Consulta: creatorFacets:"Lopes-da-Silva,Marcelo"
Registros recuperados: 11
Data/hora: 09/06/2024 04:43:55

Parasitismo de pupas de Argon lota Hewitson (Lepidoptera: Hesperiidae) por Brachymeria pandora (Crawford) (Hymenoptera: Chalcididae) no Rio Grande do Sul
Provedor de dados: 82
Autores: Salgado-Neto,Geraldo; Di Mare,Rocco A; Lopes-da-Silva,Marcelo.
This note reports the first record of parasitism of Argon lota Hewitson pupae by the facultative gregarious parasitoid Brachymeria pandora (Crawford). Up to six adults (three males and three females) of B. pandora were observed to emerge from a single A. lota pupa.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Natural enemy; Biological control; Palm tree pest; Parasitoid wasp.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000200027

Color polymorphism and allele frequency in a Brazilian population of the sunflower caterpillar Chlosyne lacinia saundersi (Doubleday) (Lepidoptera: Nymphalidae)
Provedor de dados: 82
Autores: Lopes-da-Silva,Marcelo; Casagrande,Mirna M.
The aim of this work was at calculating allele frequency color polymorphism in a population of sunflower caterpillar, Chlosyne lacinia saundersi (Doubleday) from Londrina, Paraná State, Brazil. Allele frequency in insect populations can be used as genetic marker to compare populations from different geographical and host origins. There are three phenotypes conditioned by two loci interacting epistatically. The phenotypes are: rufa (oranged colored larvae), bicolor (black larvae with dorsal orange stripes) and nigra, larvae with the body entirely black, sometimes with dorsal yellow dots, best seen in the fourth and fifth instars. Samples were taken independently in an attempt to obtain all combinations of crossing among genotypes. The genetic mechanism of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Epistasis; Population genetics; Ecological genetics; Phenotype.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000100025

Characterization and genetic relationships among Brazilian biotypes of Schizaphis graminum (Rondani) (Hemiptera: Aphididae) using RAPD markers
Provedor de dados: 82
Autores: Lopes-da-Silva,Marcelo; Tonet,Gabriela E.L.; Vieira,Luiz G.E.
The greenbug Schizaphis graminum (Rondani) is one of the most important cereals pests in the world. Within populations of this species, several biotypes, which are clones that share same virulence relationships with cultivated plants, can be distinguished. Molecular markers have been used to genetically characterize insect populations because they are fast and cost effective. In order to find RAPD markers to identify Brazilian S. graminum biotypes, nineteen clonal populations of three biotypes (B, C and E) from Brazil and three clonal populations from the U.S. were examined. Eighteen primers were used to analyze the material, but only six primers revealed polymorphisms and among those, three produced diagnostic band profiles that allowed biotype...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic variability; Molecular marker; Greenbug; Insect-plant relationship.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000100009

The drosophilid fauna (Diptera, Drosophilidae) of the transition between the Pampa and Atlantic Forest Biomes in the state of Rio Grande do Sul, southern Brazil: first records
Provedor de dados: 84
Autores: Hochmüller,Cleverton J.C.; Lopes-da-Silva,Marcelo; Valente,Vera L.S.; Schmitz,Hermes J.
Although studies on drosophilid (Diptera, Drosophilidae) assemblages have become relatively abundant in the past decades, many environments remain to be searched. The present study investigates the composition, the species abundances and the richness of the drosophilid assemblages in two localities of the municipality of Cruz Alta, northwestern region of the state of Rio Grande do Sul, a point of contact between the biomes Atlantic Forest and Pampa: (i) an urban area (2007), constituted by a domestic orchard with Citrus trees, and (ii) a forested area, in Centro de Educação, Pesquisa e Proteção Ambiental - CEPPA (2008/2009), of Universidade de Cruz Alta, located in a fragment of riparian forest. Collections were conducted using fermented banana-baited...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drosophila; Insecta; New records; Neotropical region; Species abundances.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492010001900001

Interceptações de pragas quarentenárias e ausentes não regulamentadas em material vegetal importado
Provedor de dados: 86
Autores: Lopes-da-Silva,Marcelo; Benito,Norton Polo; Sanches,Marcio Martinello; Marques,Abi Soares dos Anjos; Návia,Denise; Gonzaga,Vilmar; Mendes,Marta Aguiar Sabo; Martins,Olinda Maria; Urben,Arailde Fontes; Fernandes,Fernanda Rausch.
Resumo: O objetivo deste trabalho foi avaliar as informações qualitativas e quantitativas sobre as interceptações de pragas ausentes não regulamentadas e quarentenárias em material vegetal importado. As informações sobre interceptações de pragas pelo serviço de quarentena vegetal da Embrapa, no período de 1977 a 2013, foram obtidas em um banco de dados, atas laboratoriais e listas de interceptação publicadas. As interceptações foram analisadas de acordo com regulamentação das pragas, espécie vegetal, parte vegetal importada e origem. O material foi categorizado em sementes botânicas e material de propagação vegetativa. No período do levantamento, foram interceptadas 75 espécies de pragas em 114 eventos de interceptação. Fungos, vírus e ácaros constituem a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Defesa fitossanitária; Intercâmbio de germoplasma; Patologia de sementes; Quarentena de pós-entrada; Sanidade de material de propagação vegetativa; Sanidade vegetal.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000500494

Fundamentos biológicos, ferramentas operacionais e inovação em quarentena vegetal
Provedor de dados: 86
Autores: Marques,Abi Soares dos Anjos; Lopes-da-Silva,Marcelo; Gonzaga,Vilmar; Fernandes,Fernanda Rausch; Benito,Norton Polo; Veiga,Renato Ferraz de Arruda.
Resumo: A demanda por segurança alimentar e nutricional delimita modelos de intensificação da agricultura em que a prevenção de perdas na produção é essencial. O cenário de agricultura globalizada, o aumento das rotas de comércio e o deslocamento de pessoas e produtos maximiza o potencial de introduções inadvertidas de pragas em áreas indenes, colocando em risco os sistemas produtivos. A quarentena vegetal é apresentada como medida disciplinadora à movimentação de vegetais, para limitar a dispersão de pragas agrícolas. A vigilância preconiza a antecipação e reconhece a ameaça, privilegiando a acurácia e a eficiência do diagnóstico, a consolidação de metodologias de análise de risco de pragas e a evolução das ferramentas operacionais. Com apropriação de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Defesa fitossanitária; Intercâmbio de germoplasma vegetal; Pragas agrícolas; Quarentena; Segurança alimentar.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000500483

Potential spread and economic impact of invasive Drosophila suzukii in Brazil
Provedor de dados: 86
Autores: Benito,Norton Polo; Lopes-da-Silva,Marcelo; Santos,Régis Sivori Silva dos.
Abstract: The objective of this work was to outline the potential distribution and economic impact of Drosophila suzukii (Diptera: Drosophilidae), a recent invasive pest, in Brazil. Two maps of the potential establishment of the species were drawn based on the ecoclimatic index (EI), which uses the following thermal requirements for the species: with thermal stress, most restrictive scenario for spread; and without thermal stress. The EI was classified into four ranges: unfavorable, ≤25%; less favorable, &gt;25 to ≤50%; favorable, &gt;50 to ≤75%; and highly favorable, &gt;75%. Economic losses were estimated based on the most restrictive map. The highly favorable areas were overlapped with those of the maps of production data for each possible host (apple,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adaptation; Biogeography bioinvasion exotic species spotted wing drosophila.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000500571

First report of parasitism on pupae of Opsiphanes invirae amplificatus Stichel (Lepidoptera, Nymphalidae) by Conura (Conura) maculata (Fabricius) (Hymenoptera, Chalcididae) in Rio Grande do Sul, Brazil
Provedor de dados: 92
Autores: Salgado-Neto,Geraldo; Lopes-da-Silva,Marcelo.
First report of parasitism on pupae of Opsiphanes invirae amplificatus Stichel (Lepidoptera, Nymphalidae) by Conura (Conura) maculata (Fabricius) (Hymenoptera, Chalcididae) in Rio Grande do Sul, Brazil. This scientific note records the parasitism on pupae of Opsiphanes invirae amplificatus Stichel (1904) by Conura (Conura) maculata (Fabricius). This is a report of this interaction in the subtropical region of South America and the first report of the occurrence of this parasitoid in the state of Rio Grande do Sul, Brazil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological control; Natural enemy; Palms; Parasitoids wasps.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000200023

Infestation and natural parasitism of aphids in single and mixed pastures of black oats and ryegrass
Provedor de dados: 92
Autores: Sturza,Vinícius Soares; Poncio,Sônia; Santos,Aline Bosak dos; Lopes-da-Silva,Marcelo.
Some species of aphids are major pests on cereal crops and grass pastures. Usually these pests are not adequately controlled in pasture lands that become sources of aphid infestations to cereal crops. The dynamics of aphids and the incidence of natural enemies are less known in pasture systems than in cereal fields. The objective of this work was to assess the aphid infestation and natural aphid parasitism in different pasture composition. Three hypotheses were tested: 1- the aphid species composition in pastures may vary according to the cereal species in the field; 2- the mixture of two plant species can modify the amount and diversity of aphids; 3- the plant species composition of pasture fields influences the parasitism of aphids. Empirical data were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aphididae; Avena strigosa L.; Cereal crops; Lolium multiflorum L; Natural parasitism.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000300015

Analysis of the genetic diversity in Metopolophium dirhodum (Walker) (Hemiptera, Aphididae) by RAPD markers
Provedor de dados: 92
Autores: Lopes-da-Silva,Marcelo; Vieira,Luiz Gonzaga Esteves.
The emergence of host-races within aphids may constitute an obstacle to pest management by means of plant resistance. There are examples of host-races within cereals aphids, but their occurrence in Rose Grain Aphid, Metopolophium dirhodum (Walker, 1849), has not been reported yet. In this work, RAPD markers were used to assess effects of the hosts and geographic distance on the genetic diversity of M. dirhodum lineages. Twenty-three clones were collected on oats and wheat in twelve localitites of southern Brazil. From twenty-seven primers tested, only four primers showed polymorphisms. Fourteen different genotypes were revealed by cluster analysis. Five genotypes were collected only on wheat; seven only on oats and two were collected in both hosts. Genetic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rose-Grain Aphid; Genetic diversity; Host-races; Insect-plant relationships.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262007000100009

Temporal genotypic diversity of Schizaphis graminum (Rondani 1852) (Hemiptera: Aphididae) in a black oats (Avena strigosa) field
Provedor de dados: 52
Autores: Lopes-da-Silva,Marcelo; Vieira,Luiz Gonzaga Esteves.
The aim of this work was to analyze the clonal diversity variation in Schizaphis graminum during a complete phenological cycle of black oats (Avena strigosa). RAPD markers were used for detection of DNA polymorphisms of each clonal lineage, derived from a single clone collected weekly during a period of four months, in a crop field of black oats, Londrina, Paraná, Brazil. The monthly genotypic diversity was estimated by Shannon Information Index (H). Only four genotypes were distinguished from 122 specimens, with one of them overly predominant in all sampling dates (&gt;60%). Another genotype, apparently a later colonizer, rapidly reached greater frequency than other genotypes on the second and third month. The results of this work suggested that temporal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic diversity; RAPD; Temporal scale.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400021