Microdochium oryzae Associated with Rice Leaf Scald Disease in Paraguay

doi:10.22587/ajbas.2018.12.7.8

Cited by 1 publication

(2 citation statements)

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“…Microdochium seminicola was detected in association with rice sheath rot disease in the Fogera District, Ethiopia. Although studies have indicated that M. seminicola is one of the most common species causing leaf scald disease in rice (Gutierrez et al., 2008; Quintana et al., 2018) in Argentina and Paraguay as well as in wheat (Gagkaeva et al., 2020) in Russia, it was less predominant compared to Phoma and Epicoccum species in our study. Other species of the genus Microdochium ( M. nivale and M. majus ) have been reported to cause seedling blight disease in spring cereals such as barley, wheat and oats (Jonaviciene et al., 2016).…”

Section: Discussioncontrasting

confidence: 71%

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Genetic diversity and pathogenicity of fungi associated with rice sheath rot in the Fogera plain, Northwest Ethiopia

Gizaw,

Zegeye,

Hika

et al. 2023

Journal of Phytopathology

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Sheath rot is a widespread rice disease that affects rice crops worldwide. It is particularly prevalent in Ethiopia, with the Fogera plains exhibiting the highest incidence and severity. However, the lack of reliable molecular‐level identification of rice fungal pathogens in Ethiopia has hindered the development of effective management practices. This study aimed to assess the diversity of fungal agents causing sheath rot disease in rice crops around the Fogera plains, Ethiopia, using both morphology and nucleotide sequences of the ITS1 rDNA region. Additionally, the pathogenicity of the isolates was evaluated using attached tiller assay methods. A total of 16 fungal isolates were recovered from diseased plant samples. Among these, five species; Phoma spp., Phoma herbarium, Epicoccum sorghinum, Epicoccum lantuscollum and Microdochium seminicola were identified and reported as new records of sheath rot disease in rice. The predominant genus was Phoma (75%) followed by Epicoccum (18.75%). The pathogenicity caused by E. sorghinum was particularly severe and significantly different from the symptoms caused by other isolates, resulting in a mean lesion length of 167.7 mm and a disease severity of 55.7%. These findings suggest that E. sorghinum is the most important rice pathogen in the region. Our results have identified the most predominant and pathogenic fungal species associated with sheath rot disease in the region. Importantly, this study marks the first report of sheath rot‐causing fungi identified in rice using the ITS rDNA‐sequencing technique in Ethiopia. Therefore, this research may contribute to the development of fungal disease management strategies in rice and provide evidence to initiate a rice breeding program focused on developing sheath‐rot‐resistant rice varieties.

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Section: Discussioncontrasting

confidence: 71%

“…species causing leaf scald disease in rice (Gutierrez et al, 2008;Quintana et al, 2018) in Argentina and Paraguay as well as in wheat (Gagkaeva et al, 2020) in Russia, it was less predominant compared to Phoma and Epicoccum species in our study. Other species of the genus Microdochium (M. nivale and M. majus) have been reported…”

Section: Discussioncontrasting

confidence: 51%