Plant Parasites of Europe

leafminers, galls and fungi

Matthiola

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

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

Tables for all parasites per species

Last modified 10.vi.2020