Schizothyrium (genus)

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Schizothyrium_inaequale (= Zygophiala inaequalis) - a) culture on OA, b) fly speck symptoms on banana skin, c–f) conidiophores with conidia, g+h) conidia; bar = 10 µm (click on image to enlarge it)
Author(s): Liu Gao, Mian Zhang, Wanyu Zhao, Lu Hao, Hongcai Chen, Rong Zhang, Jean C. Batzer, Mark L. Gleason and Guangyu Sun
Source: PLoS ONE 2014, 9(10), art. e110717

Schizothyrium Desm. 1849 - (flyspeck diseases)

This genus of fungi includes around 50 species. Several of them cause flyspeck diseases of fruits like apples, pears and bananas. For example Schizothyrium pomi is common on apple in Europe and North America. The flyspeck marks are black, round, sclerotium-like bodies in which the hyphae are aggregated (hyphal knotting). The term "flyspeck" has been also used for diseases caused by other agents.

Asexual forms have been previously described under the genus Zygophiala. In these the conidiophores have a distinctive morphology, including a black and twisted stipe (see illustration on the right). Molecular analyses showed that the genus should be assigned to the order Capnodiales (Crous et al., 2009).

Currently, the following species have been entered into the system: