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	Provedor de dados Trop. Plant Pathol. (3) Neotropical Entomology (1) Autor FERREIRA,ALEXANDRE S. (4) CASELA,CARLOS R. (3) SANTOS,FREDOLINO G. (3) FOSTER,JOHN E. (1) RODRIGUES,JOSÉ A.S. (1) VILELLA,FRANCYS M.F. (1) WAQUIL,JOSÉ M. (1) Mais... Palavra-chave Sorghum bicolor (2) Virulence (2) Anthracnose (1) Colletotrichum graminicola (1) Fitness (1) Host plant resistance (1) Insect-plant interaction (1) Insecta (1) Sorghum IPM (1) Southern rust (1) Sugarcane borer (1) Mais... Tipo do documento Info:eu-repo/semantics/other (3) Info:eu-repo/semantics/article (1) Ano 2002 (1) 2001 (3) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Differences in competitive ability among races of Colletotrichum graminicola in mixtures Trop. Plant Pathol. CASELA,CARLOS R.; FERREIRA,ALEXANDRE S.; SANTOS,FREDOLINO G.. Mixtures of races of Colletotrichum graminicola, causing sorghum (Sorghum bicolor) anthracnose and differing in their virulence range, were inoculated for five and six generations on the susceptible sorghum cultivar BR009 (Tx623), in two experiments in a greenhouse. In each generation a sample of 50 single spore isolates was obtained and inoculated on a standard differential set to determine the proportion of each race in the mixture. Isolates of the race 30A, with the narrowest virulence range, predominated over isolates of the more complex races 31B, 31C and 31E indicating the existence of differences in the survival ability among races of this pathogen. Tipo: Info:eu-repo/semantics/other Palavras-chave: Colletotrichum graminicola; Virulence; Fitness; Sorghum bicolor; Anthracnose. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582001000200019 Reaction of sorghum genotypes to the anthracnose fungus Colletotrichum graminicola Trop. Plant Pathol. CASELA,CARLOS R.; SANTOS,FREDOLINO G.; FERREIRA,ALEXANDRE S.. The reactions of 22 sorghum (Sorghum bicolor) genotypes to six previously identified races of the sorghum anthracnose fungus Colletotrichum graminicola, were evaluated under greenhouse and field conditions. Races were inoculated in separate tests in the greenhouse. In the field, spreader rows of a susceptible genotype were artificially inoculated with a mixture of the six races of the pathogen. In the greenhouse tests, nine genotypes showed resistance to all six races. In the field high levels of dilatory resistance was observed in the sorghum genotypes CMSXS169 and CMSXS373. Tipo: Info:eu-repo/semantics/article Palavras-chave: Sorghum bicolor; Host plant resistance. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582001000200014 Resistance of Commercial Hybrids and Lines of Sorghum, Sorghum bicolor (L.) Moench., to Diatraea saccharalis (Fabr.) (Lepidoptera: Pyralidae) Neotropical Entomology WAQUIL,JOSÉ M.; RODRIGUES,JOSÉ A.S.; SANTOS,FREDOLINO G.; FERREIRA,ALEXANDRE S.; VILELLA,FRANCYS M.F.; FOSTER,JOHN E.. Commercial sorghum hybrids and Embrapa's lines were evaluated regarding resistance to sugarcane borer. Two field experiments were conducted in Sete Lagoas, MG, under natural infestation, during the second cropping season in a randomized complete block with 3 replicates. The plants were evaluated regarding to stand, maturity cycle, plant height, and number of broken or lodging stalks and yield. The borer incidence, number of galleries, number of healthy and damaged nodes were also evaluated to calculate the Infestation Index and Intensity Infestation Index. Among the commercial sorghum hybrids, Br 304 and CMSXS 9701 were the least infested wile Z 732 and Esmeralda were the least damaged. Among the lines, the least infested was 9815017 and least damaged... Tipo: Info:eu-repo/semantics/other Palavras-chave: Insecta; Sugarcane borer; Sorghum IPM; Insect-plant interaction. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2001000400022 Variability in isolates of Puccinia polysora in Brazil Trop. Plant Pathol. CASELA,CARLOS R.; FERREIRA,ALEXANDRE S.. The main objective of this work was to evaluate the variability of the southern rust pathogen Puccinia polysora in Brazil, based on its virulence on a set of maize (Zea mays) cultivars. Sixty single pustule isolates, from different areas of occurrence of southern rust, were evaluated for their virulence to 50 maize experimental hybrids. Six cultivars showed a clear distinction between susceptible and resistant reaction, and were used to characterize the variability of the pathogen. Seventeen virulence patterns were identified among the 60 isolates tested. The most frequent virulence patterns identified, were observed in all locations of sampling, which suggests the absence of geographical differentiation among prevalent populations of P. polysora in Brazil. Tipo: Info:eu-repo/semantics/other Palavras-chave: Southern rust; Virulence. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000400015 Registros recuperados: 4 Primeira ... 1 ... Última

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