Mycosphaerellales » Mycosphaerellaceae » Pseudocercosporella

Pseudocercosporella ipomoeae

Pseudocercosporella ipomoeae Sawada ex Deighton, Mycol. Pap. 133: 38 (1973).

            Index Fungorum number: IF 321749; Facesoffungi number: FoF 11208, Fig. 1

Description: see Frank et al. (2010) and Videira et al. (2017).

Material examined: see Frank et al. (2010) and Videira et al. (2017).

Fig. 1 Pseudocercosporella bakeri (CPC 17570, holotype, re-drawn from Fig. 9 in Frank et al. 2010). a Leaf spot on host. b Conidiophores in vivo. c, d Conidiophores in vitro (arrows denote loci). e Conidia in vitro. Scale bars = 10 μm.

Importance and distribution

There are 127 Pseudocercosporella epithets in Index Fungorum (2022), but several species have been transferred to other genera such as Cercoseptoria, Cercosporella, Cylindrosporium, Filiella, Heterosphaeria, Mycosphaerella, Neopseudocercosporella, Oculimacula, Pseudocercospora, Pseudophloeosporella, Ramulispora, Septoria, Sphaerulina and Thedgonia. Pseudocercosporella comprises 96 species known on several host plants such as Achillea millefolium (Asteraceae), Aconitum vulparia (Ranunculaceae), Allium subhirsutum (Amaryllidaceae), Apocynum androsaemifolium (Apocynaceae), Astragalus alpinus (Fabaceae), Dryopteris carthusiana (Dryopteridaceae), Ipomoea acuminata (Convolvulaceae), Phaseolus vulgaris (Fabaceae), Rubus ellipticus (Rosaceae), Triticum aestivum (Poaceae) and others. Pseudocercosporella has a wide distribution including Asia (Hong Kong, Kazakhstan, Nepal, Russia, South Korea), Europe (Bulgaria, France, Germany, Italy, Norway, Switzerland), North America (Canada, the  United States). Pseudocercosporella has high diversity but few species have molecular data. Future studies must aim to collect more taxa of Pseudocercosporella and identification must be done by molecular data.


Quarantine significance

Pseudocercosporella may be of quarantine concern as several species are pathogenic, for example, P. capsellae is the causative agent of white leaf spot disease in Brassicaceae (Gunasinghe et al. 2016), P. inconspicua causes lily leaf spot (Ingram and Levy 2019).


Biochemical importance of the genus, chemical diversity or applications

Pseudocercosporella produces the toxin cercosporin (Gunasinghe et al. 2016).




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Gunasinghe N, You M, Barbetti MJ. 2016 Phenotypic and phylogenetic studies associated with the crucifer white leaf spot pathogen, Pseudocercosporella capsellae, in Western Australia. Plant Pathology 65, 205–217.

Ingram RJ, Levy F. 2020 Identity and symptomatology of a newly described lily leaf spot disease (Pseudocercosporella inconspicua) of Gray’s lily (Lilium grayi). Canadian Journal of Plant Pathology 42, 499–507.

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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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