Plant Parasites of Europe

leafminers, galls and fungi

Trachys minutus

Trachys minutus (Linnaeus, 1758)

on woody plants

Trachys minutus: young mines on Crataegus monogyna

Crataegus monogyna, Belgium, prov. Limbourg, Maasmechelen, Maaswinkel, © Carina Van Steenwinkel: three (very) young mines

Trachys minutus: mine on Corylus avellana

Corylus avellana, Belgium, prov. Namur, Lavaux-Sainte-Anne, Gros Tienne,7.ix.2013 © Carina Van Steenwinkel

Trachys minutus: mine on Salix alba

Salix alba, Hungary, Halászi, 26.v.2018 © László Érsek

Trachys minutus: mine on Salix alba

the pupa lies in the mine without a cocoon

Trachys minutus: mine on Salix cinerea

Salix cinerea, Belgium, prov. Antwerp, Mol, © Carina Van Steenwinkel

Trachys minutus: larva in mine

same leaf, larva in the mine

Trachys minutus: pupa in mine

a few days later, the larva has pupated


Ulmus minor, Susteren, 25.vii.2002

Trachys minutus larva

Salix spec., België, prov. Limbourg, de Hoefaert-Lanaken, © Carina Van Steenwinkel: larva, dorsal

Trachys minutus pupa

fresh pupa (it will turn later to almost black)

Trachys minutus: mine on Tilia spec.

Tilia spec., Belgium, prov. Limburg, Zelem, Sint-Jansberg, 4.vii.2017 © Carina Van Steenwinkel

Trachys minutus: occupied mine on Tilia spec.

this mine bears a treacherous similarity with the one of Roeslerstammia erxlebella,

Trachys minutus: occupied mine on Tilia spec.

but the droplet,

Trachys minutus: larva in mine on Tilia spec.

and the spotted larva make the difference


Full depth blotch, invariably beginning at the leaf tip or the tip of a leaf lobe or tooth. Oviposition site covered by a black, shining drop of hardened secretion. Frass generally in long threads, but sometimes in elongated granules. Pupa in the mine, not in a cocoon.

host plants

polyphagous on woody plants

Acer campestre; Betula; Carpinus betulus; Corylus avellana; Crataegus monogyna; Frangula alnus; Malus sylvestris; Prunus; Pyrus communis; Quercus; Salix alba, aurita, caprea, cinerea & cinerea subsp. oleifolia, myrsinifolia; Sorbus aria, aucuparia; Tilia cordata, platyphyllos; Ulmus laevis, minor.

Starý (1930a) also mentions Populus tremula.


Larvae found between mid May and mid August. According to Robbins (1991a) bivoltine: early summer and late summer.


BE observed (Fauna Europaea, 2007).
NE observed (Vorst, 2009a); uncommon, mainly found in the southern and eastern parts of the country.
LUX observed (Ellis).

distribution within Europe

All of Europe except Ireland (Fauna Europaea, 2007).




Trachys minuta.


Hibernation as imago, in the leaf litter (Bilý, 2002a).


Beiger (1979a), Bilý (1982a, 1993a, 1994a, 1999a, 2002a), Brechtel & Kostenbader (200a), Buhr (1933a, 1964a), Cobos (1986a), Csóka (2003a), Drăghia (1972a), Haase (1942a), Hartig (1939a), Hering (1923a, 1930a,e, 1932g, 1957a), Kollár (2007a), Kollár & Hrubík (2009a), Maček (1999a), Michalska (1972a, 1976a), Murria Beltrán & Murria Beltrán (2005a), Niehuis (2004a), Panin, Săvulecu & Ruicănescu (2015a), Robbins (1991a), Sakalian (2003a), Sánchez Sobrino & Tolosa Sánchez (2005a), Schaefer (1949a), Skala (1951a), Škorpík, Křivan & Kraus (2011a), Stammer (2016a), Starý (1930a), Stolnicu (2008a), Théry (1942a), Tomov & Krusteva (2007a), Ugarte San Vicente (2005a), Ugarte san Vicente, Zabalegui & Salgueira Cerezo (2006a), Ureche (2010a), Verdugo (2005a), Vorst (2009a).

Last modified 9.iv.2021