First Report of <i>Neoscytalidium dimidiatum</i> Causing Root Rot in Sweet Potato in Brazil

Mello, J. F. De; Brito, A. C. Q.; Motta, C. M. S.; Vieira, Janiele Cássia Barbosa; Michereff, Sami Jorge; Machado, Alexandre Reis

doi:10.1094/pdis-07-18-1242-pdn

Cited by 12 publications

(17 citation statements)

References 5 publications

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“…Neocytalidium dimidiatum has been reported to cause leaf blight in S. trifasiata in Malaysia (Kee et al 2017). In Brazil, N. dimidiatum has been reported to cause root rot in physic nut and cassava (Machado et al 2012;Mello et al 2018), black root rot in cassava (Machado et al 2014), dieback in grapevine and mango (Correia et al 2016;Marques et al 2013). Our study provides the first report of leaf blight on Sansevieria trifasciata in Brazil caused by Neoscytalidium dimidiatum.…”

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confidence: 60%

Neoscytalidium dimidiatum causes leaf blight on Sansevieria trifasciata in Brazil

Monteles

Sousa

Matos

et al. 2020

Australasian Plant Dis. Notes

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Sansevieria trifasciata plants showing symptoms of leaf blight were observed in Teresina City, Brazil. Based on morphology and the phylogenetic analysis of DNA sequences of the EF-1α and ITS regions, two isolates of Neoscytalidium dimidiatum were identified. Pathogenicity tests showed that the isolates caused leaf blight on S. trifasciata, in addition to Sansevieria cylindrica, and fulfilled Koch's postulates. To the best of our knowledge, this report is the first to describe N. dimidiatum on Sansevieria in Brazil.

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mentioning

confidence: 60%

Neoscytalidium dimidiatum causes leaf blight on Sansevieria trifasciata in Brazil

Monteles

Sousa

Matos

et al. 2020

Australasian Plant Dis. Notes

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“…Currently, fungi in the genus Neoscytalidium comprise four species, namely N. dimidiatum, N. hyalinum, N. novaehollandiae, and N. orchidacearum. N. dimidatum causes diseases in several plant species: canker of Ficus trees in Egypt [24]; root rot of sweet potato in Brazil [25]; shoot and needle blight of pines (Pinus spp.) in Turkey [26]; and shoot blight of citrus in Jordan [27].…”

Section: Discussionmentioning

confidence: 99%

Morphological, Molecular Identification and Pathogenicity of Neoscytalidium dimidiatum Causing Stem Canker of Hylocereus polyrhizus in Southern Thailand

Wonglom

Pornsuriya

et al. 2022

Plants

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Red-fleshed dragon fruit (Hylocereus polyrhizus) is commonly cultivated in Thailand, especially in southern Thailand, where the weather favors plant growth and development. In 2021, stem canker of H. polyrhizus was observed in a dragon fruit plantation field in Phatthalung Province, southern Thailand. Small, orange circular spots developed on the stem of H. polyrhizus, which later became gray, and the lesion expanded with a mass of conidia. Scytalidium-like fungus was isolated from infected tissues. Based on morphology and phylogenetic analyses of internal transcribed spacer (ITS), nuclear large subunit (LSU) and β-tubulin (tub) sequences of fungal isolates, the fungus was identified as Neoscytalidium dimidiatum. Pathogenicity tests revealed that this isolate caused stem canker on the stem of H. polyrhizus, similar to that observed in the field. Knowledge of the diagnosis of plant diseases is an important step for managing plant diseases and therefore, this finding provides basic information for the development of appropriate strategies to manage stem canker disease on H. polyrhizus plants.

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“…Thus, these results emphasize the importance of this plant pathogen in northeast Brazil. Recently, this species was reported for the first time causing root rot in sweet potato in Brazil (Mello et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…solani , causing necrotic lesions in the tuberous roots in storage (Da Silva and Clark, 2013). In Brazil, Neoscytalidium dimidiatum was reported as a causal agent of sweet potato root rot in Minas Gerais State (Mello et al, 2019). Because of the high occurrence of tuberous root and stem rot in sweet potato in Brazil and the lack of etiological studies using molecular techniques, the present study aimed to identify the Botryosphaeriaceae species associated with root and stem rot in sweet potato growing areas of Brazil, as well as testing the pathogenicity of the corresponding isolates.…”

Section: Introductionmentioning

confidence: 99%

Identification and pathogenicity of Botryosphaeriaceae species associated with root and stem rot of sweet potato in Brazil

et al. 2021

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The sweet potato (Ipomoea batatas) is characterized by the production of tuberous roots rich in starch and is one of the most produced and consumed vegetables in Brazil. Botryosphaeriaceae, among other fungi, are known to cause root and stem rot of sweet potato. However, no representative and accurate study has been performed for the correct identification of these fungal species in sweet potato in Brazil. Therefore, this study aimed to identify the Botryosphaeriaceae species associated with root and stem rot of sweet potato and confirm their pathogenicity. Tuberous roots and stems of sweet potato with rot symptoms were collected in production fields and markets and used for fungal isolations. The identification of fungi was based on the morphology of reproductive structures and phylogenetic analyses of the gene regions ITS, tef1‐α, and rpb2. The following species were identified: Lasiodiplodia theobromae, L. hormozganensis, Macrophomina phaseolina, M. euphorbiicola, M. pseudophaseolina, and Neoscytalidium dimidiatum. For the pathogenicity test, one representative isolate for each species was inoculated in healthy tuberous roots and in 30‐day‐old healthy seedlings. Black and necrotic lesions on tuberous roots and stems were observed in all replications and resulted in the death of some seedlings. This is the first report of L. hormozganensis, M. pseudophaseolina, and M. euphorbiicola, as causal agents of the stem and root rot of sweet potato and N. dimidiatum as a causal agent of stem rot worldwide.

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First Report of Neoscytalidium dimidiatum Causing Root Rot in Sweet Potato in Brazil

Cited by 12 publications

References 5 publications

Neoscytalidium dimidiatum causes leaf blight on Sansevieria trifasciata in Brazil

Neoscytalidium dimidiatum causes leaf blight on Sansevieria trifasciata in Brazil

Morphological, Molecular Identification and Pathogenicity of Neoscytalidium dimidiatum Causing Stem Canker of Hylocereus polyrhizus in Southern Thailand

Identification and pathogenicity of Botryosphaeriaceae species associated with root and stem rot of sweet potato in Brazil

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