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Performance of an oligophagous insect in relation to the age of the host plant Neotropical Entomology
Campos,Wellington G.; Schoereder,José H.; Picanço,Marcelo C..
The performance of monophagous and oligophagous herbivore insects should be negatively influenced by the ageing of their host plants. Plutella xylostella L. (Lepidoptera: Yponomeutidae), a specialist in Cruciferae, was reared in the laboratory on detached cabbage leaves (Brassica oleraceae var. capitata). We used fourth expanded leaves from differently aged plants, and leaves from three strata of the mature plant. Plant ageing increased pre-imaginal mortality and reduced larval developing rate, pupae weight, and fecundity. The insect net reproductive rate (Ro) and intrinsic rate of population growth (r) decreased as plant aged. No leaf category of mature plants was qualitatively superior to leaves from younger plants. If there exist a positive correlation...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Larval development; Reproductive sucess; Plant phenology; Plutella xylostella; Lepidoptera.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000400019
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Photoperiodism and seasonality in neotropical population of Plutella xylostella L. (Lepidoptera: Yponomeutidae) Neotropical Entomology
Campos,Wellington G..
Neotropical populations of the diamondback moth Plutella xylostella L. have seasonal cycles of growth and decrease, and moth migration plays a fundamental role in generating such population dynamics. Since the oscillation of these populations is predictable, photoperiod might operate as a signal that triggers the migratory behaviour of the insect. Migration in insects is usually preceded by reproductive diapause, a photoperiodic response that can be characterised by morphological, physiological and behavioural alterations that permit to discriminate between migratory and non-migratory forms. In this study, I tested whether the pre-imaginal and reproductive development of P. xylostella from Minas Gerais (Brazil) is affected by artificial day-lengths that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Day-length; Diapause; Migration; Photoperiod; Population dynamics.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000400003
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Comparação da eficiência de modelos de armadilhas de interceptação de vôo na amostragem de Hymenoptera e outros insetos Anais da SEB
Campos,Wellington G.; Pereira,Débora B.S.; Schoereder,José H..
Armadilhas de interceptação de vôo para insetos propostas por Townes (1972) e Masner & Goulet (1981) foram modificadas. Os modelos originais e os modificados foram comparados entre si em sua eficiência na amostragem de ordens de Insecta e famílias de Hymenoptera. O uso de bandejas pintadas na cor amarela aumentou significativamente a eficiência de captura das armadilhas de Masner & Goulet. A união, em uma única armadilha, da bandeja amarela, típica do modelo de Masner & Goulet, com o pote, típico das armadilhas Malaise, não reduziu a eficiência individual dos dois sistemas. A associação desses sistemas de captura por interceptação de vôo, mais a atratividade da cor amarela, permitiu o funcionamento, num mesmo local e ao mesmo tempo,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Armadilha Malaise; Parasitóides; Metodologia amostral; Levantamento faunístico.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80592000000300001
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Induced response against herbivory by chemical information transfer between plants Braz. J. Plant Physiol.
Campos,Wellington G.; Faria,Ana P.; Oliveira,Maria Goreti A.; Santos,Hérica L..
Plants respond to herbivores and pathogens attack with increased emission of volatile organic compounds. These molecules act as indirect defences when attracting natural enemies of herbivores and thus benefit the plant. It remains controversial whether undamaged plants capture chemicals released by damaged neighbouring plants and respond to them by increasing their defensive barriers against an imminent attack. In spite of public appeal and of this being the 25th year of the Talking Trees Hypothesis, only recently have the most sceptical scientists been convinced. The induced response to herbivory by interplant information transfer has been found in two plant-herbivore systems. However, the universality of the phenomenon and its ecological and evolutionary...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Induced resistance; Induced defense; Insect-plant interaction; Interplant air signalling; Interplant communication; Talking tress.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000400001
Registros recuperados: 4
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