Plant Parasites of Europe

leafminers, galls and fungi

Agrilus biguttatus

Agrilus biguttatus (Fabricius, 1776)

two-spotted oak buprestid, oak jewel beetle

on Quercus, etc.


long, zigzagging gallery under the bark, mostly in horizontal directions. This interrupts the sap stream and may kill the tree. According to Buhr sometimes strong callus formation occurs, resembling galling.


Fagaceae, oligophagous

Castanea sativa; Fagus sylvatica; Quercus cerris, dalechampii, faginea, frainetto, macrocarpa, petraea, pubescens, pyrenaica, robur.


during the last decennia the species has strongly increased in abundance, and plays a significant role in oak dieback. Its presence can be ascertained by the characteristic exit holes in the bark, having the shape of a capital “D”.


see Bilý.


Arnáiz Ruiz & Bercedo Páramo (2005b), Bilý (1999a), Buhr (1965a), Evangelista & Cristiano (2013a), Fiala (2017a), Moraal (1997a), Moraal & Hilszczanski (2000a), Murria Beltrán & Murria Beltrán (2005a), Panin, Săvulecu & Ruicănescu (2015a), Sakalian (2003a), Škorpík, Křivan & Kraus (2011a), Verdugo (2005a), Verdugo Páez (2002a).

Last modified 8.iv.2021