Plant Parasites of Europe

leafminers, galls and fungi

Bayeriola thymicola

Bayeriola thymicola (Kieffer, 1888)

on Thymus

Bayeriola thymicola: galls on Thymus spec.

Thymus spec., France, dép. Hérault, Brissac © Ben van As

Bayeriola thymicola: galls on Thymus spec.


Bayeriola thymicola: gall on Thymus spec.

Thymus spec., Belgium, prov. Namur, Couvin, Frasnes-lez-Couvin, RN Tienne du Lion © Stéphane Claerebout: most galls are terminal

Bayeriola thymicola: gall on Thymus spec.

sometimes two together

Bayeriola thymicola: gall on Thymus spec.

combined with a misshaped inflorescence

Bayeriola thymicola: gall on Thymus spec.

according to the literature the gall usually houses but a single larva, but ten inspected galls all contained several inhabitants

Bayeriola thymicola: larvae

Thymus spec., Spain, Barcelona © Sébastien Carbonnelle


Strongly hairy rosette galls, 1-2 cm ø, at the end of the twigs. The red larva pupate within the gall in a white cocoon. Bivoltine.

host plants

Lamiaceae, monophagous

Thymus granatensis, hyemalis, mastichina, membranaceus, praecox subsp. polytrichus, pulegioides & subsp. chamaedrys + pannonicus, serpyllum, sibthorpii, striatus, vulgaris.


Cecidomyia, Bayeria, Janetiella, Wachtliella, thymicola.

parasitoids, predators

Mesopolobus diffinis.


Askew, Blasco-Zumeta & Pujade-Villar (2001a), Béguinot (2002h, 2003a,b, 2012a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Bruun, Jørgensen & Skuhravá (2012a), Buhr (1965a), Cogolludo (1921a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Gagné (2010a), Houard (1909a), Kieffer (1888a, 1891a), Redfern & Shirley (2011a), Roskam (2009a), Roskam & Carbonnelle (2015a), Rübsaaamen (1916a), Salas-Remón, Llimona, Lozano ao (2015a), Sánchez, Skuhravá & Skuhravý (2012a), Simova-Tošić & Skuhravá (2001a), Simova-Tošić, Skuhravá & Skuhravý (1996a, 2000a, 2004a, 2007a), Simova-Tošić, Skuhravá, Skuhravý & Postolovski (2007a), Skuhravá & Skuhravý (1997a,b, 1999a, 2008a, 2010a, 2021a: 280), Skuhravá, Skuhravý, Blasco-Zumeta & Pujade-Villar (2006a), Skuhravá, Skuhravý & Buhr (2013a), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý, Dončev & Dimitrova (1991a, 1992a), Skuhravá, Skuhravý & Hellrigl (2001a, 2002a), Skuhravá, Skuhravý & Kettani (2017a), Skuhravá, Skuhravý & Meyer (2014a), Skuhravá, Skuhravý & Neacsu (1972a), Skuhravý & Skuhravá (1994a, 1999a), Skuhravá, Skuhravý, Skrzypczyńska & Szadziewski (2008a)m Tavares (1905a), Tomasi (2003a, 2014a).

Last modified 15.v.2022