Mycosphaerellales » Mycosphaerellaceae » Ragnhildiana

Ragnhildiana agerati

Ragnhildiana agerati (F. Stevens) F. Stevens & Solheim, Mycologia 23(5): 402 (1931).

Cercospora agerati F. Stevens, Bulletin of the Bernice P. Bishop Museum, Honolulu, Hawaii 19: 154 (1925).

Index Fungorum number: IF 158681; Facesoffungi number: FoF 11212, Fig. 1

Description: see Solheim (1931); Videira et al. (2017).

Material examined: see Solheim (1931); Videira et al. (2017).

Fig. 1 Ragnhildiana agerati (redrawn from Solheim 1931). a Conidiophores and conidia. b Conidia. Scale bars: a, b = 10 µm.

Importance and distribution

Ragnhildiana comprises six species known from eight host plants and five plant families namely Asteraceae, Caryophyllaceae, Juglandaceae, Ranunculaceae and Vitaceae. Ragnhildiana was reported from Asia (Thailand, Turkmenistan), Europe (Germany, New York) and the United States (Texas). Species of Ragnhildiana species are pathogenic causing brown leaf spots. They are responsible for losses in pecan orchards and other ornamental crops (Poletto et al. 2020).



Crous PW, Braun U. 2003 – Mycosphaerella and its anamorphs: 1. Names published in Cercospora and Passalora. CBS Biodiversity Series No. 1. Westerdijk Fungal Biodiversity Institute, Utrecht, the Netherlands.

Muntañola M. 1960 Algunos hyphomycetes criticos, notas y descripciones. - Lilloa 30, 165232.

Poletto T, Muniz M, Lucio AD, Fantinel VS, Heldwein AB, Reiniger L, Blume E. 2020 – Diagrammatic scale for quantifying severity of brown leaf spot on Carya illinoinensis. Anais da Academia Brasileira de Ciencias 92, e20180889.

Solheim WG, Stevens FL. 1931 – Cercospora Studies – II. Some Tropical Cercosporae, Mycologia 23, 365–405.

Videira SIR, Groenewald JZ, Nakashima C, Braun U, Barreto RW, de Wit PJGM, Crous PW. 2017 –Mycosphaerellaceae - Chaos or clarity? Studies in Mycology 87, 257–421.


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