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First record of occurrence of mosca-negra-dos-citrus, Aleurocanthus woglumi Ashby, 1915 (Hemiptera: Sternorrhyncha: Aleyrodidae) in Roraima, Brazil = Primeiro registro da ocorrência de mosca-negra-dos-citros, Aleurocanthus woglumi Ashby, 1915 (Hemiptera: Aleyrodidae) em Roraima
Ruy Guilherme Correia,Antonio Cesar Silva Lima,Paulo Roberto Silva Farias,Francisco Clemilto da Silva Maciel
Agro@mbiente On-line , 2011,
Abstract: The Aleurocanthus woglumi Ashby (Hemiptera: Aleyrodidae) is an important pest of citrus. Originated in Asia, this pest was detected in Brazil for the first time in the State of Para, Brazil in 2001. In the culture of citrus fruits the black fly carries direct and indirect damage, impeding the development and production of plants. In addition to restricting trade in local areas from its occurrence to the presence of the plague, since the A. woglumi quarantine pest is considered present (A2) of high alert in accordance with Instruction No 23, April 29, 2008, established by the Ministério da Agricultura, Pecuária e Abastecimento of the Brazil. The objective of this paper was to record the first occurrence of Aleurocanthus woglumi in the State of Roraima, Brazil.= A mosca-negra-dos-citros, Aleurocanthus woglumi Ashb, (Hemiptera: Aleyrodidae) é uma importante praga dos citros. De origem asiática, esta praga foi detectada no Brasil pela primeira vez no estado do Pará no ano de 2001. Na cultura dos citros a mosca-negra acarreta danos diretos e indiretos, prejudicando o desenvolvimento e produ o das plantas. Além de restringir o comércio de locais de sua ocorrência para áreas livres da presen a da praga, visto que o A. woglumi é considerado praga quarentenária presente (A2) de alerta máximo de acordo com a instru o normativa No 23, de 29 de abril de 2008; estabelecida pelo Ministério da Agricultura, Pecuária e Abastecimento. Objetivou-se com o presente trabalho registrar a primeira ocorrência de mosca-negra-dos-citros no estado de Roraima.
Genetic characterization of Xylella fastidiosa isolated from citrus and coffee plants
Miranda, Vicente Savonitti;Farias, Paulo Roberto Silva;Roberto, Sérgio Rufo;Lacava, Pedro Magalh?es;
Scientia Agricola , 2007, DOI: 10.1590/S0103-90162007000500005
Abstract: the citrus variegated chlorosis and the coffee leaf scorch are some of the many destructive diseases caused by xylella fastidiosa, a gram-negative bacterium limited to the xylem of affected plants. as its genetic characterization is still not well established, different isolates of x. fastidiosa from citrus and coffee were evaluated through rapd (random amplified polymorphic dna) technique to characterize and classify these isolates based on similarity coefficients. sixteen isolates of x. fastidiosa were used on this trial, obtained from citrus, coffee and almond. the genetic polymorphism evaluation was performed using six arbitrary 10-base primer pairs. it was possible to establish a dendogram in which the isolates were classified into five groups (a, b, c, d and e). a prevalence of citrus isolates in groups a and d was observed. in groups b and c, there was a prevalence of coffee isolates meanwhile the group d consisted of the almond isolate, solely.
INFLUêNCIA DA TEMPERATURA E PRECIPITA O NA INFESTA O DE MOSCA-NEGRA-DOS-CITROS (Aleurocanthuswoglumi) EM PLANTIO DE CITROS
SILVA, Anderson Gon?alves,BOI?A JUNIOR, Arlindo Leal,FARIAS, Paulo Roberto Silva
Nucleus , 2011,
Abstract: The citrus industry in the state of Pará, has important economic and social role, by raisingforeign currency for the state, besides employment generation and the heating of the local economy. Among themajor disease problems of the state, the citrus blackfly (Aleurocanthus woglumi), stands out for causing damagesthat can compromise up to 80% of production. Thus the objective was with the present work to evaluate theinfluence of abiotic factors (temperature and precipitation) in a natural infestation of blackfly in the citrusplanting in the state of Pará. The study was conducted from September 2008 to August 2009. Were performed 12samples by assessing the infestation in the experimental area. Were used correlations between infestation ofplants with presence of blackfly and ace variables rainfall (mm) and minimum temperature, average andmaximum (° C). As main conclusions, stand out that the experimental area was found to be infested during allassessments, the monthly average temperature (° C) influenced in the regulation of pest population and heavyrain reduced the infestation of blackfly of citrus.A citricultura, no estado do Pará, exerce importante papel econ mico e social, através dearrecada o de divisas para o estado; além da gera o de empregos e aquecimento da economia local. Dentre osprincipais problemas fitossanitários do estado, a mosca-negra-dos-citros (Aleurocanthus woglumi), destaca-sepor acarretar prejuízos que podem comprometer até 80% da produ o. Dessa forma objetivou-se com o presentetrabalho avaliar a influência de fatores abióticos (temperatura e precipita o) na infesta o natural de moscanegra-dos-citros em plantio de citros no estado do Pará. O trabalho foi desenvolvido de setembro de 2008 aagosto de 2009. Fez-se 12 amostragens avaliando-se a infesta o da praga na área experimental. Utilizou-secorrela es entre infesta o de plantas com presen a de mosca negra e ás variáveis precipita o pluviométrica(mm) e temperaturas mínima, média e máxima (oC). Como principais conclus es obtidas destaca-se que a áreaexperimental mostrou-se infestada durante todas as avalia es; a temperatura média mensal (oC) influenciou naregula o da popula o da praga e chuvas intensas reduziram a infesta o da mosca-negra-dos-citros.
Agricultura de precis?o: mapeamento da produtividade em pomares cítricos usando geoestatística
Farias, Paulo Roberto Silva;Nociti, Leticia Ane Sizuki;Barbosa, José Carlos;Perecin, Dilermando;
Revista Brasileira de Fruticultura , 2003, DOI: 10.1590/S0100-29452003000200013
Abstract: the yield variability of sweet orange groves located in luiz antonio country, sao paulo state, brazil, was evaluated using geostatistics. through the kriging maps, areas with higher and lower yields in the groves were determinated. a great variability of yield and fruit size on irrigated and non-irrigated groves was verified. thus, the geostatistic showed to be an extremely useful tool to enhance precision agriculture programs.
Amostragem seqüencial com base na lei de Taylor para levantamento de Spodoptera frugiperda na cultura do milho
Farias, Paulo Roberto Silva;Barbosa, José Carlos;Busoli, Ant?nio Carlos;
Scientia Agricola , 2001, DOI: 10.1590/S0103-90162001000200025
Abstract: armyworm (spodoptera frugiperda) is one of the most important pests of corn in the americas, which can damage all plant growth stages, resulting in yield losses ranging from 15 to 37%. in this research, the spatial distribution of this pest was evaluated in the field, to develop a sampling system to estimate population density. three experimental areas of 40 m x 250 m each, subdivided in 100 plots were chosen, and the number of small and large caterpillars of s. frugiperda was counted at 14 sampling dates. ten random corn plants per plot were used, totalizing 1,000 plants per field for each sampling. insects were observed in the inner and outer parts of the leafworl, which were opened prior to counting. caterpillars were classified as small and large, depending on their length, when the length was less than or and more than 0.1 m, respectively. taylor's law parameters were estimated, resulting highly significant regressions for all insect stages. the b parameter in taylor's law for small caterpillars was greater than 1 (1.57), which indicated that the distribution at this stage is aggregated. the b parameter was lower than 1 for large caterpillars (0.79), indicating a random distribution. results for all caterpillars were similar to that observed for small ones. a sequential counting plan was developed based on the a and b parameters of taylor's law.
Agricultura de precis o: mapeamento da produtividade em pomares cítricos usando geoestatística
Farias Paulo Roberto Silva,Nociti Leticia Ane Sizuki,Barbosa José Carlos,Perecin Dilermando
Revista Brasileira de Fruticultura , 2003,
Abstract: A variabilidade espacial de produtividade e tamanho de frutos foi avaliada em pomares de laranja irrigados e n o irrigados, localizados no município de Luiz Ant nio - SP, utilizando-se de geoestatística. Através dos mapas de krigagem, podem-se determinar as áreas de alta e baixa produtividade dos talh es. Verificou-se maior variabilidade para produtividade e tamanho de frutos nas quadras irrigadas e n o irrigadas. Portanto, a geoestatística mostrou-se uma ferramenta extremamente útil para auxiliar em Programas de Agricultura de Precis o.
Amostragem seqüencial com base na lei de Taylor para levantamento de Spodoptera frugiperda na cultura do milho
Farias Paulo Roberto Silva,Barbosa José Carlos,Busoli Ant?nio Carlos
Scientia Agricola , 2001,
Abstract: A lagarta do cartucho do milho é uma das principais pragas do milho nas Américas, podendo ocorrer durante todos os estágios de crescimento da cultura, causando perdas de 15 a 37% na produ o. Neste trabalho estudou-se a distribui o espacial dessa praga no campo, com a finalidade de desenvolver um sistema de amostragem para estimar sua densidade populacional. Na área cultivada com milho foram selecionados 3 campos experimentais de 40 m x 250 m cada, divididos em 100 parcelas cada. Foram contados o número de lagartas pequenas e grandes de S. frugiperda nas folhas e no cartucho das plantas, em 10 plantas ao acaso por parcela, num total de 1000 plantas por campo, em 5, 5 e 4 datas de amostragem, respectivamente. Lagartas menores que 1 cm eram consideradas pequenas e lagartas maiores que 1 cm, grandes. Foram estimados os parametros da lei de Taylor, sendo as estimativas dos parametros das regress es altamente significativas para todas as categorias larvais. O parametro b da lei de Taylor para lagarta pequena foi igual a 1,57, indicando que a forma de distribui o dessa categoria larval é agregada. Para lagartas grandes o parametro b foi igual a 0,79, o que conduz a um tipo de distribui o tendendo para aleatoriedade. Para o número total de lagartas os resultados s o equivalentes aos obtidos para lagartas pequenas. Foi desenvolvido um plano de amostragem seqüencial com base nos parametros da lei de Taylor.
Infesta??o da mosca-negra-dos-citros (Aleurocanthus woglumi Ashby) em pomares de citros, em sistemas de plantio convencional e agroflorestal
Silva, Anderson Gon?alves Da;Boi?a Junior, Arlindo Leal;Farias, Paulo Roberto Silva;Barbosa, José Carlos;
Revista Brasileira de Fruticultura , 2011, DOI: 10.1590/S0100-29452011005000038
Abstract: the purpose of this study was to evaluate the infestation of citrus blackfly the in a citrus orchard in conventional tillage systems and agroforestry. the experimental area is located in the municipality of capit?o po?o, pa, where 12 samples were taken during the period from september 2008 to october 2009, evaluating the presence or absence of the pest in both production systems. the results showed that the system of agroforestry plantation showed higher incidence of plants with presence of citrus blackfly compared to conventional, there was influence of temperature on the regulation of pest population and heavy rain reduced the number of plants with presence of a.woglumi.
CD34 e caspase-3: compara??o, correla??o de express?o e quantifica??o imunoistoquímica no adenocarcinoma gástrico
Silva, Paulo Henrique Freitas Farias;Cuenca, Ronaldo Mafia;Ribas-Filho, Jurandir Marcondes;Ribas, Carmen Australia Paredes Marcondes;Malafaia, Osvaldo;Dobrowolski, Samuel;Bora, Fabio Roberto;
ABCD. Arquivos Brasileiros de Cirurgia Digestiva (S?o Paulo) , 2008, DOI: 10.1590/S0102-67202008000400006
Abstract: background: gastric cancer continues to defy the modern medicine in the understanding of its biological behavior and surgical cure. aim: to determine, compare and correlate the expression of caspase-3 and cd34 in gastric adenocarcinoma with clinical and pathological factors and proximal/distal gastric tumors. methods: imunohistochemistry quantitative analysis of the antibodies anti-caspase-3 polyclonal of rabbit and cd43 mouse's monoclonal, to mark adenocarcinoma cells in 26 cd34's cases and 22 caspase-3 paraffined blocks were used. the parameters were: labeling index in percentage and optic density. results: caspase-3 and cd34 expression were elevated; the average and the deviation standard for labeling index were respectively 87,72% ±7,89 and 84,86% ±9,17; for optic desity 60,75±7,46 and 49,84±8.48. when markers were compared with optic density it was found significant differences between caspase-3 (60,94) and cd34 (50,27). caspase-3 average (60,94) was higher than cd34 (50,27), p<0.001. the correlation among markers was positive for cd34's optic density versus labeling index of cd34 (p=0.006, r=0,520) and for optic density of caspase-3 versus caspase-3 labeling index (p=0.015, r=0.512). the markers had no correlation in the comparison of labeling index and optic densities with the gastric curvature, tumor differentiation, borrmann classification and lymphatic invasion. gender and age also did not correlate with the markers. the correlation with the tumor location had differences favoring the ones on distal part. conclusion: caspase-3 and cd34 expressions are elevated in gastric adenocarcinoma. caspase-3 optic density is higher than cd34's optic density. there is no expression and quantification correlation between markers and the clinical and pathological factors, but there are evidences that they have biological differences when in different gastric anatomical parts.
Avalia??o de cultivares de alface em ambiente protegido em Boa Vista, Roraima, Brasil
Araújo, Wellington Farias;Trajano, Eliander Pimentel;Rodrigues Neto, José Luiz;Mour?o Júnior, Moisés;Pereira, Paulo Roberto Valle da Silva;
Acta Amazonica , 2007, DOI: 10.1590/S0044-59672007000200018
Abstract: this study evaluated the growth and yield of six lettuce cultivars under protected cultivation. the experimental design was randomized blocks with six treatments and four replications. the cultivars hortencia, rubra, monica sf1, regina de ver?o, veronica and grandes lagos 659 were evaluated. the air temperature under protected cultivation oscillated between 24,4oc and 31,5oc during the experimental period. rubra and grandes lagos 659 showed the best performance with yields superior to 28,000 kg.ha-1 and fresh weight of 176,7g and 184,4 g, respectively.
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