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| Angelotti,Francislene; Scapin,Claudia Regina; Tessmann,Dauri José; Vida,João Batista; Vieira,Rafael Augusto; Souto,Eliezer Rodrigues de. |
| O objetivo deste trabalho foi avaliar a resistência à ferrugem causada pelo fungo Phakopsora euvitis, em genótipos de videira, e a eficiência da infecção de acordo com a idade das folhas e concentração de inóculo. A avaliação foi feita em 15 genótipos, com base nos seguintes componentes de resistência: número de pústulas (urédios) por cm²; tamanho das pústulas; número de esporos produzidos por pústula; e período latente. Os componentes de resistência, com exceção do período latente, apresentaram grande variação quantitativa. A análise multivariada desses componentes diferenciou cinco grupos de genótipos. Os genótipos mais resistentes foram as cultivares porta-enxertos IAC313, IAC572 e IAC766, em que a eficiência da infecção foi baixa, com pústulas menores... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phakopsora euvitis Vitis; Análise multivariada reação de hipersensibilidade resistência genética. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000900005 |
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| Vieira,Rafael Augusto; Scapim,Carlos Alberto; Tessmann,Dauri José; Hata,Fernando Teruhiko. |
| Ten popcorn inbred lines were crossed in a circulant partial diallel matching scheme (group of lines derived from IAC 112 × group of lines from 'Zaeli'). The hybrids were evaluated in respect to grain yield (GY), popping expansion (PE), and resistance to southern rust (Puccinia polysora, Pp), in randomized block design, with three replications. Data was examined by analyses of variance and Kempthorne and Curnow's diallel analysis. General combining ability (GCA) was significant (p < 0.10) in the set 2-Zaeli for GY, PE, and partial resistance to Pp. This indicated that additive gene effects are predominant, and therefore breeding methods of recurrent selection are recommended. However, none of lines had outstanding GCA for GY and PE. The line P8.5 was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; General and specific combining ability; Puccinia polysora; Plant breeding. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902011000300025 |
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| Sanches,Rafael Egea; Scapim,Carlos Alberto; Tessmann,Dauri José; Vieira,Rafael Augusto; Rodovalho,Marcos de Araújo; Milani,Klayton Flávio. |
| The objectives of this study were to identify promising popcorn lines and hybrids for genetic resistance to tropical rust (Tr, Physopella zeae) in diallel crosses of nine lines derived from a large part of Brazilian popcorn germplasm and to estimate genetic parameters for Tr resistance. Crosses and checks were tested in a random block design, with artificial inoculations under greenhouse conditions. Plots consisted of a single 14-L pot, with four plants. Tr was measured by severity and area under the disease progress curve. Data was analyzed by Griffing's diallel model, and genetic parameters were estimated. Heritability estimates to Tr resistance was medium. Specific combining ability-SCA had significant effects (P<0.10) for resistance, and was eight... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Physopella zeae; Genetic parameters; General and specific combining ability; Artificial inoculation. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000600008 |
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| Angelotti,Francislene; Buffara,Claudia Regina Scapin; Tessamnn,Dauri José; Vieira,Rafael Augusto; Vida,João Batista. |
| The protective, eradicative and curative activities of the fungicides azoxystrobin, tebuconazole, pyraclostrobin+metiram, and ciproconazole against grapevine rust, were determined in greenhouse. To evaluate the protective activity, leaves of potted ´Niagara´ (Vitis labrusca) vines were artificially inoculated with an urediniospore suspension of Phakopsora euvitis four, eight or forteen days after fungicidal spray; and to evaluate the curative and eradicative activities, leaves were sprayed with fungicides two, four or eight days after inoculation. Disease severity was assessed 14 days after each inoculation. All tested fungicides present excellent preventive activity against grapevine rust; however, tebuconazole and ciproconazole provide better curative... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Chemical control; Phakopsora euvitis; Vitis sp. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000801367 |
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| Buffara,Cláudia Regina Scapin; Angelotti,Francislene; Vieira,Rafael Augusto; Bogo,Amauri; Tessmann,Dauri José; Bem,Betina Perreira de. |
| The downy mildew, caused by Plasmopora viticola, is one of the most important grapevine (Vitis vinifera) diseases in Southern Brazil, causing defoliation and economic losses. The evaluation of disease severity is an important decision for adoption of strategies and tactics for disease control. Therefore, the objective of this work was to elaborate and to validate a diagrammatic scale to assess downy mildew severity in grapevine, respecting the limitations of visual acuity. The diagrammatic scale with seven levels of disease severity of 1, 3, 6, 12, 25, 50 and 75% was developed in two versions of black-and-white and color scale. The scales were tested and validated by eight raters with and without previous experience with grapevine downy mildew. The raters... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Disease assessment; Pathometry; Plamospara viticola; Vitis vinifera. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000801384 |
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| Marcuz,Fernanda Santos; Souto,Eliezer Rodrigues de; Vieira,Rafael Augusto; Marrafon,Marco Aurélio; Barboza,Antônio Augusto Lazarini; Daros,Edelclaiton. |
| O raquitismo-da-soqueira, causado por Leifsonia xyli subsp. xyli é considerado uma das mais importantes doenças bacterianas da cana-de-açúcar (Saccharum spp.). Para verificar a possível ocorrência de Leifsonia xyli subsp. xyli na região noroeste do Paraná, foi realizado um levantamento em 32 áreas de plantio de duas usinas, utilizando-se o método sorológico "Dot blot" e um protocolo baseado na reação em cadeia da polimerase. As amostras foram coletadas em áreas cultivadas com 8 variedades e 2 clones, a partir de plantas em diferentes épocas de corte, perfazendo um total de 1395 amostras. Constatou-se a presença da bactéria no fluído fibrovascular de plantas da variedade SP77-5181 coletado em uma das propriedades, com índice de incidência de 23%. Esses... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Raquitismo-da-soqueira; Sorologia; PCR. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000700041 |
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