Rhagoletis indifferens

Common name  

western cherry fruit fly

Description

Typical of Rhagoletis larvae with the following specific characteristics for the 3rd instar:

Head. Stomal region: One small, blunt sclerotized stomal guard present. Short oral ridges present; number of oral ridges 5-13; margins entire. Accessory plates absent.

Anterior spiracles. Anterior spiracles convex to flat. Number of anterior spiracular tubules 7-19; in a single irregular row.

Spinules and creeping welts. Dorsal spinules on segments with an unusual distribution; usually on T3-A6, but very hard to see.

Caudal segment (A8) and anal lobes. Anal lobes plainly visible, but not protuberant.

Posterior spiracles. Slits 2.8-3.5x longer than wide. Dorsal spiracular processes long, with numerous trunks. Number of dorsal spiracular processes 11–14. Number of ventral spiracular processes 11–14. Number of lateral spiracular processes 8–12.

Host plants

Family	Genus
Rosaceae	Prunus

Part of plant attacked: fruit.

Biogeographic region and distribution

Nearctic

Canada and USA (British Columbia, Montana and Colorado south to n. California and New Mexico).
 

Adult taxonomy

Rhagoletis indifferens Curran
Rhagoletis indifferens Curran 1932: 8.—USA. Oregon: Hood River. HT ♂ AMNH.
Rhagoletis cingulata: Wilson & Lovett 1913: 160.—misid.
 

References

Carroll, L. E., A. L. Norrbom, M. J. Dallwitz, and F. C. Thompson. 2004 onwards. Pest fruit flies of the world – larvae. Version: 8th December 2006. http://delta-intkey.com.

White, I. M., and M. M. Elson-Harris. 1992. Fruit flies of economic significance: their identification and bionomics. CAB International; Wallingford, UK. 601 p.