Leucoptera spartifoliella is a species of moth in family Lyonetiidae known by the common name Scotch broom twig miner. It is used as an agent of biological pest control against the noxious weed known as Scotch broom (Cytisus scoparius). The adult is a tiny white moth about four millimeters long. It lays eggs one at a time on the stem of Scotch broom, its host plant. The larva burrows throughout the epidermis of the stem for nearly a year before it pupates, causing damage to the plant.