Detection and transmission of Drechslera avenae from oat seed

Carmona, Marcelo; Zweegman, Juan; Reis, Erlei Melo

doi:10.1590/s0100-41582004000300015

Cited by 11 publications

(9 citation statements)

References 4 publications

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“…In this study, we established a maximum rate of seed transmission efficacy of 18.8% under field conditions. Both similar and higher rates of seed transmission have been reported for other leaf spots of cereals such as Drechslera avenae (Carmona et al 1999;Carmona et al 2004) and D. tritici-repentis (Carmona et al 2006;Schilder and Bergstrom 1992). Several factors are known to influence seed to crop infection, such as the number of infected seeds brought into the soil, the seeding rate, and the edaphic and climatic conditions.…”

Section: Discussionsupporting

confidence: 68%

Epidemiology and control of seed-borneDrechslera tereson barley

Carmona¹,

Barreto²,

Moschini³

et al. 2008

Cereal Research Communications

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Net blotch caused by Drechslera teres is an important disease in most barley-growing areas. To prevent the introduction of this pathogen into the field, seed treatment is recommended. The objectives of this research were to evaluate different fungicides for eradicating D. teres from the seed and the role of both infected and treated seeds in the epidemiology of the disease under field conditions. The three fungicides tested in vitro (iminoctadine, guazatine, and thiram + iprodione) were able to eliminate D. teres at the highest dose used in this study. Under field conditions, eradication of the pathogen was not achieved, but net blotch was significantly reduced.

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Section: Discussionsupporting

confidence: 68%

Epidemiology and control of seed-borneDrechslera tereson barley

Carmona¹,

Barreto²,

Moschini³

et al. 2008

Cereal Research Communications

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“…Em levantamento feito por Reis & Soares (1995) Incidência (%)* Municípios branca proveniente de diferentes municípios dos estados do Rio Grande do Sul, Paraná e Mato Grosso do Sul, a incidência de D. avenae variou de 4,25 a 70%. Em pesquisa desenvolvida na Argentina, a incidência de D. avenae em sementes de aveia branca variou de 0 a 52% de um total de 24 amostras avaliadas provenientes de diferentes localidades (Carmona et al, 2004). O presente trabalho mostra que o D. avenae está amplamente distribuído em sementes/grãos onde aveia é cultivada o que compromete sua qualidade na comercialização para fins industriais.…”

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Comparação da sensibilidade de métodos para a detecção de fungos patogênicos em sementes de aveia branca e preta no Rio Grande do Sul

Almeida¹,

Reis²

2009

Trop. plant pathol.

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RESUMOA cultura da aveia, representada pelas espécies Avena sativa L. e Avena strigosa Schreb, é uma das principais alternativas para o cultivo durante o inverno no Sul do Brasil. Os patógenos dessa cultura, como Drechslera avenae causador da helmintosporiose, sobrevivem em sementes e nos restos culturais. Em experimentos conduzidos em laboratório foram testados dois métodos de detecção, incubação em substrato de batata-dextrose-ágar (BDA) e em meio semi-seletivo de Reis, visando selecionar o mais sensível na detecção de D. avenae, Alternaria alternata e Bipolaris sorokiniana e quantificar a incidência destes fungos em sementes de aveia produzidas em diferentes municípios do Rio Grande do Sul. O método semi-seletivo de Reis mostrou-se mais sensível na detecção de D. avenae e A. alternata em aveia branca, para B. sorokiniana, o método com BDA foi o mais sensível em aveia branca, não diferindo do seletivo de Reis para aveia preta. A menor e maior incidência de D. avenae em sementes de aveia branca variaram de 12 a 76% e em aveia preta de 4 a 90% , para A. alternata variaram de 3 a 53% e 2 a 31% em aveia branca e preta respectivamente e B. sorokiniana em aveia branca de 0 a 16% e 0 a 3% em preta. Palavras-chave: Drechslera avenae, Alternaria alternata, Bipolaris sorokiniana helmintosporiose, patologia de sementes. ABSTRACT Sensitivity of methods for detection of pathogenic fungi in white and black oat seeds in Rio Grande do Sul stateThe oat crop, represented by the species Avena sativa and Avena strigosa, is one of the most important alternatives for agriculture during winter in Southern Brazil. Oat pathogens such as Drechslera avenae, the causal agent of helminthosporiosis, survive in seeds and in crop residues. In experiments conducted in the laboratory two media substrates were tested, potato-dextrose-agar and Reis semi-selective, aiming to select the most sensitive in the detection of D. avenae. Two other fungi in seeds were also evaluated, Alternaria alternata and Bipolaris sorokiniana. Another objective of this work was to quantify the incidence of fungi in oat seeds produced in some counties of Rio Grande do Sul state. A total of 38 samples had been plated in gerboxes containing the culture medium and incubated in a climatized chamber. The semi-selective medium was more sensitive in the detection of D. avenae and of A. alternata in white and black oats; on the other hand, for B. sorokiniana, the PDA media was more sensitive in white oats, while for black oats there was no statistical difference. In the quantification of fungi in white and black oat seeds in the various counties, the lowest and highest incidence of D. avenae in white oat seeds varied from 12 to 76% and in black oats from 4 to 90%; for A. alternata it varied from 3 to 53% in white oats and 2 to 31% in black oats; for B. sorokiniana it varied from 0 to 16% in white oats and 0 to 3% in black oats. Keywords: Drechslera avenae, Alternaria alternata, Bipolaris sorokiniana helminthosporiosis, seed pathology.A aveia é uma das principais culturas util...

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“…La importancia de este hongo radica en que es uno de los principales patógenos trasmitidos a través de semillas de avena, además de ser el agente causal de tizón foliar de la avena (Làngaro et al, 2001;Carmona et al, 2004;Almeida y Reis, 2009). …”

unclassified

“…This is one of the main pathogens transmitted through oat seeds, besides being the causal agent of oat leaf blight (Làngaro et al, 2001;Carmona et al, 2004;Almeida and Reis, 2009). …”

mentioning

confidence: 99%

Diversidad de hongos en semilla de avena del Valle Central de México

Leyva-Mir

Cervantes-García

Villaseñor-Mir

et al. 2018

Remexca

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El objetivo del presente estudio fue determinar la diversidad e incidencia de hongos fitopatógenos y saprófitos presentes en semilla de avena (Avena sativa L.) obtenida de los cultivares Ágata, Chihuahua y Turquesa, en nueve localidades del valle central de México, durante los ciclos de cultivo primavera-verano 2009 y 2010. Mediante la prueba de Freezing-blotter, se obtuvieron las siguientes especies de hongosfitopatógenos:Alternariaalternarina,A.cerealis,A. uredinis, Bipolaris hawaiiensis, B. sorokiniana, B. spicifera, B. victoriae, Diplodia sp., Drechslera avenacea, Fusarium avenaceum, F. oxysporum, F. poae, F. verticillioides, Phoma sp. y Rhizoctonia solani. Mientras que, los hongos saprófitos encontrados fueron: Alternaria alternata, Aspergillus niger, Cladosporium sp., Chaetomium sp., Coniothyrium sp., Epicoccum sp., Gonatobotrys sp., Graphium sp., Nigrospora sp., Stemphylium sp. y Torula sp. La incidencia total de hongos fue mayor en la variedad Chihuahua, seguida por Ágata y Turquesa. En general, las semillas del ciclo 2009 mostraron una mayor incidencia de hongos.

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Detection and transmission of Drechslera avenae from oat seed

Cited by 11 publications

References 4 publications

Epidemiology and control of seed-borneDrechslera tereson barley

Epidemiology and control of seed-borneDrechslera tereson barley

Comparação da sensibilidade de métodos para a detecção de fungos patogênicos em sementes de aveia branca e preta no Rio Grande do Sul

Diversidad de hongos en semilla de avena del Valle Central de México

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