Coniothyrium fuckelii

Coniothyrium fuckelii is a fungal plant pathogen, causing stem canker, and that has also been known to cause infections in immunocompromised humans.

Two diseases most commonly associated with garden rose dieback are grey mould (Botrytis cinerea) and also rose canker (Coniothyrium fuckelii, syn. Paraconiothyrium fuckelii and Leptosphaeria coniothyrium). The fungal infection of rose canker often occurs through badly timed pruning cuts or injuries to the crown of the rose plant. It then produces tiny black fruiting bodies that are only just visible on the bark of affected branches or stems. This fungus also causes cane blight disease of raspberry bushes.