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Thistle Stem Gall Fly

Urophora cardui

Classification

Class
Insecta
Order
Diptera

Urophora cardui or the Canada thistle gall fly is a fruit fly which, contrary to its common name, is indigenous to Central Europe from the United Kingdom east to near the Crimea, and from Sweden south to the Mediterranean. Distribution The Canada thistle gall fly has been introduced to North America from Europe to control the population of its host plant, Canada, or creeping thistle, which is an invasive, introduced weed in North America. Life cycle The fly starts life as an egg, one to thirty of which are laid on the stems of its host plant, the Canada or creeping thistle (Cirsium…

Distribution

Dick Belgers · CC BY
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Countries in the Picchu catalog
Netherlands · 1,478United Kingdom · 675Germany · 151France · 59Belgium · 51Luxembourg · 6Italy · 1