Canada thistle stem gall fly (Urophora cardui ) on Canada thistle (Cirsium arvense ) - 5358618

Canada thistle stem gall fly
Urophora cardui (Linnaeus)

Host: Canada thistle (Cirsium arvense (L.) Scop.)
Descriptor: Damage
Description: Gall from Canada thistle (Cirsium arvense), cut open to reveal damage caused by the larvae of the fly Urophora cardui, a biological control agent.
Image type: Field
Image location: United States

Photographer Information

Name: L.L. Berry
Country: United States

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Image Number: 5358618

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Image Citation:(?) L.L. Berry, Bugwood.org

Node Affiliation: Colorado State University

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Image uploaded on Friday, January 18, 2008
Image Information last updated on Tuesday, April 15, 2008