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Species Urophora affinis - Knapweed Gall Fly

Fruit Fly - Urophora affinis - female MT26 - Urophora affinis Knapweed Gall Fly - Urophora affinis - female Knapweed Gall Fly - Urophora affinis - male Family Tephritidae - Fruit Flies - Urophora affinis - female Colorful Drosopholid(?) on glass - Urophora affinis - male Fly - Urophora affinis - male Missoula Tephritidae? - Urophora affinis - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Tephritoidea
Family Tephritidae (Fruit Flies)
Subfamily Tephritinae
Tribe Myopitini
Genus Urophora
Species affinis (Knapweed Gall Fly)
Size
3-4 mm
Range
native to Europe, introduced in NA
Life Cycle
overwinters as larvae in the seedheads. Pupation is in the spring, adults emerge in mid to late spring. After mating, eggs are laid between bracts on closed flower buds.
Remarks
Introduced from Europe in 1971 to control knapweed (Centaurea spp.), commercially available in some states.
See Also
U. quadrifasciata has more extensive wing markings
Internet References
Fact sheets: by R. Lang(1), by J. Dawson(2)