Utah State University Extension
Spotted Wing Drosophila (SWD) is a new Utah pest (first found August, 2010) that can infest un-ripened (pre-harvest), ripe, over-ripe, and spoiled fruits.
Alston, Diane; Davis, Ryan; and Vorel, Cory, "Spotted Wing Drosophila (Espanol)" (2013). All Current Publications. Paper 1288.