Bull Thistle Cirsium vulgare (Savi) Tenore


Urophora stylata
(L.)

DESCRIPTION: Fly - 4 to 8 mm dark bodies, clear wings with D-shaped bands
BACKGROUND LIFE CYCLE
Availability Habitat Adult Emergence Egg Laying Larva Development F1 Adult Life Span Over Winters
G Wherever Bull thistle is established June July into flower head Flower head   1 to 2 months Larvae in seed head galls
ATTACK COLLECTION NOTES
Stage Damage Life Stage Method Adult males emerge in early June to establish territories.
Larva - Seed head Larvae late August to November Clip seed head


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