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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Meio Ambiente. |
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Data corrente: |
22/12/1993 |
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Data da última atualização: |
26/01/2000 |
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Autoria: |
PIEROBOM, C. R. |
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Título: |
Studies on pycnidial and ascocarpic fungi which cause leaf spots on wheat in Washington. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
Washington, DC: State University, 1983. |
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Páginas: |
85p. |
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Idioma: |
Inglês |
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Notas: |
Ph.D. Dissertation. |
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Conteúdo: |
A survey on pycnidium- and pseudothecium-producing fugi on wheat leaves was conducted in Washington, in 1980-82. Of extracted fruiting bodies, 47,7% were Septoria tritici, 29.2% were Mycosphaerella and Didymella species combined, 12% Ascochyta ssp., 6,2% Septoria nodorum, 1.2% Leptosphaeria species. Selenophoma donacis and Septoria avenae triticae were present in less than 1%. Of the total examined, 28.0% remain unidentified. Isolation of ascospores ejected from wheat leaves placed in humid chambers allowed the identification of some of the ascomycetes encountered. The Leptosphaeria species were divided into ten groups, on ascospore size and septation. Of these, only Leptosphaeria avenaria triticea and L. eustomoides could be identified since their anamorphs were obtained from single ascopore cultures. The remaining groups, not matching any description or matching more than one description in the literature, could not be identified with confidence. In the didymosporous group, Didymella exitialis, Micosphaerella tassiana and M. graminicola were identified. Didymella exitialis, the telemorph of Ascochyta sp., not previously reported on wheat in Washington occurs abundantly and requires further studies. Mycosphaerella graminicola, the telemorph of Septoria tritici, is rarely found on wheat leaves at harvest stage, but occurs with relative frequency in one year old stubble. Septoria species morphologically similar to S. tritici were found on the dicotyledonnous Stellaria media, Matricaria matricarioides and Lamium amplexicaule, all common wheat fields weeds. Cross-pathogenicity tests and cultural studies revealed several differences among these species and S. tritici, notwithstanding their capability of infect stressed wheat plants.Of the several culture media tested, sterilized corn leaves placed on water agar proved to be an excellent medium for identification and increase of inoculum of both pycnidial and ascocarpic inhabitants of cereal leaves. MenosA survey on pycnidium- and pseudothecium-producing fugi on wheat leaves was conducted in Washington, in 1980-82. Of extracted fruiting bodies, 47,7% were Septoria tritici, 29.2% were Mycosphaerella and Didymella species combined, 12% Ascochyta ssp., 6,2% Septoria nodorum, 1.2% Leptosphaeria species. Selenophoma donacis and Septoria avenae triticae were present in less than 1%. Of the total examined, 28.0% remain unidentified. Isolation of ascospores ejected from wheat leaves placed in humid chambers allowed the identification of some of the ascomycetes encountered. The Leptosphaeria species were divided into ten groups, on ascospore size and septation. Of these, only Leptosphaeria avenaria triticea and L. eustomoides could be identified since their anamorphs were obtained from single ascopore cultures. The remaining groups, not matching any description or matching more than one description in the literature, could not be identified with confidence. In the didymosporous group, Didymella exitialis, Micosphaerella tassiana and M. graminicola were identified. Didymella exitialis, the telemorph of Ascochyta sp., not previously reported on wheat in Washington occurs abundantly and requires further studies. Mycosphaerella graminicola, the telemorph of Septoria tritici, is rarely found on wheat leaves at harvest stage, but occurs with relative frequency in one year old stubble. Septoria species morphologically similar to S. tritici were found on the dicotyledonnous Stellaria media, ... Mostrar Tudo |
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Palavras-Chave: |
Ascochyta spp; Didymella exitialis; Disease; Fungal diseases; Leptosphaeria avenaria triticea; Leptosphaeria eustomoides; Mycosphaerella tassiana; Plant diseases; Pseudothecium; Pycnidium; Selenophoma donacis; Septoria avenae triticea; Wheats. |
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Thesagro: |
Doença de Planta; Doença Fúngica; Folha; Fungo; Septoria Nodorum; Septoria Tritici; Trigo; Triticum Aestivum. |
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Thesaurus Nal: |
fungi; Lamium amplexicaule; leaves; Matricaria matricarioides; Mycosphaerella graminicola; Stellaria media; wheat. |
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Categoria do assunto: |
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Marc: |
LEADER 03258nam a2200469 a 4500
001 1563870
005 2000-01-26
008 1983 bl uuuu m 00u1 u #d
100 1 $aPIEROBOM, C. R.
245 $aStudies on pycnidial and ascocarpic fungi which cause leaf spots on wheat in Washington.
260 $aWashington, DC: State University$c1983
300 $a85p.
500 $aPh.D. Dissertation.
520 $aA survey on pycnidium- and pseudothecium-producing fugi on wheat leaves was conducted in Washington, in 1980-82. Of extracted fruiting bodies, 47,7% were Septoria tritici, 29.2% were Mycosphaerella and Didymella species combined, 12% Ascochyta ssp., 6,2% Septoria nodorum, 1.2% Leptosphaeria species. Selenophoma donacis and Septoria avenae triticae were present in less than 1%. Of the total examined, 28.0% remain unidentified. Isolation of ascospores ejected from wheat leaves placed in humid chambers allowed the identification of some of the ascomycetes encountered. The Leptosphaeria species were divided into ten groups, on ascospore size and septation. Of these, only Leptosphaeria avenaria triticea and L. eustomoides could be identified since their anamorphs were obtained from single ascopore cultures. The remaining groups, not matching any description or matching more than one description in the literature, could not be identified with confidence. In the didymosporous group, Didymella exitialis, Micosphaerella tassiana and M. graminicola were identified. Didymella exitialis, the telemorph of Ascochyta sp., not previously reported on wheat in Washington occurs abundantly and requires further studies. Mycosphaerella graminicola, the telemorph of Septoria tritici, is rarely found on wheat leaves at harvest stage, but occurs with relative frequency in one year old stubble. Septoria species morphologically similar to S. tritici were found on the dicotyledonnous Stellaria media, Matricaria matricarioides and Lamium amplexicaule, all common wheat fields weeds. Cross-pathogenicity tests and cultural studies revealed several differences among these species and S. tritici, notwithstanding their capability of infect stressed wheat plants.Of the several culture media tested, sterilized corn leaves placed on water agar proved to be an excellent medium for identification and increase of inoculum of both pycnidial and ascocarpic inhabitants of cereal leaves.
650 $afungi
650 $aLamium amplexicaule
650 $aleaves
650 $aMatricaria matricarioides
650 $aMycosphaerella graminicola
650 $aStellaria media
650 $awheat
650 $aDoença de Planta
650 $aDoença Fúngica
650 $aFolha
650 $aFungo
650 $aSeptoria Nodorum
650 $aSeptoria Tritici
650 $aTrigo
650 $aTriticum Aestivum
653 $aAscochyta spp
653 $aDidymella exitialis
653 $aDisease
653 $aFungal diseases
653 $aLeptosphaeria avenaria triticea
653 $aLeptosphaeria eustomoides
653 $aMycosphaerella tassiana
653 $aPlant diseases
653 $aPseudothecium
653 $aPycnidium
653 $aSelenophoma donacis
653 $aSeptoria avenae triticea
653 $aWheats
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Embrapa Cerrados (CPAC) |
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| Registros recuperados : 30 | |
| 14. |  | NUNES, C. D. M.; CARVALHO, F. I. F.; PIEROBOM, C. R.; OLIVEIRA, A. C. Genética da resistência de cultivares de arroz à raça IA-1 de Pyricularia grisea. Fitopatologia Brasileira, Brasilia, DF, v. 32, n.1, p. 64-69, jan./fev, 2007.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - A |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 18. | | TRIGO, M. F. O.; PIEROBOM, C. R.; NEDEL, J. L.; TRIGO, L. F. N. Tratamento térmico em sementes de cenoura. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 33, n. 3, p. 357-361, mar. 1998 Título em inglês: Heat treatment on carrot seeds.| Biblioteca(s): Embrapa Unidades Centrais. |
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| Registros recuperados : 30 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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