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Diaporthe gulyae R.G. Shivas, S.M. Thompson & A.J. Young, 2011
This fungus has been reported from several regions as causing stem canker on sunflower. It has been originally described from Australia as causing a severe type of stem canker on sunflower and saffron thistle (Thompson et al., 2011). Soybeans can also become infected (Mathew et al., 2018). The fungus develops black pycnidia with ostiolate beaks and alpha conidia.