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| Registros recuperados: 33 | |
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| Inoue-Nagata,Alice K; Lima,Mirtes F; Gilbertson,Robert L. |
| ABSTRACT: Insect-transmitted viruses cause some of the most damaging and economically important diseases of crop plants, especially in tropical and subtropical regions. The geminiviruses, a group of single-stranded DNA viruses with unique twined icosahedral virus particles, are responsible for many of these diseases. Of particular importance are the geminiviruses transmitted by whiteflies (Bemisia tabaci), which are in the genus Begomovirus. This is the largest genus of plant viruses (in terms of number of species), and some are responsible for many devastating diseases in vegetable and fiber crops throughout the world. This review presents the current understanding of begomoviruses, the diseases they cause, and approaches for disease management. An... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Begomovirus; Golden mosaic; Integrated pest management; Whitefly; Bemisia tabaci.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000100008 |
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| Oriani,Maria A. de G.; Lara,Fernando M.. |
| The biology of Bemisia tabaci biotype B (Genn.) on bean (Phaseolus vulgaris L.) genotypes containing arcelin in the seeds was evaluated. Also, biochemical screening of seeds and leaves material of these genotypes were carried out in order to verify if traces of arcelin could be found in its leaves. The tests were conducted under greenhouse conditions, in the dry and wet seasons, with the following genotypes: ARC 3s, ARC 5s (wild genotypes containing arcelin in the seeds); ARC 1, ARC 2, ARC 3, ARC 4 (near isogenic lines containing arcelin in the seeds - EMBRAPA) and Porrillo 70, Bolinha, IAPAR MD 808 (commercial genotypes without arcelin). The wild genotypes, ARC 3s and ARC 5s, showed high levels of antibiosis resistance type, mainly for ARC 5s which... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Phaseolus vulgaris; Whitefly; Biology; Host plant resistance. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80592000000300020 |
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| Campuzano Martínez, Xochitl Aidee. |
| En dos poblaciones de campo de Bemisia tabaci (Gennadius) biotipo B cuyas generaciones anteriores habían sido seleccionadas con el insecticida neonicotinoide thiamethoxam (NEO-R y NEO-N) y una susceptible a insecticidas (SUSC) se determinó el nivel de respuesta al insecticida thiamethoxam, así como las tablas de vida y fertilidad. A nivel de CL95, la población NEO-R tuvo una proporción de resistencia (PR95) a thiamethoxam de 8.8× y una tasa intrínseca de incremento (rm) de 0.072. La aptitud biológica de las poblaciones NEO-R, NEO-N en relación a la SUSC fue de 1.75 y 2.0, respectivamente. La población NEO-N tuvo una PR95 de 1.9× y una rm de 0.082, mientras que en SUSC, este valor fue de 0.041. El huevo y el adulto tardaron más tiempo en desarrollarse en la... |
| Tipo: Tesis |
Palavras-chave: Neonicotinoides; Tablas de vida; Tablas de fertilidad; Mosca blanca; Maestría; Entomología y Acarología; Life tables; Fertility tables; Whitefly. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1547 |
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| Carabalí,Arturo; Belloti,Anthony C; Montoya-Lerma,James. |
| Bemisia tabaci (Gennadius) is one of the most important pests of cassava in Africa and several countries of Asia due to the damage caused by direct feeding, the excretion of honeydew, and its capacity as a vector of cassava mosaic geminivirus. There is a general consensus that B. tabaci is a complex of morphologically indistinguishable populations with different biotypes. In the Americas, the polyphagous biotype B does not appear to feed on cassava. Recent studies indicate that it is possible, however, for biotype B to gradually adapt to cassava using phylogenetically related hosts. Therefore, the possibility that some wild species of cassava constitute intermediate hosts in the adaptation process may lead to the establishment of biotype B on commercial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adaptation; Trophic relationship; Whitefly. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000400015 |
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| Calegario,Renata Faier; Ferreira,Sávio de Siqueira; Andrade,Eduardo Chumbinho de; Zerbini,Francisco Murilo. |
| The objective of this work was the biological and molecular characterization of a begomovirus detected in São Joaquim de Bicas, Minas Gerais, Brazil, named TGV-[Bi2], by determining its host range, complete nucleotide sequence and phylogenetic relationships with other begomoviruses. Biological characterization consisted of a host range study using either sap inoculation or particle bombardment as inoculation methods. The yellow spot virus can infect plants in Solanaceae and Amaranthaceae, including economically importat crops as sweet pepper, and weeds as Datura stramonium and Nicotiana silvestris. For the molecular characterization, the full-length genome (DNA-A and DNA-B) was amplified, cloned and completely sequenced. Sequence comparisons and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon esculentum; Bemisia tabaci; ToYSV; Molecular biology; Geminivirus; Whitefly. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000900016 |
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| Campos,Ostenildo R.; Crocomo,Wilson B.; Labinas,Adriana M.. |
| With the development of greenhouse grown crops, the whitefly Trialeurodes vaporariorum (West.) has become an important pest. Aiming at verifying the effect of host on the development of this species, the biology of the whitefly was studied on bean (Phaseolus vulgaris L.) cultivars IAC-Carioca Pyatã, IAPAR-57, Jalo Precoce, IAC-Bico de Ouro, IAC-Maravilha and on soybean (Glycine max L.) cultivar Cristalina. The study was conducted at the Laboratório de Entomologia Agrícola - FCA-UNESP, at 25 ± 3°C temperature, 80 ± 10% RH and 14h photophase. The biological parameters assessed were duration, viability and number of nymphal instars; male and female longevity, oviposition period, number of eggs per female and sex ratio; egg viability and incubation period and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Whitefly; Life table; Insect/plant relationship. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000100020 |
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| Almeida,Álvaro M. R.; Piuga,Fernanda F.; Marin,Silvana R.R.; Kitajima,Elliot W.; Gaspar,José O.; Oliveira,Thalita G. de; Moraes,Tanara G. de. |
| Stunting and stem necrosis were noticed in soybeans (Glycine max) grown in 2000/2001 in West Central Brazil the same condition was also observed in the following year in plantations as far as 2,000 km from the initial area. Based on transmission (mechanical, graft, insect vector), purification and serology, electron microscopy and molecular studies the causal agent was determined to be a whitefly-borne carlavirus which is possibly related to Cowpea mild mottle virus (CpMMV). |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cowpea mild mottle virus; Whitefly; Bemisia tabaci biotype B.. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000200016 |
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| Marilene,Fancelli; Vendramim,José Djair. |
| Whiteflies are phytophagous insects, whose nymphs and adults suck the phloem sap, causing direct damage due to host plant weakness. In tomato (Lycopersicon spp.) crops, they are important vectors of limiting fitoviruses. The objective of this study was to determine the effects of Lycopersicon spp. genotypes on Bemisia tabaci (Gennadius, 1889) biotype B development under greenhouse conditions. The evaluated genotypes were LA462 (L. peruvianum), LA716 (L. pennellii), LA1584 (L. pimpinellifolium), LA1609 (L. peruvianum), LA1739 (L. hirsutum), P25 (L. esculentum), PI134417 (L. hirsutum f. glabratum) and Santa Clara (L. esculentum). LA716 was non-preferred for oviposition by the whitefly, which suggests an antixenotic effect. LA1584 showed an antibiotic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bemisia argentifolii; Aleyrodidae; Whitefly; Biology; Tomato. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400007 |
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| Rabello,Aline R.; Queiroz,Paulo R.; Simões,Kenya C.C.; Hiragi,Cássia O.; Lima,Luzia H.C.; Oliveira,Maria Regina V.; Mehta,Angela. |
| The Bemisia tabaci complex is formed by approximately 41 biotypes, two of which (B and BR) occur in Brazil. In this work we aimed at obtaining genetic markers to assess the genetic diversity of the different biotypes. In order to do that we analyzed Bemisia tabaci biotypes B, BR, Q and Cassava using molecular techniques including RAPD, PCR-RFLP and sequencing of the ITS1 rDNA region. The analyses revealed a high similarity between the individuals of the B and Q biotypes, which could be distinguished from the BR individuals. A phylogenetic tree based on ITS1 rDNA sequence was constructed. This is the first report of the ITS1 rDNA sequence of Bemisia tuberculata and of the BR biotype of B. tabaci. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Whitefly; ITS rDNA; Genetic diversity; Phylogenetic analysis. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000300029 |
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| Rudi, Nderim; Norton, George W.; Alwang, Jeffrey Roger; Asumugha, Godwin N.. |
| Marker-assisted breeding could have a major impact in relieving productivity constraints that cannot as easily or rapidly be relieved by conventional breeding alone. This paper estimates the benefits of using marker-assisted breeding, as compared to conventional breeding alone, in developing cassava varieties resistant to cassava mosaic disease, green mite, whitefly and post-harvest physiological deterioration in Nigeria, Ghana and Uganda. Marker-assisted breeding is estimated to save at least four years in the breeding cycle for varieties resistant to the pests and to result in incremental net benefits over 25 years in the range of $34 to $800 million depending on the country, the particular constraint and various assumptions. Benefits may reach as high... |
| Tipo: Journal Article |
Palavras-chave: Marker-assisted breeding; Impact assessment; Cassava; Green mite; Whitefly; Cassava mosaic disease; Post-harvest physiological deterioration; Crop Production/Industries. |
| Ano: 2010 |
URL: http://purl.umn.edu/93862 |
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| Rodrigues,Gisele Brito; Rocha Sobrinho,Geraldo Gomes; Mituti,Tatiana; Bergamin Filho,Armando; Amorim,Lilian; Rezende,Jorge Alberto Marques; Novaes,Quelmo Silva de. |
| ABSTRACT: Severe mosaic symptoms, accompanied by yellow spots, abnormally small leaves, fruit malformation and cracking, reduced plant growth, and high levels of whitefly (Bemisia tabaci MEAM1) infestation were observed in passionflower (Passiflora edulis) orchards in southwestern Bahia, Brazil. The aim of this work was to identify the species of begomovirus infecting the passionflowers, its prevalence in southwestern Bahia, and the spatial and temporal dynamics of the disease. Leaf samples from symptomatic plants collected at 57 orchards located in ten counties were evaluated by PCR for begomovirus infection. Complete nucleotide sequences of DNA-A for two isolates revealed 97 % identity with Passionfruit severe leaf distortion virus (PSLDV). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bemisia tabaci; Geminiviridae; Passifloraceae; Whitefly. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400337 |
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| Leite,Germano Leão Demolin; Picanço,Marcelo; Guedes,Raul Narciso Carvalho; Ecole,Carvalho Carlos. |
| The objective of this work was to determine the effects of rainfall, temperature, predators, parasitoids, plant age, leaf chemical composition, levels of leaf nitrogen and potassium, besides density of leaf trichomes, on attack intensity of Bemisia tabaci biotype B on the Cucumis sativus. An increase in the number of whitefly adults and nymphs per leaf was observed with plant aging. A higher number of whitefly adults per leaf and eggs cm-2 was verified in the apical part than in the middle and bottom part of the plants canopy. However, the higher number of whitefly nymphs was observed in the mid-part than in the apical and bottom part of the plant canopy. The incidence of whitefly nymphs was negatively affected with foliar nitrogen. Pentacosane and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis sativus; Whitefly; Allelochemicals; Nitrogen; Trichomes. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000800005 |
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| Registros recuperados: 33 | |
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