Sweet orange scab with a new scab disease "syndrome" of citrus in the USA associated with Elsinoë australis

Kunta, Madhurababu; Rascoe, J.; Sa, P. B. de; Timmer, L. W.; Palm, Mary E.; Graça, J. V. da; Mangan, Robert L.; Malik, Nasir S. A.; Salas, Bacilio; Satpute, Aditi; Sétamou, Mamoudou; Skaria, M.

doi:10.1590/s1982-56762013005000003

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…Pathogenicity analysis based on mature leaves with intact cuticles also showed that S. matsudana is resistant to E. murrayae . Due to the fact that the pathogenicity of E. australis and E. fawcettii was often tested with young leaves (Hyun et al., ; Kunta et al., ), the young leaves of willows were also used to test the pathogenicity of E. murrayae . Interestingly, the necrosis lesions were successfully produced on young leaves of S. matsudana , indicating that the resistance mechanism of S. matsudana is developmental stage dependent.…”

Section: Discussionmentioning

confidence: 99%

Molecular identification and characterization of Elsinoë murrayae (Synonym: Sphaceloma murrayae) from weeping willow

Zhao

Zhang

Xiao

et al. 2017

Journal of Phytopathology

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Sphaceloma murrayae is a significant fungal pathogen of Salix spp. It causes greyish‐white leaf spots, which were reported worldwide except in China. Its morphological characteristics were described in the early literature; however, there is a lack of molecular information pertaining to this fungus. This study identified and characterized three fungal isolates that obtained from weeping willow leaf spots in China. Based on disease symptoms, morphological characteristics and single nomenclature rules for fungi, these isolates are proposed to be new combinations of Elsinoë murrayae (Synonym: S. murrayae). Phylogenetic analysis that combined internal transcribed spacer (ITS), large subunit (LSU), RBP2 and TEF1‐α DNA sequences indicated that E. murrayae isolates and Elsinoë salicina—another Elsinoë sp. isolated from Salix sp.—were distinguishable species. With trypan blue staining and stereomicroscopic observation, we found that large‐scale cell death occurred at 2 days postinoculation (dpi) and slight disease symptoms started at 3 dpi when the conidia were inoculated on Salix babylonica leaves. Pathogenicity analysis revealed that three isolates can successfully infect mature leaves of S. babylonica, Salix fragilis and Salix suchowensis, but not Salix matsudana. In addition, a necrosis‐ and ethylene‐inducing‐like proteins’ (NLP) gene, named EmNLP1, was cloned. The cytotoxicity of EmNLP1 was confirmed by transient assay in tobacco. During infection, EmNLP1 dramatically peaked at 2 dpi and maintained a high‐level expression in the necrosis lesion growing stage.

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Section: Discussionmentioning

confidence: 99%

Molecular identification and characterization of Elsinoë murrayae (Synonym: Sphaceloma murrayae) from weeping willow

Zhao

Zhang

Xiao

et al. 2017

Journal of Phytopathology

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“…Penyakit ini awalnya terjadi di negara Amerika Selatan termasuk Argentina, Bolivia, Brasil, Equador, Paraguai, dan Uruguai (Chung, 2011). Serangan penyakit kudis buah jeruk banyak terjadi pada daerah beriklim lembab (Kunta et al, 2013). Gejala serangan terjadi pada jaringan muda seperti daun, tunas dan buah dari jenis jeruk yang rentan (Nelson, 2008).…”

Section: Pendahuluanunclassified

Mutu Buah Jeruk Kalamansi Pada Berbagai Tingkat Serangan Penyakit Kudis

Dinata¹,

Hidayat

2019

JIPI

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[FRUIT QUALITIES OF CALAMANSI UNDER DIFFERENT SCAB DISEASE SEVERITIES]. Citrus scab caused by Elsinoë fawcettii dan Elsinoë australis fungi is an important disease for calamansi lime. The pathogen can result creamy-yellowish, raised, rounded, corky scabs appear on the rind surface of the fruit that reduces marketabilityof the fruit. The objective of this study was to evaluate the development and intensity of scab and their effects on the physical and chemical qualities of calamansi fruits. The observations were made on 30 fruit samples collected from farmer's calamansi orchard for the development and intensity of disease symptoms, fruit appearances, juice content, and total soluble solids of the juice. The results showed that the pathogen began to attack on early fruit set phase. The intensity of the disease at the beginning of the observation was 11.06% and increased to 58.18% with an average rate of attack intensity of 14.54%. The disease reduced the fruit weight, fruit diameter, juice volume and total soluble solid levels.

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“…Sweet orange scab (SOS disease): Sweet orange scab is caused by the fungus Elsinoë australis. 47,48 Sweet orange scab occurs on sweet oranges, limes, lemons, mandarins, satsumas, kumquat, grapefruit, tangerines and tangerine hybrids. The disease is common in South America, mainly Brazil, 49 Argentina and Paraguay.…”

Section: Fungal Diseases Of Citrus Sinensismentioning

confidence: 99%

Isolation and identification of fungi associated with the spoilage of sweet orange (Citrus sinensis L) and banana (Musa sapientum L) in Sokoto Metropolis

AS¹,

Iu²,

Ameh³

et al. 2018

JABB

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Mycological studies on fungi in apparently diseased sweet orange (Citrus sinensis) and banana (Musa sapientum) sampled from various points in Kara Market in Sokoto Metropolis was carried out between August and September, 2016. The samples were surfaced sterilized with ethanol and the homogenates were cultured on Potato Dextrose Agar and incubated aerobically at room temperature for 7days at 30°C. the pure cultures obtained were identified morphologically and microscopically. The investigation revealed that the samples were infected with several fungal species. The most predominant fungi isolated from sweet orange was Cladosporium spp (40%), Fusarium spp (30%), Alternaria spp (20%) and Chrysonilia spp (10%) while the most predominant fungi isolated from banana was Fusarium spp (50%), Mucor spp (30%) and Rhizopus spp (20%). The pathogenicity test result shows that Cladosporium spp and Fusarium spp were the most active in sweet orange with rot length of 74mm and 70mm respectively and the least active fungi were Alternaria spp and Chrsonilia spp with rots length of 52mm and 48mm respectively while Fusarium spp and Mucor spp were the most active in banana with rots length of 84mm and 75mm respectively and the least active fungus is Rhizopus spp with rots length of 54mm.

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Sweet orange scab with a new scab disease "syndrome" of citrus in the USA associated with Elsinoë australis

Cited by 10 publications

References 9 publications

Molecular identification and characterization of Elsinoë murrayae (Synonym: Sphaceloma murrayae) from weeping willow

Molecular identification and characterization of Elsinoë murrayae (Synonym: Sphaceloma murrayae) from weeping willow

Mutu Buah Jeruk Kalamansi Pada Berbagai Tingkat Serangan Penyakit Kudis

Isolation and identification of fungi associated with the spoilage of sweet orange (Citrus sinensis L) and banana (Musa sapientum L) in Sokoto Metropolis

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