Leaf-mine: Mine long, linear, upper or lower surface, often adjoining a vein (Spencer, 1972: 74 (fig. 244), 79).

Long corridor, often following the midrib for some distance. The mine is upper- or lower-surface; often the first part lower-surface, then upper-surface. Frass in pearl chains or isolated granules. Pupation outside the mine; exit slit in the lower epidermis (Bladmineerders van Europa).

Larva: The white larva is illustrated in Bladmineerders van Europa.

Puparium: The black puparium is illustrated in Bladmineerders van Europa.

Phytomyza eupatorii puparium Image: Willem Ellis (Bladmineerders van Europa)

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: July-August.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Widespread in Britain - Surrey (Cosford Mill, Godalming) Cambridgeshire (Chippenham Fen), Norfolk (Norwich), Denbighshire (Cefn-y-bedd) (Spencer, 1972: 79) and Warwickshire (Fazeley and Hawkesbury) (Robbins, 1991: 113); Cambridgeshire (NBN Gateway - N.B. includes Watsonian Vice Counties having publicly available records that fall within or overlap the vice county border at 10km resolution or better i.e. a record for a vice county may relate to an adjacent vice county - for included datasets see NBN Grid map below).

NBN Grid map: Note that not all datasets on the NBN Gateway may be available on the map below. If you are an NBN Gateway registered user you can request access for missing datasets via the link 'Open interactive map in new window' below.

Distribution elsewhere: Widespread in continental Europe including The Netherlands (Bladmineerders van Europa), Belgium (de Bruyn and von Tschirnhaus, 1991), Czech Republic, French mainland, Germany, Lithuania and Poland (Martinez in Fauna Europaea).

NBN interactive distribution map(s) of known host species in Great Britain and Ireland and elsewhere:

Parasitoids in Britain and elsewhere: