Rorippa yellow-cress
Incl. Nasturtium, Sisymbrella, Watercress etc.
(For a dichotomous table for galls on Rorippa by Hans Roskam click here)
(For a dichotomous table for galls on Nasturtium 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 overlying the midrib, otherwise free in the leaf disc => 5
1c galls, etc. => Tables for all parasites per species
(For a dichotomous table for galls on Nasturtium 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 overlying the midrib, otherwise free in the leaf disc => 5
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 overlying the midrib, otherwise free in the leaf disc => 5
1c galls, etc. => Tables for all parasites per species
2a larva a maggot => 3
2b larva with chitinised head => 4
3a mine more or less a corridor, until it disappears into a thick vein: Phytomyza rufipes
3b corridor, turning into an irregular blotch on, and partly in, a thick vein: Scaptomyza flava
4a larva with thoracic feet; in autumn: Psylliodes napi
4b larva without thoracic feet; in spring: Ceutorhynchus pallidactylus
5a mine full depth; larva with chitinised head => 6
5b mine upper- or lower-surface (little patches may be full depth); larva a maggot => 8
6a small blotch, < 1 cm; larva, with abdominal feet, later lives free: Plutella xylostella
6b mine > 1 cm, a corridor or blotch; larva, without abdominal feet, remains in the mine until close to pupation => 7
7a larva without thoracic feet; mine an untidy corridor: Ceutorhynchus minutus
7b larva with thoracic feet; final part of the mine widening blotch-like: Phyllotreta nemorum
8a corridor from start to end => 9
8b irregular blotch, preceded by a narrow corridor (may be overrun): Scaptomyza flava
9a broad, pinnately branched corridor; main branch overlying the midrib; frass in strings; pupation outside the mine: Liriomyza strigata
9b corridor little branched, not pinnate, not associated with the midrib; frass in discrete grains; puparium in the mine, in a, usually lower-surface, pupal chamber: Chromatomyia horticola