black, bisected: in spun shoots.[2] [3] [4] [5]
Adults are on wing from June to July in one generation per year.[6]
The larvae feed on Silene dioica, Silene alba and Lychnis viscaria. The larvae can be found from April to June.