Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
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"Acalyptratae"
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Tephritoidea
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Tephritinae
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Urophora
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Bull Thistle Gall Fly (Urophora stylata)
Species
Urophora stylata
- Bull Thistle Gall Fly
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
stylata
(Bull Thistle Gall Fly)
Other Common Names
Seedhead Gall Fly
Size
males 4-5 mm, females larger
Food
on Bull Thistle (
Cirsium vulgare
)
Life Cycle
Eggs hatch in 5-8 days. Third instar larvae overwinter in galls and pupate in June. Adults live about two months.
Remarks
Introduced to BC from Europe in 1973
Internet References
Fact sheet
by D.W. Pierce
(
1
)
Biocontrol of Bull Thistle in CA
Works Cited
1.
Integrated Weed Control Project: Biological control agents
Contributed by
John F. Carr
on 9 January, 2010 - 3:52pm
Additional contributions by
Beatriz Moisset
,
v belov
Last updated 17 August, 2016 - 6:45pm