First report of Neoscytalidium dimidiatum inducing canker disease on apple trees in China

Sha, Shuaishuai; Wang, Zhe; Hao, Haiting; Wang, Lan; Feng, Hongzu

doi:10.1007/s42161-022-01131-0

Cited by 4 publications

(4 citation statements)

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“…Symptoms associated with N . dimidiatum on apple trees encompass branch dieback, branch canker, and gummosis in India (Sutton & Dyko, 1989), Iraq (Sutton & Dyko, 1989), Iran (Nourian et al., 2021), Türkiye (Ören et al., 2022), and China (Sha et al., 2022). Although recently identified on various plant hosts in Turkish field conditions, this species had not been previously associated with commercially available fresh fruits.…”

Section: Discussionmentioning

confidence: 99%

Neoscytalidium dimidiatum: A newly identified postharvest pathogen of pears and its implications for pome fruits

Derviş,

Zholdoshbekova,

Güney

et al. 2024

Journal of Phytopathology

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Türkiye is a prominent contributor to pear and diverse pome fruit production. Pear fruit with unusual brown to black spots and rot symptoms observed in public marketplaces in Mardin province have raised concerns regarding postharvest fruit health. The consistent isolation of a fungus from these fruits revealed morphological features indicative of Neoscytalidium dimidiatum. Phylogenetic confirmation of its identity ensued through BLASTn searches targeting, the internal transcribed spacer (ITS) of ribosomal DNA, the partial translation elongation factor 1‐alpha gene (tef1), and the partial β‐tubulin gene (tub2). Pathogenicity evaluations were conducted on common pome fruits, namely pears, apples, and quinces, unveiling the susceptibility of all examined fruits to postharvest infection by this emergent pathogen. Furthermore, an investigation was carried out to discern the pathogen's response to varying temperature ranges on pear fruits, revealing that the most pronounced lesions occurred at 30°C, followed by 25°C, 35°C, and 20°C. Conversely, no lesion development was observed at 10°C, 15°C, or 40°C. To the best of our knowledge, this study represents the first report of N. dimidiatum as the etiological agent responsible for postharvest rot in pear fruit. The implications of these findings highlight the potential threat posed by this pathogen to pome fruits postharvest, especially in regions where cold storage facilities are not widely utilized, warranting increased vigilance and preventive measures.

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Section: Discussionmentioning

confidence: 99%

Neoscytalidium dimidiatum: A newly identified postharvest pathogen of pears and its implications for pome fruits

Derviş,

Zholdoshbekova,

Güney

et al. 2024

Journal of Phytopathology

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“…Affected trees exhibited symptoms of dark black lesions on the outer bark, branch dieback, vascular discoloration, stem canker and tree death. Similarly, during a survey conducted in 2020 in apple orchards in Aral, Xinjiang China, 17% of the trees showed bark necrosis, branch dieback, vascular bundle browning and tree death due to N. dimidiatum infection (Sha et al., 2022 ).…”

Section: Pest Categorisationmentioning

confidence: 96%

“…(Güney et al., 2021 ), Malus spp. (Ören et al., 2021 ; Sha et al., 2022 ), Mangifera indica (Ray et al., 2010 ; Sakalidis et al., 2011 ; Ismail et al., 2013 ; Coutinho et al., 2018 ), Melissa officinalis (Özer et al., 2022), Morus spp. (Oksal, 2022 ), Olea europaea (Güney et al., 2022b ), Origanum onites (Alkan et al., 2022 ), Pinus spp.…”

Section: Pest Categorisationmentioning

confidence: 99%

“…(Suwannarach et al, 2018;Chang et al, 2020), Citrus spp. (Polizzi et al, 2009;Adesemoye et al, 2014;Al-Sadi et al, 2014;Mayorquin et al, 2016;Alananbeh et al, 2020;Espargham et al, 2020), Cucumis melo (Mirtalebi et al, 2019), Diospyros kaki ( € Oren et al, 2020a), Ficus benjamina (Al-Bedak et al, 2018), F. carica (Ray et al, 2010;Xu et al, 2015;Gusella et al, 2021;G € uney et al, 2022a), Ipomoea batatas (de Mello et al, 2019Mello et al, , 2021, Juglans regia (Chen et al, 2013;Dervis ß et al, 2019b) Oren et al, 2021;Sha et al, 2022), Mangifera indica (Ray et al, 2010;Sakalidis et al, 2011;Ismail et al, 2013;Coutinho et al, 2018), Melissa officinalis ( € Ozer et al, 2022), Morus spp. (Oksal, 2022) (Hashemi and Mohammadi, 2016), Prunus spp.…”

Section: Biology Of the Pestmentioning

confidence: 99%

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Pest categorisation of Neoscytalidium dimidiatum

Bragard¹,

Baptista²,

Chatzivassiliou³

et al. 2023

EFS2

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The EFSA Plant Health Panel performed a pest categorisation of Neoscytalidium dimidiatum, a clearly defined plant pathogenic fungus of the family Botryosphaeriaceae. The pathogen affects a wide range of woody perennial crops and ornamental plants causing symptoms such as leaf spot, shoot blight, branch dieback, canker, pre-and post-harvest fruit rot, gummosis and root rot. The pathogen is present in Africa, Asia, North and South America, and Oceania. It has also been reported from Greece, Cyprus and Italy, with a restricted distribution. Nevertheless, there is a key uncertainty on the geographical distribution of N. dimidiatum worldwide and in the EU, because in the past, when molecular tools were not available, the two synanamorphs of the pathogen (Fusicoccum-like and Scytalidium-like) might have been misidentified based only on morphology and pathogenicity tests. N. dimidiatum is not included in Commission Implementing Regulation (EU) 2019/2072. Because of the wide host range of the pathogen, this pest categorisation focuses on those hosts for which there is robust evidence that the pathogen was formally identified by a combination of morphology, pathogenicity and multilocus sequence analysis. Plants for planting, fresh fruits and bark and wood of host plants as well as soil and other plant growing media are the main pathways for the further entry of the pathogen into the EU. Host availability and climate suitability factors occurring in parts of the EU are favourable for the further establishment of the pathogen. In the areas of its present distribution, including Italy, the pathogen has a direct impact on cultivated hosts. Phytosanitary measures are available to prevent the further introduction and spread of the pathogen into the EU. N. dimidiatum satisfies the criteria that are within the remit of EFSA to assess for this species to be regarded as potential Union quarantine pest.

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Identification of Fungal Species Associated with Apple Canker in Tarim Basin, China

et al. 2023

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Apple canker has decreased yields of the economically important apple (Malus domestica Borch) crop in China in recent years. Pathogen identity is highly challenging and the disease is poorly understood. Specimens of 339 fungi were isolated from apple trees in the primary apple-producing region in the Tarim Basin during the current study. A total of 9 species of Cytospora and 5 species of Botryosphaeriaceae were identified by morphological observation and multi-locus phylogenetic analyses (ITS, ACT, TEF, and TUB for Cytospora; ITS, TEF, and TUB for Botryosphaeriaceae). Cytospora pyri from the Cytospora genus was the dominant species causing apple canker in the Tarim Basin. Cytospora melnikii, Cytospora tritici, Cytospora euonymina, Diplodia seriata, and Botryosphaeria dothidea have been described as the cause of apple canker in China. Apple (Red Fuji) branches were utilized to assess the pathogenicity of 24 representative fungal isolates from the 14 species and branches from seven distinct woody plants, Korla pear, walnut, Chinese date, Xinjiang poplar, sand jujube, Populus euphratica, and willow, were utilized to analyze the host range. The main pathogenic fungal species of apple canker around the Tarim Basin were identified and biological characteristics explored. Pathogen diversity and regional source diversity were assessed with host range and pathogenicity. The aim was to provide a theoretical foundation for the prevention and treatment of apple canker.

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First report of Neoscytalidium dimidiatum inducing canker disease on apple trees in China

Cited by 4 publications

References 2 publications

Neoscytalidium dimidiatum: A newly identified postharvest pathogen of pears and its implications for pome fruits

Neoscytalidium dimidiatum: A newly identified postharvest pathogen of pears and its implications for pome fruits

Pest categorisation of Neoscytalidium dimidiatum

Identification of Fungal Species Associated with Apple Canker in Tarim Basin, China

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