Plant Parasites of Europe

leafminers, galls and fungi



Incl. Cacalia.

(For a dichotomous table for galls on Adenostyles by Hans Roskam click here)

Dichotomous table for leafminers

1a mine full depth; larva with thoracic feet and a sclerotised head =>2

1b mine upper- or lower-surface; larva a maggot => 3

1c galls, etc => Tables for all parasites per species

2a alpine species; pinacula black: Cnephasia sedana

2b lowland species; pinacula colourless (only the base of the setae black): Cnephasia incertana

3a first part of the mine a long, very narrow corridor; in the later part of the mine primary and secondary feeding lines are conspicuous => 4

3b mine different; no conspicuous feeding lines => 5

4a the first, corridor-part of the mine girdles a part of the leaf, that turns brown and withers; here a large blotch is made: Stemonocera cornuta

4b no girdling; the later part of the mine is a broad corridor, centered over the midrib: Trypeta zoe

5a pupation within the mine; the front spiracula of the puparium penetrate the epidermis => 6

5b pupation outside the mine; the larva leaves the mine by a semicircular slit in the epidermis =>7

6a corridor whitish (when illuminated from above), not conspicuously long; frass in dispersed grains: Chromatomyia cf. syngenesiae

6b corridor yellowish, up to 20 cm long; frass in long pearl chains: Phytomyza farfarae

7a corridor entirely upper-surface: Phytomyza tussilaginis

7b first part of the corridor lower-surface, often stellate: Phytomyza adenostylis

Tables for all parasites per species

Last modified 5.v.2020