Pegomya bicolor (Wiedemann, 1817)
mine
Large blotch, theoretically upper-surface, but often virtually full depth, often preceded by a short, broad corridor. Usually several larvae in a mine. The larvae can leave their mine and make a new one elsewhere. At the start of the first mine a small group of oval, whitish, egg shells. Pupation outside the mine.
host plants
Polygonaceae, oligophagous
Fagopyrum tataricum; Oxyria; Persicaria amphibia, hydropiper, maculosa; Rumex acetosa, acetosella, alpinus, conglomeratus, crispus, longifolius, multifidus, obtusifolius.
Mainly on Persicaria (Hering, 1957a). Also observed in botanical gardens on Oxyria digyna and Begonia by Hering (1924b, 1930b).
Godfray (1986a) reared Pegomya‘s from a number of Rumex species, and obtained only from R. acetosa 30% adults of bicolor.
Xenophagously bred from Begonia (Hering, 1957a).
phenology
Several generations (Hering, 1957a).
BENELUX
BE recorded (Gosseries & Ackland, 1991a).
NE recorded (de Meijere, 1939a).
LUX not recorded (Fauna Europaea, 2008).
distribution within Europe
Entire Europe (Fauna Europaea, 2008).
larva, puparium
see Dušek (1970a), Stork (1936a).
cephalic skeleton of P. bicolor; from Dušek (1970a)
for comparison: cephalic skeleton of P. solennis
synonyms
Pegomya jynx Séguy, 1926; P. cinereorufa (Ringdahl, 1930).
notes
according to Hering (1957a) the species is very numerous on Persicara (“non-winding Polygonum”); he distinguishes the larva from the one of P. solennis by the presence of a small apical protuberance. However, this is not mentioned by Dušek in het revision of the larvae of Pegomya; the difference in the cephalic skeletons is definite.
references
Amsel & Hering (1933a), Beiger (1958a, 1960a, 1965a, 1970a, 1979a), Beuk, Prijs & de Jong (2002a), Buhr (1933a, 1941b, 1964a), Darvas, Skuhravá & Andersen (2000a), Dušek (1970a), Eiseman (2018a), van Frankenhuyzen, Houtman & Kabos (1982a), Godfray (1986a), Gosseries & Ackland (1991a), Hering (1923a, 1924b, 1930b, 1957a), Huber (1969a), Huckett (1971a), Kabos (1975a), Maček (1999a), de Meijere (1939a), Michalska (1970a, 1976a), Nowakowski (1954a), Ostrauskas, Pakalniškis & Taluntytė (2003a), Robbins (1991a), Sønderup (1949a), Starý (1930a), Stork (1936a), Suwa (1974a), Teschner (1999a), Zoerner (1969a).