I was surprised to find that this article refers indirectly to a fly (Delia platura) collected from my little farm in Kasilof.
Savage, J., Fortier, A-M., Fournier, F., Bellavance, V. 2016. Identification of Delia pest species (Diptera: Anthomyiidae) in cultivated crucifers and other vegetable crops in Canada. Canadian Journal of Arthropod Identification No. 29: June 29, 2016. doi:10.3752/cjai.2016.29. URI:http://biologicalsurvey.ca/ejournal/sffb_29/sffb_29.html