Plant Parasites of Europe

leafminers, galls and fungi

Thiodia torridana

Thiodia torridana (Lederer, 1859)


Full depth, transparent, very irregular, quite broad corridor or elongate blotch, usually descending from the leaf tip. Much granular frass, concentrated in the first section of the mine and along the sides. After hibernation the larva vacates its mine, spins some leaves together and causes window feeding.

host plants

Asteraceae, oligophagous

Aster amellus; Galatella sedifolia.

Records of other host plant (Aster novi-belgii; Hieracium; Silene; Solidago canadensis; Succisa) are probably incorrect (Hering, 1960a; see also the extensive discussion by Erwin Rennwald on Lepiforum).


Larvae from September till May; the larva hibernates in the mine.


Not known from the Benelux countries (Fauna Europaea, 2009).

distribution within Europe

From Germany to Italy, and from France to the Ukraine (Fauna Europaea, 2009); also the former CSSR (Hering, 1960a).


The description of the larva by Swatschek is based on material collected on Scabiosa, therefore probably applies to a different species.


Foveifera, Rhyacionia, Thiodia, hastana (Hübner, 1799).


Disqué (1905a), Hering (1960a), Kasy (1987a), Lepiforum (2019), Nel (2002a), Swatschek (1958a).

Last modified 29.ii.2020