Plant Parasites of Europe

leafminers, galls and fungi

Pityophthorus juglandis

Pityophthorus juglandis Blackman, 1928

on Juglans

walnut twig beetle


Larvae and adults bore in the bark of thick branches.

host plants

Juglandaceae, monophagous

Juglans regia.

distribution within Europe

Mexican and North American species, recorded in Italy.


Vector of the fungus Geosmithia morbida Kolařík, Freeland, Utley & Tisserat, 2010, causer of the “thousand cankers disease” that kills a tree in 2-4 years.


Boomsluiter (2014a), Faccoli, Simonato & Rassati (2016a).

Last modified 29.x.2020