Plant Parasites of Europe

leafminers, galls and fungi

Calonectria pseudonaviculata

Calonectria pseudonaviculata (Crous, Groenewald & Hill) Lombard, Wingfield & Crous, 2010

boxwood blight

on Buxus


Initially light brown, dark-eded leaf spots, turning entirely blackish brown, mainly on the younger leaves. Later also elongated dark brown lesions on the young twigs. Massive leaf drop. Condia rodlike, 4-6 x 42-68 µm, 1-septate, united by slime into cylindrical bundles. Condiophores with 95-155 µm long appendages that terminate in a spearlike bladder.

host plants

Buxaceae, monophagous

Buxus sempervirens.

distribution within Europe

PESI (2023).


Cylindrocladium buxicola Henricot, 2002.


Brand (2005a), Henricot (2009a), Henricot & Culham (2002a), van Kuik & van Dalfsen (2010a), Lehtijärvi, Doğmuş-Lehtijärvi & Oskay (2014a).

Last modified 5.ix.2023