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Avaliação do nível de resistência do cafeeiro a H. Vastatrix

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dc.contributor.author Costa, W. M.
dc.contributor.author Eskes, A. B.
dc.contributor.author Ribeiro, I. J. A
dc.date.accessioned 2019-01-10T16:38:44Z
dc.date.available 2019-01-10T16:38:44Z
dc.date.issued 1978
dc.identifier.citation COSTA, W. M; ESKES, A. B.; RIBEIRO, I. J. A. Avaliação do nível de resistência do cafeeiro a H. Vastatrix. Bragantia, Campinas, v. 37, n. 4, p. 23-29, 1978. pt_BR
dc.identifier.issn 1678-4499
dc.identifier.uri http://dx.doi.org/10.1590/S0006-87051978000100020 pt_BR
dc.identifier.uri http://www.sbicafe.ufv.br/handle/123456789/10856
dc.description.abstract To study horizontal resistance of coffee plants to H. vastatrix quantitative measurements on resistance are necessary. In this paper the results' of some greenhouse and laboratory tests are compared to field observations. Regular field readings -within the Icatu population, using a 6 point scale for disease access, have shown that a continuous variation for resistance exists within this population. Grafts of 55 plants of Icatu have been inoculated in the greenhouse with race I I of the pathogen. Besides readings using the 6 point scale, estimates on sporulation rate and lesion size were made. The results show a good relation between field and greenhouse observations. Lesion size, however, was less correlated with disease incidence since many plants show large chlorotic areas with only sparse sporulation. As a laboratory method detached leaves and leaf disks have been inoculated and maintained at high relative humidity. Conservation of detached leaves was insatisfactory and this method has been subsequentely abandoned. Leaf disks, when placed, on wetted filter paper in petri dishes, stayed green and apparently healthy for even more than 120 days. An inoculation experiment, using a susceptible, moderate susceptible and resistant plant of Icatu, indicates that the rate of infection of the leaf disks could be a promising parameter for quantitative disease assessments. Investigation with other plant material will be undertaken to further determine the effectiveness of this method. pt_BR
dc.format pdf pt_BR
dc.language.iso pt_BR pt_BR
dc.publisher Instituto Agronômico (IAC) pt_BR
dc.relation.ispartofseries Bragantia;v. 37, n. 4, p. 23-29, 1978
dc.rights Open Access pt_BR
dc.subject.classification Cafeicultura::Pragas, doenças e plantas daninhas pt_BR
dc.title Avaliação do nível de resistência do cafeeiro a H. Vastatrix pt_BR
dc.title Preliminary results on the use of quantitative methods for determining the level of resistance of coffee plants to Hemileia vastatrix pt_BR
dc.type Artigo pt_BR

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