Sisymbrium hedge mustard, rocket
(For a dichotomous table for galls on Sisymbrium by Hans Roskam click here)
Dichotomous table for leafminers
1a mine either begins or ends in stem, petiole or midrib => 2
1b mine at most on the midrib, otherwise free in the leaf => 4
1c galls, etc => Tables for all parasites per species
Dichotomous table for leafminers
1a mine either begins or ends in stem, petiole or midrib => 2
1b mine at most on the midrib, otherwise free in the leaf => 4
1c galls, etc => Tables for all parasites per species
2a larva with chitinised head; mine begins on a galled and swollen part of stem or petiole => 3
2b larva a maggot; petiole normal: Scaptomyza flava
3a galled swelling of the stem conspicuous, containing ca. 3 larvae: Ceutorhynchus napi
3b galled swelling weak, usually containing 1 larva: Ceutorhynchus rapae
4a mine full depth; larva with chitinised head: Ceutorhynchus minutus
4b mine upper- or lower-surface (small patches sometimes full depth); larva a maggot => 5
5a corridor from start to end => 6
5b irregular blotch, preceded by a narrow corridor (may be overrun): Scaptomyza flava
6a broad corridor upon the midrib, pinnately branched: Liriomyza strigata
6b corridor little branched, not pinnate, not associated with the midrib => 7
7a puparium in the mine in a, usually lower-surface, pupal chamber; frass in discrete grains: Chromatomyia horticola
7b larva leaves the mine before pupation through a semicicular exit slit; frass in thread fragments => 8
8a larva: rear spiraculum with 3 papillae: Liriomyza brassicae
8b rear spiraculum with 7-12 papillae: Liriomyza bryoniae
Not included in the key: Apterona helicoidella; Liriomyza xanthocera; Ophiomyia beckeri; Phytomyza rufipes; Plutella xylostella; Scaptomyza griseola.