Twelve
species of Solidago are recorded in Britain. These include
the native Goldenrod (S. virgaurea) and eleven introduced
Goldenrods including Canadian Goldenrod (S. canadensis) and
Early Goldenrod (S. gigantea).
The
agromyzids Liriomyza
sativae and Liriomyza
trifolii, polyphagous pest species of ornamental and vegetable
crops occasionally intercepted at UK points of entry, are recorded
on Solidago. Liriomyza
trifolii has been found under glass in England and Wales.
All populations have been and continue to be eradicated.
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A long, winding leaf-mine on the upper surface of the leaf, with
frass widely-spaced in conspicuous black lumps. Pupation internal,
at the end of mine. Puparium black or whitish-grey
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A conspicuous white mine with frass in more or less connected strips,
older mines can show a conspicuous reddish-violet discolouration.
Puparium black.
Mine
of Phytomyza solidaginis
on Solidago virgaurea. Image: Willem Ellis (Source: Nederlandse
bladmineerders)