knapweed seed head fly (Urophora quadrifasciata) in EDDMapS Representative Photos

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knapweed seed head fly (<em>Urophora quadrifasciata</em>) adult(s)

Biological Control of Weeds in the West Field Guide , Western Society of Weed Science, Bugwood.org

knapweed seed head fly (Urophora quadrifasciata) adult(s)

knapweed seed head fly (<em>Urophora quadrifasciata</em>) adult(s) on spotted knapweed (<em>Centaurea stoebe ssp. micranthos</em>)

Robert D. Richard, USDA APHIS PPQ, Bugwood.org

knapweed seed head fly (Urophora quadrifasciata) adult(s) on spotted knapweed (Centaurea stoebe ssp. micranthos)

knapweed seed head fly (<em>Urophora quadrifasciata</em>) adult(s) on spotted knapweed (<em>Centaurea stoebe</em>)

Laura Parsons, University of Idaho, PSES, Bugwood.org

knapweed seed head fly (Urophora quadrifasciata) adult(s) on spotted knapweed (Centaurea stoebe)

in spotted knapweed seed head

USDA Agricultural Research Service , Bugwood.org

in spotted knapweed seed head

in seedhead

University of Idaho , Bugwood.org

in seedhead

knapweed seed head fly (<em>Urophora quadrifasciata</em>) adult(s)

USDA Agricultural Research Service , Bugwood.org

knapweed seed head fly (Urophora quadrifasciata) adult(s)