Bipolaris yamadae causes foliage blight of Digitaria insularis in Brazil

Alves, Juliana Fonseca; Fabbris, Cláudia; Inokuti, Eliane Mayumi; da Nobrega, Thaísa Ferreira; Barreto, Robert Weingart; Vieira, Bruno Sérgio

doi:10.1007/s13314-023-00507-0

Australasian Plant Dis. Notes

2023

DOI: 10.1007/s13314-023-00507-0

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Bipolaris yamadae causes foliage blight of Digitaria insularis in Brazil

Juliana Fonseca Alves,

Cláudia Fabbris,

Eliane Mayumi Inokuti

et al.

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2024

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Bipolaris yamadae as a causal agent of brown leaf spot in Megathyrsus maximus in Brazil

Sanches,

Fernandes,

Batista

et al. 2024

Pesqui. Agropecu. Trop.

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Guinea grass (Megathyrsus maximus) is widely used as a forage crop in Brazil, but its production faces disease threats. Recently, new symptoms, such as oblong to irregular brown lesions on leaves, have emerged in M. maximus across the country. Particularly severe symptoms were observed in the BRS Tamani cultivar, and some other genotypes showed lesion coalescence and intense leaf necrosis. This study aimed to identify the cause of these symptoms. A fungus was isolated from the lesions and, using morphological measurements and molecular analysis of the ITS, GPDH and TEF-1α genes, it was identified as Bipolaris yamadae. Pathogenicity tests confirmed its ability to cause disease in M. maximus cv. Tamani. A field survey of 205 M maximus genotypes showed severe symptoms in 8.35 % of the materials.

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Bipolaris yamadae as a causal agent of brown leaf spot in Megathyrsus maximus in Brazil

Sanches,

Fernandes,

Batista

et al. 2024

Pesqui. Agropecu. Trop.

View full text Add to dashboard Cite

show abstract

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Bipolaris yamadae causes foliage blight of Digitaria insularis in Brazil

Cited by 1 publication

References 12 publications

Bipolaris yamadae as a causal agent of brown leaf spot in Megathyrsus maximus in Brazil

Bipolaris yamadae as a causal agent of brown leaf spot in Megathyrsus maximus in Brazil

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