* Taylor RK, Guilford PJ, Clark RG, Hale CN, Forster RLS (2001) Detection of Erwinia amylovora in plant material using novel polymerase chain reaction (PCR) primers. New Zealand Journal of Crop and Horticultural Science 29, 35-43.
* Allred DB, Jorgensen CD (1993) Hosts, adult emergence, and distribution of the apple maggot (Diptera: Tephritidae) in Utah. Pan-Pacific Entomologist 69: 236–246.
------- confirmed host.