Urophora stylata (F.)

Plant species attacked: Bull thistle
Biocontrol Agent Type: Seedhead gall producing fly
Country of Origin: The populations released in BC originated in Germany and Switzerland
First Released in BC: 1973
Click on image to view larger photo: Urophora stylata larvae Urophora stylata female
Positive monitoring and/or dispersal locations in BC on Bull and Canada thistle:
(click image to view larger map)
Established Urophora stylata on Bull thistle locations Established Urophora stylata on Canada thistle locations
View the in-depth Urophora stylata information page here