About Gnorimoschema baccharisella Busck, 1903
Gnorimoschema baccharisella Busck, 1903 is a species of moth that belongs to the Gelechiidae family. This moth was first described by August Busck in 1903. It is native to North America, and all confirmed records of the species are from California. For male individuals, the forewing length ranges from 6.2 to 8.5 millimeters, while female forewings measure between 6.5 and 9 millimeters in length. Adult moths are active in flight from mid-July through late November. The larvae of this moth feed on Baccharis pilularis, and their activity causes the formation of hard stem galls on the host plant. Pupation of this species occurs on the ground.
