Plant Parasites of Europe

leafminers, galls and fungi

Myagrum

Myagrum bird’s-eye cress

(For a dichotomous table for galls on Myagrum 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 => 5

3a gallery from start to end: Chromatomyia horticola

3b blotch, may begin with a gallery => 4

4a frass powdery, in dark green “clouds” in corners of the mine, often visibly only after the mine has been opened: Scaptomyza flava

4b frass in black strings: Liriomyza xanthocera

5a larva with prolegs; older larvae live free at the underside of the leaf: Plutella xylostella

5b no prolegs; larvae mine all their life => 6

6a larva with thoracic legs: Phyllotreta nemorum

6b larva without legs: Ceutorhynchus minutus

Not included in the key: Phytomyza rufipes.

Tables for all parasites per species

Last modified 28.v.2020