|
|
|
| Registros recuperados: 33 | |
|
|
| 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 |
| |
|
|
| Hameed,Saima; Hameed,Shahid; Sadia,Munazza; Malik,Salman A. |
| Background: The Bemisia tabaci is one of the most devastating pests of agricultural crops and ornamental plants worldwide. The genetic diversity and biotype status of the Bemisia tabaci in Pakistan was assessed by using random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR). A total 80 samples of B. tabaci collected from 14 districts of the Punjab province and 7 districts of the Sindh province were included. Results: All 10 primers screened in this study generated 151 scorable amplification products, of which 117 or 77% were polymorphic. Pairwise Nei and Lis similarity had ranged from 0.25 to 0.88 among all individuals analyzed. Based on Nei and Lis similarity coefficients Bemisia populations were grouped into 3 main clusters and clearly... |
| Tipo: Journal article |
Palavras-chave: Asia II 1; Genetic diversity; UPGMA; Whitefly. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000600006 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| Oliveira,Maria R.V. de; Amancio,Everton; Laumann,Raúl A.; Gomes,Liziane de O.. |
| A survey was conducted in Brasília, DF, from January 1999 to March 2001, on tobacco, cotton, tomato, cabbage, soybean, bean, melon, eggplant and the weed Emilia sonchifolia DC, to collect natural enemies of the whiteflies Bemisia tabaci (Gennadius) and Trialeurodes vaporariorum (Westwood). Fourteen predators, twelve parasitoids and two hyperparasitoids were collected. Among the parasitoids, Encarsia inaron (Walker) is recorded for the first time in South America, and E. basicincta Gahan is a new record for Brazil. E. aleurothrixi Evans & Polaszek is recorded for the first time parasitizing B. tabaci. The lady beetles Nephaspis hydra Gordon and Delphastus davidsoni Gordon are registered for the first time preying on B. tabaci. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Whitefly; Parasitoid; Predator; Hyperparasitoid. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000100023 |
| |
|
|
| Oriani,Maria A de G; Vendramim,José D. |
| Brazil is one of the world's largest tomato producer, but considerable part of the production is lost due to the attack of Bemisia tabaci (Genn.) B biotype. Resistant germoplasm plants can be an important method for B. tabaci control in integrated pest management approaches. The attractiveness and ovipositional preference of B. tabaci for 17 tomato genotypes were evaluated in a free-choice test. Trials were set up in a randomized block design with ten replicates. Each replicate (one tomato plant per pot) was placed in a cage (80 x 50 x 50 cm) and infested with 1,000 adults during four days. Linear correlation tests were applied between the number of insects and eggs and number of trichomes in each tomato genotype. LA716, LA444-1 and PI134418 genotypes were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Whitefly; Solanum lycopersicum; Antixenosis. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000600024 |
| |
|
|
| 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 |
| |
|
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| Pinheiro,Patricia Valle; Quintela,Eliane Dias; Oliveira,Jaison Pereira de; Seraphin,José Carlos. |
| The objective of this work was to determine the most susceptible nymphal stage of Bemisia tabaci biotype B to neem (Azadirachta indica A. Juss.) oil applied to dry bean (Phaseolus vulgaris L.) in a screenhouse. A solution of commercial oil (Dalneem) extracted from neem seeds was sprayed directly on each nymphal instar at 0, 0.1, 0.25, 0.5, 1 and 2% concentrations for lethal concentration (LC) determination, and at 0, 0.5 and 1% concentrations for lethal time (LT) determination. The number of living and dead nymphs was recorded five days after spraying for LC determination, and daily during six days for LT determination. The LC50 estimated for fourth instar nymphs occurred at 0.56% concentration. For all instars, LC50 and LC95 were estimated at 0.32 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Azadirachta indica; Phaseolus vulgaris; Immature stages; Lethal concentration; Whitefly. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000400004 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
| Registros recuperados: 33 | |
|
|
|
