Dark Pine Knot-horn

Dioryctria abietella is a moth of the family Pyralidae. It is found in Europe.

The wingspan is 27–33 mm.The forewings are fuscous, irrorated with whitish and dark fuscous; first and second lines whitish, dark-edged, waved, nearly parallel, hardly oblique; two darker shades rather before and beyond first line, not reaching costa; a small whitish discal spot, suffusedly darker-edged. Hindwings in male whitish-fuscous, in female light fuscous, darker terminally. Larva dark grey or reddish-brown; dorsal line double, pale; lateral and spiracular lines pale; head and plate of 2 dark brown: in shoots of Pinus sylvestris, not causing resinous exudation.