Clarireedia homoeocarpa

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Clarireedia homoeocarpa - A) sterile apothecia, B) apothecia on colonial bentgrass (Agrostis capillaris) seeds, C) apothecia from colonial bentgrass seed culture, D) apothecia, E) germinating ascospores - scale bars: A+B = 5 mm, D = 1000 µm, E = 50 µm
Authors: Catalina Salgado-Salazar et al.
Source: Fungal Biology (2018) 122, p. 770
B) dollar spot disease symptoms on red fescue (Festuca rubra) in the United Kingdom, E) apothecia on sea marsh fescue (Festuca sp.) in the United Kingdom
Author: Noel Jackson
Source: Fungal Biology (2018) 122, p. 762

Clarireedia homoeocarpa (F.T. Benn.) L.A. Beirn, B.B. Clarke, C. Salgado & J.A. Crouch 2018

Before 2018, this fungus was regarded as the causal agent of dollar spot diseases (under the name Sclerotinia homoeocarpa), with a global distribution and being pathogenic to different types of turf grasses. These diseases are now known to be caused by a complex of several closely related species, differing in their DNA structure, host plant preferences and geographic distribution (Salgado-Salazar et al., 2018), see the genus Clarireedia.

Clarireedia homoeocarpa (= Sclerotinia homoeocarpa) has a restricted distribution, being confined to the United Kingdom, as well as to a narrow host range, infecting mainly red fescue (Festuca rubra). This means that most reports and studies of dollar spot before 2018, referring to Sclerotinia homoeocarpa, have covered other species from the genus Clarireedia.

Sclerotinia homoeocarpa