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Exigências Térmicas e Estimativa do Número de Gera??es de Argyrotaenia sphaleropa (Meyrick) (Lepidoptera: Tortricidae)
Neotropical Entomology , 2001, DOI: 10.1590/S1519-566X2001000400007
Abstract: argyrotaenia sphaleropa (meyrick) is often found attacking diospyros kaki fruits in southern region of brazil. duration and viability of the periods (eggs, larvae and pupae) and lifespan of the pest was studied under laboratory conditions in different temperatures. the experiment was conducted in climatic chambers under 60±10% rh and 14h photophase, at temperatures of 14, 18, 20, 22, 25, 28 and 30oc, using artificial diet. larval eclosion occurred in 5.9 to 25.4 days and larval period ranged from 13.9 to 91.1 days at 30 and 14oc, respectively. a variation of 6.4 (30oc) to 28.3 (14oc) and 26.5 (30oc) to 143.4 (14oc) days was observed for pupal phase and lifespan. eggs, larvae and pupae viability was always higher than 75% while the lower total viability was 64.8% at 18oc. for eggs, larvae, pupae and total cycle, the threshold temperature and thermal requirements were respectively 10.8, 10.9, 10.0 and 11.0oc and 104.3, 251.4, 114.9 and 473.3 degree days. for a. sphaleropa the occurrence of the 4.1 and 14.7 generations per year were estimated in the field and in the laboratory (30oc), respectively. temperatures of 14 and 18oc were less favorable for the insect development, with increase in time of development and decrease in survivorship.
Aspectos biológicos de Argyrotaenia sphaleropa (Meyrick 1909) (Lepidoptera: Tortricidae) em dietas artificiais com diferentes fontes proteicas
Manfredi-Coimbra, Silvana;Garcia, Mauro Silveira;Loeck, Alci Enimar;Botton, Marcos;Foresti, Josemar;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000200002
Abstract: biology aspects of argyrotaenia sphaleropa meyrick fed on artificial diets with different protein sources were studied: d1-white bean, wheat germ, soybean protein and casein; d2-common bean and yeast and d3-common bean, yeast and wheat germ, evaluating the duration and viability of all developmental stages (egg, larval, prepupa and pupa) and of the total cycle (egg-adult), sex ratio, pupa weight, fecundity, longevity and life table of fertility. tests were conducted in the laboratory at 25±1°c, 65±10% rh and 14h of photophase. duration of the egg stage was 6.6 days on all diets. the longest duration of larval and prepupal stages on d1 and pupal stages on d2, resulting in a longer duration of the total cycle on these two diets (30,9 and 30,8 days). the total viability was higher than 62% on all diets, and there was no statistical difference among the treatments. the number of instars was four or five on all treatments. the lowest fecundity was observed in d1. based on the fertility life table, d3 was the most suitable diet for rearing a. sphaleropa, due to the lowest development time (t), the highest finite increasing rate (l), and total viability exceeding 75%.
Danos do percevejo barriga-verde Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) em trigo
Manfredi-Coimbra, Silvana;Silva, Jovenil José da;Chocorosqui, Viviane Ribeiro;Panizzi, Ant?nio Ricardo;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000600003
Abstract: the objective of this study was to evaluate the reaction of two cultivars of wheat to the damage caused by adults of the green belly stink bug, dichelops melacanthus (dallas), confined on the culture from the beginning of tillering. the effect of different infestation levels (0, 2, 4, 8 and 16 bugs m-2) on the number of tillers m-2, number of spikes m-2, weight of 1,000 seeds (g), and yield (kg ha-1) was evaluated on wheat cvs. ?br 18' and ?brs 193', in londrina, paraná state. the number of tillers m-2 increased linearly on ?br 18' and in a quadratic form on ?brs 193', with the increase of the number of bugs m-2; the number of spikes m-2, the weight of 1,000 seeds, and the yield decreased linearly with the increase of the infestation level on both cultivars. ?brs 193' was the most susceptible to the attack of d. melacanthus, showing a reduction of 254.4kg for each unit of increase in the number of bugs m-2.
Efeito de dietas artificiais para a alimenta??o de adultos de Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae), em laboratório
Fonseca, Fabiana Lazzerini da;Manfredi-Coimbra, Silvana;Foresti, Josemar;Kovaleski, Adalecio;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000600001
Abstract: adults of bonagota cranaodes (meyrick) (lepidoptera: tortricidae) were maintained in cages of transparent pvc without food, with water, and fed with honey solution at 10% and with honey solution at 10% + 25% of beer only with water and without feeding to evaluate their fecundity, longevity and viability of eggs in growth to (25±1°c and 70±10% of ru). the longevity of females and males was longer and number of eggs/female were obtained in the mean substratum composed of honey at 10% (17,75 days, 17,35 days and 14,07 eggs/posture) and honey at 10% + 25% of beer (18,25 days, 18,20 days and 12,71 eggs/posture). the viability of the eggs and the duration of the embryonic period was similar in all the treatments. the mean with honey at 10% + 25% of beer, presented effects similar to the mean composed with honey at 10% regarding to the longevity, fertility and viability of eggs of b. cranaodes. however, due to the lower cost, the diet based only in honey represents the best choice in laboratory for maintenance rearing of this insect.
Aspectos biológicos de Argyrotaenia sphaleropa (Meyrick 1909) (Lepidoptera: Tortricidae) em dietas artificiais com diferentes fontes proteicas
Manfredi-Coimbra Silvana,Garcia Mauro Silveira,Loeck Alci Enimar,Botton Marcos
Ciência Rural , 2005,
Danos do percevejo barriga-verde Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) em trigo
Manfredi-Coimbra Silvana,Silva Jovenil José da,Chocorosqui Viviane Ribeiro,Panizzi Ant?nio Ricardo
Ciência Rural , 2005,
Abstract: O objetivo deste estudo foi avaliar a rea o de dois cultivares de trigo aos danos causados por percevejos adultos de Dichelops melacanthus (Dallas), confinados sobre a cultura a partir do início do perfilhamento. Foram comparados os efeitos de diferentes níveis de infesta o (0, 2, 4, 8 e 16 percevejos m-2) sobre o número de perfilhos m-2, número de espigas m-2, peso de mil sementes (g) e rendimento (kg ha-1) das cultivares ?BR 18' e ?BRS 193' de trigo, em Londrina, PR. O número de perfilhos m-2 cresceu linearmente para a cv. ?BR 18' e de forma quadrática para a cv. ?BRS 193' com o aumento do número de percevejos m-2; o número de espigas m-2, o peso de mil sementes, e o rendimento decresceram de forma linear com o aumento do nível de infesta o para as duas cultivares. ?Acv.BRS 193' foi mais suscetível ao ataque de D. melacanthus, apresentando uma redu o de 254,4kg para cada unidade de aumento no número de percevejos m-2.
Efeito de dietas artificiais para a alimenta o de adultos de Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae), em laboratório
Fonseca Fabiana Lazzerini da,Manfredi-Coimbra Silvana,Foresti Josemar,Kovaleski Adalecio
Ciência Rural , 2005,
Abstract: Adultos de Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae) submetidos a tratamentos com água, solu o de mel a 10%, solu o de mel a 10% + 25% de cerveja e sem alimento foram mantidos em gaiolas de PVC transparente para avaliar a fecundidade, longevidade e viabilidade de ovos em laboratório a 25?1degreesC e 70?10% de UR. Maior longevidade de fêmeas e machos e número de ovos/fêmea foram obtidos nos substratos compostos de mel a 10% (17,75 dias, 17,35 dias e 14,07 ovos/postura) e mel a 10% + 25% de cerveja (18,25 dias, 18,20 dias e 12,71 ovos/postura). A viabilidade dos ovos e a dura o do período embrionário foram semelhantes em todos os tratamentos. O substrato alimentar mel a 10% + 25% de cerveja, apresentou efeitos semelhantes ao substrato composto de apenas mel a 10% sobre a longevidade, fertilidade e viabilidade dos ovos. Entretanto, devido ao menor custo, a dieta a base de mel apresenta melhor potencial de utiliza o para manuten o da cria o do inseto em laboratório.
Metodologias para reutiliza??o do resíduo de terra diatomácea, proveniente da filtra??o e clarifica??o da cerveja
Goulart, Marcos Roberto;Silveira, Cristian Berto da;Campos, Mari Lúcia;Almeida, Jaime Antonio de;Manfredi-Coimbra, Silvana;Oliveira, Aline Fernandes de;
Química Nova , 2011, DOI: 10.1590/S0100-40422011000400014
Abstract: the earth diatomite is a material used by the industries in the filtration process and clarification of the beer. this material presents a reduced useful life due to the blockages of their pores during the filtration process. the objective of this work was to reactivate the properties of filtration of the earth diatomite, saturated with organic matter during the filtration stage, starting from a controlled thermal treatment. the obtained results demonstrated that the earth diatomite saturated with organic matter submitted to a controlled thermal treatment has their filtration properties reactivated, could be reused in the beer production process.
Reflexos da intera??o genótipo X ambiente e suas implica??es nos ganhos de sele??o em genótipos de feij?o (Phaseolus vulgaris L.)
Coimbra, Jefferson Luís Meirelles;Guidolin, Altamir Frederico;Carvalho, Fernando Irajá Felix de;Coimbra, Silvana Manfredi Meirelles;Hemp, Silmar;
Ciência Rural , 1999, DOI: 10.1590/S0103-84781999000300009
Abstract: the importance of grains of legume plants for human feeding, specially black beans (phaseolus vulgaris l.), has stimulated the breeders to select genotypes with high grains yield potential and wide adaptability to different conditions of cultivation in southern brazil. the present work aimed at evaluating the reflexes of the genotype x environment interaction and its implications in the genetic gains of different selection approaches. the results revealed that the component of the interaction between genotype and environment overestimates the prediction of genetic parameters such as genetic variance and heritability. differences among these estimates were observed apparently due to a high percentage of the complex part of the interaction. besides, the genetic gains obtained with the direct selection were always superior to the indirect response. comparatively, the pair of environments 1x3 revealed correlated response inferior and of opposite sign to the other estimates for the other pairs of environments studied. the first environment was the one which accumulated the higher interaction genotype by environment. it can be concluded that the interaction component has great relevance in the estimates of genetic gains, evidencing that this influence should be considered in the selection and in the recommendation of specific genotypes of bean breeding programs.
Análise de trilha. I: análise do rendimento de gr?os e seus componentes
Coimbra, Jefferson Luís Meirelles;Guidolin, Altamir Frederico;Carvalho, Fernando Irajá Felix de;Coimbra, Silvana Manfredi Meirelles;Marchioro, Volmir Sergio;
Ciência Rural , 1999, DOI: 10.1590/S0103-84781999000200005
Abstract: thirty two bean accesses (phaseolus vulgaris l.) were evaluated for the influence of eight characters of agronomic importance the production of grains for unit of area, in lages/sc. the experiment, in randomized blocks with four repetitions, was conducted during the period off-season in the agricultural year of 1996/97. this work aimed estimating the degree of association between grain yield and its secondary components. the first group of variables (primary) was constituted by the number of grains per pod, number of pods per plant, weight of a thousand grains and the population of plants (pop). the second group (secondary), was constituted by the number of days between emergence and flowering (fl), number of days between emergence and harvesting point (mc), plant stature (ep) and the height of first pod insertion (pil). for the analysis of the trail coefficient, the direct and indirect effects of primary characters nlp and pmg were characterized and evaluated, revealing the large direct effects associated with the high correlation. the nlp was highly influenced by plants of shorter cycle and higher stature. the trail coefficients allow to point out that the largest direct effects on the yield of grains nlp are mainly associated to pmg, ngl and cycle of the plant.
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