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Pseudocercospora catappae on Terminalia tomentosa: 1. Stroma with attached conidiophores. 2-4. Conidiophores. 5-10. Conidia. Bar = 10 µm.
Source publication
doi 10.5943/cream/3/1/2 The Lao People's Democratic Republic (Lao PDR) or Laos is a landlocked country. During a study of cercosporoid fungi in Laos, 113 species were identified including 108 species of true cercosporoid fungi; Cercospora (41 species), Passalora (10), Pseudocercospora (49), and Zasmidium (8). Five species of morphological similar f...
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Citations
... Leaf spots first appearing as individual, circular or angular, grayish brown to brown centre, with reddish purple borders was caused by Cercospora species similar to symptoms manifested on Duranta repens. Cercospora leaf spots of Duranta repens is caused by Cercospora duranticola, first described as new species different from Cercospora apii in Laos (Phengsintham et al., 2013). Based on symptoms and conidia structure, leaf spot diseases on Cestrum fasciculatum was also found to be caused by Cercospora sp., and Alternaria sp. ...
Fungal pathogens are most common plant pathogen of ornamental plants, reducing their aesthetic and ornamental value. Thus, the study was conducted for the diagnosis of diseases and to maintain the aesthetic value of the ornamental plants in the college campus. The fungal diseases in the campus were studied through symptomatic and microscopic studies, using micrometry for conidial size measurement. A total of 15 fungal pathogens were observed causing 4 different types of diseases on 13 ornamental plant species. Fungal leaf spot caused by Alternaria sp., Cercospora sp., Cladosporium magnoliigena, Diplocarpon rosae, Pestalotiopsis sp., Phyllosticta sp. and Didymella curtisii were observed on 8 host species followed by powdery mildew caused by Erysiphe communis, Golovinomyces cichoracearum, Oidium jasmini, Podosphaera pannosa on 5 host. Black sooty mold (Capnodium sp.) and rust (Puccinia pelargonii-zonalis) were observed on corresponding plant host. This report acquaints ornamental growers and others with general symptoms of ornamental plant diseases and possible fungal pathogens commonly observed in the campus.
... Otros patógenos fúngicos de la uchuva son Pythium sp., Cercospora physalidis y Sclerotinia sclerotiorum (Lib.) (Zapata et al., 2002(Zapata et al., y 2005Phengsintham et al., 2013). Por otro lado, el fruto de Physalis también puede ser afectado por patógenos de postcosecha, tales como Botrytis sp., Cladosporium, Pestalotia y Phomopsis (Heredia et al., 2017;Singh et al., 2019), que se manifiestan en frutos cosechados en condiciones de altas humedad relativa y temperaturas (Raghava & Murty, 1987;Zapata et al., 2005). ...
El objetivo de esta revisión es destacar y poner en prospectiva el potencial y la factibilidad que tiene el cultivo de especies nativas de las Yungas subandinas, Physalis peruvianay P. pubescens,en Argentina.Ambas producen frutos de similares características entre sí, siendo casi indistinguibles. Algunas denominaciones del fruto son Physalis, uchuva, capulí, aguaymanto, Cape goosberry o goldenberry. Es una fruta exótica de creciente interés mundial, fundamentalmente por sus propiedades nutracéuticas y excelentes precios en Europa y EE.UU., donde se considera fruta “speciality”. Crece en ambientes con rangos térmicos de 5 a 35°C, con temperatura base de 6,29°C y óptima de 21°C. Necesita suministro de agua constante, con demanda en el rango de 1000 a 1800 mm de precipitación bien distribuidos durante el año. Las principales plagas son Epitrix cucumeris (Coleoptera), Chloridea (Heliothis) subflexa (Lepidoptera) y Liriomyza sp. (Diptera). El patógeno más importante es Fusarium oxysporum, le siguen Phoma sp., Pythium sp., Cercospora physalidis y Sclerotinia sclerotiorum. El fruto puede ser afectado por patógenos de postcosecha como Botrytis sp., Cladosporium, Pestalotia y Phomopsis. En Tucumán, INTA Famaillá realizó pruebas de adaptación con ambas especies de Physalis, verificándose su viablidad agronómica. El NOA se ha desarrollado como polo agroexportador de berries frescos hacia el hemisferio norte, donde también se encuentran los principales mercados consumidores de uchuva, constituyendo una oportunidad. La transformación de la uchuva permite la elaboración de productos estables sensorialmente agradables, que amplían las posibilidades de comercialización y permiten el agregado de valor (pulpa, néctares, jugos, mermeladas, deshidratados, barras energéticas, salsas, helados, etc.).
... Cercospora nicotianae (Ellis & Everhart) is a fungal pathogen that causes frogeye leaf spot of tobacco (Nicotianae tabacum). This pathogen is present in most tobacco-growing regions around the world including the Americas, India, Southeast Asia, and Africa (Alasoadura and Fajola 1970;Kulkarni et al. 2005;Otiniano et al. 2007;Phengsintham et al. 2013;Shew and Lucas 1991). Frogeye leaf spots in flue-cured tobacco are characterized by medium to dark brown margins and white centers. ...
Frogeye leaf spot of tobacco caused by Cercospora nicotianae (Ellis & Everhart) is a widespread disease of cultivated tobacco. Recently, flue-cured tobacco producers in North Carolina reported losses due to frogeye leaf spot disease despite the use of strobilurin fungicides. Isolates (n = 4) were obtained in 2018 from affected tobacco leaves from Cumberland, Lenoir, and Nash counties. In 2019, isolates (n = 28) were collected from a field in Wilson county. After sequencing the cytb region of 32 isolates, 30 contained a single point mutation conferring a G143A or F129L amino acid change that resulted in quinone outside inhibitor (QoI) fungicide resistance. Although these resistance mutations have been found in air-cured tobacco in Kentucky, to the best of our knowledge, the present study is the first to report QoI resistance mutations in C. nicotianae populations in flue-cured tobacco and a first report in North Carolina.
... Castañeda & U. Braun], is commonly found in many areas where the cassava (Manihot esculenta Crantz.) is cultivated. The symptom of this phytopathogen is characterized by having circular lesions, sometimes angular and limited by leaf veins, ± 15 mm diam., brown on upper surface and grey on lower surface with distinct border (Phengsintham et al. 2013). Significant yield loss of cassava tuber is possibly related to the reduction of photosynthesis capacity of the plant due to the leaf spots. ...
Leaf spot is a common disease of cassava in Indonesia and other tropical countries. The present study aims to determine two isolates isolated from leaf spot of cassava in Indonesia using a molecular phylogenetic analysis based on internal transcribed spacer (ITS) rDNA sequence and morphological examination. The results showed that the two isolates belong to Clarohilum henningsii. This study revealed the phylogenetic position of C. henningsii from Indonesia, where in the previous studies, it has been reported as Cercospora cassavae, C. manihotis, C. henningsii, or Passalora henningsii based on morphological examinations.
... All described species of the genus Ramularia are host specific and do not exceed the limits of host families and even particular genera (Braun 1995 (Ramakrishnan & Sundaram 1953, Chaudhary et al. 2002, Crous & Braun 2003, Kamal 2010, Phengsintham et al. 2013. Above these species differ from Ramularia titarpaniensis due to coloured nature of conidia or conidiophores, or both. ...
Ramularia titarpaniensis, a new hyaline anamorphic foliicolous hyphomycetous fungus, discovered on living leaves of Wendlandia sp. (Rubiaceae) is described and illustrated. This species is compared with closely related species of cercosporoid hyphomycetous forms reported on the same family.
... Additionally, numerous stud-ies dealing with cercosporoid fungi found in different countries have been published, e.g. Brazil (Viégas 1945), Japan (Katsuki 1965), Singapore and the Malay Peninsula (Yen & Lim 1980), Taiwan (Hsieh & Goh 1990), China (Guo & Hsieh 1995, Guo et al. 2003, 2005, South Africa (Crous & Braun 1996), Russia and adjacent countries (Braun & Mel'nik 1997), Korea (Shin & Kim 2001), Laos (Phengsintham et al. 2013a) and Thailand (Phengsintham et al. 2013b). Unfortunately, all of these regional studies of cercosporoids were only based on morphological, ecological and host specificity data for species delimitation, and in many instances, this has proven inadequate (Halleen et al. 2004, Lee et al. 2004, Réblová et al. 2004, Verkley et al. 2004a, b, Crous et al. 2006a, b, 2007a, b, 2009a, b, Arzanlou et al. 2007, Phillips et al. 2008, Shivas et al. 2009). ...
The fern flora of the world (Pteridophyta) has direct evolutionary links with the earliest vascular plants that appeared in the late Devonian. Knowing the mycobiota associated to this group of plants is critical for a full understanding of the Fungi. Nevertheless, perhaps because of the minor economic significance of ferns, this niche remains relatively neglected by mycologists. Cercosporoid fungi represent a large assemblage of fungi belonging to the Mycosphaerellaceae and Teratosphaeriaceae (Ascomycota) having cercospora-like asexual morphs. They are well-known pathogens of many important crops, occurring on a wide host range. Here, the results of a taxonomic study of cercosporoid fungi collected on ferns in Brazil are presented. Specimens were obtained from most Brazilian regions and collected over a 7-yr period (2009–2015). Forty-three isolates of cercosporoid and mycosphaerella-like species, collected from 18 host species, representing 201 localities, were studied. This resulted in a total of 21 frond-spotting taxa, which were identified based on morphology, ecology and sequence data of five genomic loci (actin, calmodulin, ITS, LSU and partial translation elongation factor 1-α). One novel genus (Clypeosphaerella) and 15 novel species (Cercospora samambaiae, Clypeosphaerella sticheri, Neoceratosperma alsophilae, N. cyatheae, Paramycosphaerella blechni, Pa. cyatheae, Pa. dicranopteridis-flexuosae, Pa. sticheri, Phaeophleospora pteridivora, Pseudocercospora brackenicola, Ps. paranaensis, Ps. serpocaulonicola, Ps. trichogena, Xenomycosphaerella diplazii and Zasmidium cyatheae) are introduced. Furthermore, 11 new combinations (Clypeosphaerella quasiparkii, Neoceratosperma yunnanensis, Paramycosphaerella aerohyalinosporum, Pa. dicranopteridis, Pa. gleicheniae, Pa. irregularis, Pa. madeirensis, Pa. nabiacense, Pa. parkii, Pa. pseudomarksii and Pa. vietnamensis) are proposed. Finally, nine new host associations are recorded for the following known fungal species: Cercospora coniogrammes, Cercospora sp. Q, Ps. abacopteridicola, Ps. lygodiicola and Ps. thelypteridis.
... Ellis" on Lygodium flexuosum from Myanmar (Thaung 2008) seems to belong to P. lygodii. Additional records of P. lygodii are known from the Philippines (Begum et al. 2009) and Taiwan (Kirschner & Chen 2010), in both cases on Lygodium japonicum, and from Laos on L. polystachyum (Phengsintham et al. 2013). Periconiella lygodii is characterized by similar smooth scolecosporous conidia, but forms distinct leaf spots, much shorter conidiophores that are enlarged at the base, and conidia that are rounded at the apex (Braun 2004). ...
The new species Periconiella liquidambaricola, collected on living leaves of Liquidambar formosana (Altingiaceae) in Jiangxi Province, China, is described, illustrated and compared with other species of the genus Periconiella. The new fungus is the first
species described from a host belonging to the Altingiaceae. Periconiella liquidambaricola is well characterized by its very long conidiophores and smooth, pale scolecosporous conidia. It has similar conidia to Periconiella lygodii on fronds of Lygodium flexuosum
in India, but differs in having conidia with attenuated to acute apexes and much longer conidiophores with uninflated bases.
... Notes: Phengsintham et al. (2013) identified the type collection of this species as Passalora fusimaculans, including Cercospora agrostidis as a synonym, which is now treated as separate species. Passalora agrostidicola is distinguished from C. agrostidis by its circular to irregular leaf spots, larger stromata, 0-1-septate conidiophores, and shorter and narrower, olivaceous, partly verruculose, cylindrical to subcylindrical conidia. ...
The third part of a series of monographic treatments of cercosporoid fungi (formerly Cercospora
s. lat., Mycosphaerellaceae, Ascomycota) continues with a treatment of taxa on monocots (Liliopsida; Equisetopsida, Magnoliidae, Lilianae), covering asexual and holomorph species with mycosphaerella-like sexual morphs on true grasses (Poaceae), which were excluded from the second part. The species concerned are keyed out, alphabetically listed, described, illustrated and supplemented by references to previously published descriptions, illustrations, and exsiccatae. A key to the recognised genera and a discussion of taxonomically relevant characters was published in the first part of this series. Several species are lecto- or neotypified. The following taxonomic novelties are introduced: Cercospora barretoana comb. nov., C. cymbopogonicola nom. nov., Cladosporium elymi comb. nov., Passalora agrostidicola sp. nov., P. brachyelytri comb. nov., and P. dichanthii-annulati comb. nov.
... Additionally, numerous stud-ies dealing with cercosporoid fungi found in different countries have been published, e.g. Brazil (Viégas 1945), Japan (Katsuki 1965), Singapore and the Malay Peninsula (Yen & Lim 1980), Taiwan (Hsieh & Goh 1990), China (Guo & Hsieh 1995, Guo et al. 2003, 2005, South Africa (Crous & Braun 1996), Russia and adjacent countries (Braun & Mel'nik 1997), Korea (Shin & Kim 2001), Laos (Phengsintham et al. 2013a) and Thailand (Phengsintham et al. 2013b). Unfortunately, all of these regional studies of cercosporoids were only based on morphological, ecological and host specificity data for species delimitation, and in many instances, this has proven inadequate (Halleen et al. 2004, Lee et al. 2004, Réblová et al. 2004, Verkley et al. 2004a, b, Crous et al. 2006a, b, 2007a, b, 2009a, b, Arzanlou et al. 2007, Phillips et al. 2008, Shivas et al. 2009). ...
... detected. Based on the characteristic disease symptomatology and morphology of the fungus, the causal organism was identified as Pseudocercospora jahnii (Crous and Braun 2003), which was also recently reported from Thailand (Phengsintham et al. 2013). ...
Young and mature leaves with necrotic spots of Tabebuia pallida were collected in field experimental plots in Mandaue City, Cebu, and Laguna in the Philippines. The leaf spots were colonised by a cercosporoid fungus identified as Pseudocercospora jahnii, which is a first report of this pathogen from the Philippines.
