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A antracnose do sorgo. Repositório Alice
COSTA, R. V. da; CASELA, C. R.; ZAMBOLIM, L.; FERREIRA, A. S..
The Sorghum anthracnose Anthracnose, caused by Colletotrichum graminicola, has been the most destructive disease affecting sorghum (Sorghum bicolor) crops in Brazil. Three phases of the disease are recognized: foliar anthracnose, anthracnose stalk rot, and panicle and grain anthracnose. Foliar anthracnose, the most destructive phase of the disease, usually appears 30-40 days after emergence, during growth stage 4.0 or later. Colletotrichum graminicola may survive as mycelium, conidia and microsclerotia, up to 18 months in crop debris, on or above the soil surface, in alternate hosts, and as mycelium in infected seeds. Microsclerotia are produced in sorghum stalks of susceptible cultivars and survive better in crop debris on the soil surface. This pathogen...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Evelopmental-stages; Fungal-diseases; Plant-diseases; Plant-pathogenic-fungi; Plant-pathogens; Survival-; Virulence-.
Ano: 2003 URL: http://www.alice.cnptia.embrapa.br/handle/doc/489116
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Variability of the anthracnose fungus Colletotrichum graminicola in sorghum genotype mixtures. Repositório Alice
VALERIO, H. M.; CASELA, C. R.; RESENDE, M. A.; SANTOS, F. G..
This paper reports partial results obtained on the variability of Colletotrichum graminicola developed in response to the host diversity generated by three-line combination of sorghum (Sorghum bicolor) genotypes. Nine sorghum lines were used in this study: CMSXS210B, CMSXS112B, CMSXS215B, CMSXS221B, CMSXS169R, CMSXS180R, CMSXS182R, CMSXS227R, and CMSXS116R. A total of 39 treatments on mixtures and pure stands of the component lines were evaluated in the field for the development of anthracnose, as a natural epidemic. Samples of the single spore isolates of the pathogen of each treatment indicated a reduction in the phenotypic diversity and an increase in the frequency of more complex races in genotype mixturesin relation to the pure stands of each...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Epidemiology-; Fungal-diseases; Genetic-diversity; Genotypes-; Lines-; Plant-diseases; Plant-pathogenic-fungi; Plant-pathogens; Races-; Spores-; Virulence-.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/489115
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