Pegomya flavifrons (Walker, 1849)

Pegomya flavifrons on Stellaria media

Stellaria media, Nieuwendam

Pegomya flavifrons on Cerastium glomeratum

Cerastium glomeratum, Nieuwendam

Pegomya flavifrons: mine on Silene dioica

Silene dioica, Winterswijk

Pegomya flavifrons: mine on Silene vulgaris

Silene vulgaris subsp. vulgaris, Belgium, prov. Liège, Angleur; © Jean-Yves Baugnée

Pegomya flavifrons: mine on Stellaria holostea

Stellaria holostea, Bunderbos: larva in the mine

Pegomya flavifrons: start of mine

Stellaria holostea, Beuningen: start of the mine, with egg

mine

Each mine begins with one, rarely two, oval egg shells attached to the leaf underside. Sometimes a number of of young mines, and eggs, on one leaf. The first part of the mine is a tortuous corridor, quickly turning into a large blotch. Most of the blotch is full depth, only some patches are upper-surface, and greenish when lighted from behind. According to the literature copious frass in present in dispersed lumps. In my experience the larva -that then looks very dark- may accumulate all frass in its . The larva is capable of leaving its mine, and starting a new one elsewhere. These secondary mines can be recognised by the large hole that was made by the larva upon entering. Pupation outside the mine.

host plants

Caryophyllaceae, oligophagous

Cerastium fontanum subsp. triviale; Gypsophila repens; Moehringia trinervia; Myosoton aquaticum; Silene alba, coronaria, dioica, flos-cuculi, italica, noctiflora, vulgaris; Stellaria holostea, media, nemorum, sessiliflora.

Found by Hering (1932h, 1957a) also on Celosia cristata (Amaranthaceae).

phenology

Larvae in May-June and August-September (Hering, 1957a).

BENELUX

BE recorded (Gosseries & Ackland, 1991a).

NE recorded (de Meijere, 1939a).

LUX recorded (Ellis: Kautenbach).

distribution within Europe

Almost entire Europe, with possible exception of Ireland (Fauna Europaea, 2008).

egg

larva

puparium

Pegomya flavifrons: puparium

puparium (from Dušek)

synonyms

Pegomya albimargo (Pandellé, 1901); P. albimargo celosiae Hering, 1932; P. villeneuviana (Hendel, 1925), P. moehringiae Hennig, 1957.

notes

The mines can be difficult to separate from those of Scaptomyza graminum (unless egg shells are present), but the larvae are abundantly different.

Because the leaves are completely mined out, then wither and fall off, the mines may seem more rare than they in reality are.

references

Beiger (1965a, 1970a), Beuk, Prijs & de Jong (2002a), Buhr (1941b, 1964a), Dušek (1970a), Eiseman (2018a), van Frankenhuyzen, Houtman & Kabos (1982a), Gosseries & Ackland, (1991a), Haase (1942a), Hering (1924b, 1925a, 1932h, 1957a, 1961a, 1967a), Huber (1969a), Kabos (1975a), Maček (1999a), de Meijere (1939a), Michna (1975a), Niblett (1956a), Robbins (1991a), Séguy (1950a), Seidel (1957a), Skala (1951a), Sønderup (1949a), Surányi (1942a), Suwa (1974a), Zoerner (1969a, 1970a).

mod 3.iii.2019