Matthiola stock
(For a dichotomous table for galls on Matthiola by Hans Roskam click here)Dichotomous table for leafminers
1a pinnately branched gallery, main and side branches on top of the midrib and side veins: Liriomyza strigata
1b blotch, or little, not pinnately, branched gallery; mine not determined by the leaf venation => 2
1c galls, etc => Tables for all parasites per species
Dichotomous table for leafminers
1a pinnately branched gallery, main and side branches on top of the midrib and side veins: Liriomyza strigata
1b blotch, or little, not pinnately, branched gallery; mine not determined by the leaf venation => 2
1c galls, etc => Tables for all parasites per species
2a larva a maggot; mine partly or entirely upper- or lower-surface => 3
2b larva with chitinised head; mine full depth => 6
3a gallery from start to end => 4
3b blotch, may begin with a gallery => 5
4a pupation within the mine, in a, generally lower-surface, pupal chamber; frass in well-spaced grains: Chromatomyia horticola
4b pupation external; frass in strings: Liriomyza brassicae
5a frass powdery, in dark green “clouds” in corners of the mine, often visibly only after the mine has been opened: Scaptomyza flava
5b frass in black strings: Liriomyza xanthocera
6a larva with prolegs; older larvae live free at the underside of the leaf: Plutella xylostella
6b no prolegs; larvae mine all their life => 7
7a larva with thoracic legs: Phyllotreta nemorum
7b larva without legs: Ceutorhynchus minutus
Not included in the key: “Xenostrongylus histrio palaestinensis”