Diaporthe oncostoma

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Diaporthe oncostoma - a-c) conidiomata, d-g) conidiogenous cells and conidia - scale bars b) = 225 μm, all others = 10 μm (click on image to enlarge it)
Author(s): R.R. Gomes, C. Glienke, S.I.R. Videira, L. Lombard, J.Z. Groenewald and P.W. Crous
Source: Persoonia (2013) 31 p. 27

Diaporthe oncostoma (Duby) Fuckel 1870

This fungus has caused outbreaks of stem canker on black locust trees (Robinia pseudoacacia) in several countries, e.g. see Vajna (2002). However, in studies with other host plants, it has been mainly found to be saprobic or have a low virulence.

For a taxonomic review see Gomes et al. 2013.