scholarly journals Oviposition preference of Bemisia tabaci (Genn.) biotype B (Homoptera: Aleyrodidae) for bean genotypes containing arcelin in the seeds

2000 ◽  
Vol 29 (3) ◽  
pp. 565-572 ◽  
Author(s):  
Maria A. de G. Oriani ◽  
Fernando M. Lara
Keyword(s):  
Phaseolus Vulgaris ◽  
Bemisia Tabaci ◽  
Free Choice ◽  
Oviposition Preference ◽  
Near Isogenic Lines ◽  
Phaseolus Vulgaris L ◽  
Isogenic Lines ◽  
Biotype B ◽  
Bemisia Tabaci Biotype B

The oviposition preference of Bemisia tabaci biotype B (Homoptera: Aleyrodidae) for bean (Phaseolus vulgaris L.) genotypes containing arcelin in the seeds was evaluated. The tests were carried out 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). In the free choice and no-choice oviposition tests, Bolinha and Porrillo 70 genotypes were preferred for oviposition by that insect. The Bolinha susceptibility could be related to the great number of acicular trichomes presents on its leaves surface. The wild genotypes, ARC 5s and ARC 3s, showed oviposition nonpreference resistance type. This resistance is not related to the arcelin variants, since the bred genotypes also contain arcelin in its seeds and did not show resistance to B. tabaci, biotype B.

scholarly journals Antibiosis effects of wild bean lines containing arcelin on Bemisia tabaci (Genn.) biotype B (Homoptera: Aleyrodidae)

2000 ◽  
Vol 29 (3) ◽  
pp. 573-582 ◽  
Author(s):  
Maria A. de G. Oriani ◽  
Fernando M. Lara
Keyword(s):  
Bemisia Tabaci ◽  
Development Time ◽  
Mortality Rates ◽  
Near Isogenic Lines ◽  
Biochemical Screening ◽  
Phaseolus Vulgaris L ◽  
Wild Genotype ◽  
Biotype B ◽  
Antibiosis Resistance ◽  
Bemisia Tabaci Biotype B

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 presented the highest nymphs mortality rates, approximately 90%. Also, the longest development time for nymphs fed on ARC 5s genotype suggest antibiosis and/or feeding nonpreference resistance type. The wild genotype resistance is not related with arcelin presence in the seeds, since no trace of this protein was found in its leaves.

scholarly journals Resistance of potato genotypes (Solanum spp.) to Bemisia tabaci biotype B

2008 ◽  
Vol 26 (2) ◽  
pp. 221-226 ◽  
Author(s):  
Márcia S Silva ◽  
André L Lourenção ◽  
José Alberto C de Souza-Dias ◽  
Hilário da S Miranda Filho ◽  
Valdir J Ramos ◽  
...  
Keyword(s):  
Free Choice ◽  
Oviposition Preference ◽  
Resistance Mechanism ◽  
Statistical Design ◽  
Adult Emergence ◽  
Choice Test ◽  
Choice Preference ◽  
Randomized Design ◽  
Biotype B ◽  
Bemisia Tabaci Biotype B

The resistance of 24 potato genotypes to B. tabaci (Genn.) biotype B (Hemiptera: Aleyrodidae) was evaluated in five greenhouse experiments. The first experiment we evaluated the attractiveness and preference for oviposition in a free-choice test (randomized blocks, 24 treatments, and eight replications). In two other experiments we evaluated no-choice preference for oviposition (randomized blocks, six treatments, and ten replications). The whitefly egg-adult cycle was monitored using a statistical design in randomized blocks with five replications. Trichome density was evaluated in an experiment with 24 treatments and six replications, in a completely randomized design. In the free-choice test, potato genotypes NYL 235-4 and IAC-1966 were the most attractive to adults, while cultivars Achat, Aracy Ruiva, and Monte Bonito presented the lowest number of adults. Also in this assay, cultivars Achat, Ibituaçu, Panda, IAC-1966, and Agata presented the lowest number of eggs, while in the no-choice test, only cultivar Achat and IAC-1966 remained resistant. Consequently, for these two genotypes non-preference is the oviposition resistance mechanism. The egg-adult cycle varied from 21 days (cultivar Panda) to 22.5 days (clones IAC-1966 and NYL 235-4). The adult emergence varied from 91.2% (clone IAC-1966) to 99.3% (cultivar Ibituaçu). Clone NYL 235-4 had the greatest number of simple (ST) and glandular (GT) trichomes; while clone IAC-1966 had the lowest number of ST and, clone IAC-6290, of GT. There were significant correlations between adult attractiveness and oviposition preference; between oviposition preference and ST density; and between oviposition preference and GT density. Considering all characteristics, cultivar Achat was the most resistant to B. tabaci biotype B among all potato genotypes studied, while clone NYL 235-4 proved (past tense) to be susceptible.

scholarly journals Dinâmica Populacional de Mosca-Branca Bemisia tabaci (Genn.) Biótipo B (Hemiptera: Aleyrodidae) em Feijoeiro

2014 ◽  
Vol 7 (1) ◽  
pp. 05-11
Author(s):  
Anderson Gonçalves da Silva ◽  
Arlindo Leal Boiça Junior ◽  
Paulo Roberto Silva Farias ◽  
Bruno Henrique Sardinha de Souza ◽  
Nara Elisa Lobato Rodrigues ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Phaseolus Vulgaris ◽  
Relative Humidity ◽  
Bemisia Tabaci ◽  
Abiotic Factors ◽  
Phaseolus Vulgaris L ◽  
Bean Plants ◽  
Sowing Season ◽  
Set Up ◽  
Biotype B

O objetivo do presente estudo foi avaliar a influência dos fatores abióticos na dinâmica populacional da mosca-branca Bemisia tabaci (Genn.,) (Hemiptera: Aleyrodidae) em três épocas de semeadura de feijoeiro (Phaseolus vulgaris L.). Os ensaios foram instalados de junho de 2010 a abril de 2012, todos conduzidos no Departamento de Fitossanidade da FCAV/UNESP – Campus de Jaboticabal, SP. Os estudos de dinâmica populacional de B. tabaci biótipo B, foram obtidos através da avaliação semanal da infestação de ovos, ninfas e adultos de mosca-branca por 18 avaliações, sendo seis para cada época de semeadura: “de inverno”, “das águas” e “da seca”, respectivamente, além da influência dos fatores abióticos, temperatura e umidade relativa (mínima, média e máxima) semanal e precipitação pluviométrica acumulada, sendo essas variáveis correlacionadas com o número total de ovos, ninfas e adultos de mosca-branca através de uma análise do tipo correlação linear de Pearson (r). Dentre os resultados obtidos, destaca-se que os picos populacionais de B. tabaci biótipo B ocorreram na semeadura “das águas”, seguido pelas semeaduras “de inverno” e “da seca” e que os fatores abióticos temperatura e umidade relativa influenciaram negativamente na dinâmica populacional de mosca-branca. Population Dynamics of the Whitefly Bemisia tabaci (Genn.) Biotype B (Hemiptera: Aleyrodidae) on Bean Plants Abstract. This study aimed to evaluate the influence of abiotic factors on the population dynamics of the whitefly Bemisia tabaci (Genn.,) (Hemiptera: Aleyrodidae) in three sowing seasons on bean plants (Phaseolus vulgaris L.). The assays were set up from June 2010 to April 2012 and conducted in the Departamento de Fitossanidade at FCAV/UNESP – Campus of Jaboticabal, SP. The studies of the population dynamics of B. tabaci biotype B were performed weekly through infestation assessments of eggs, nymphs and adults of the whitefly on 18 samplings, six for each sowing season: “winter”, “water” and “dry”, in addition to the influence of the abiotic factors weekly temperature and relative humidity (minimum, average and maximum) and accumulated rainfall. These variables were correlated to the total number of eggs, nymphs and adults of the whitefly through Pearson’s linear correlation analysis. Among the obtained results, the population peaks of B. tabaci biotype B occurred at the “water” season, followed by “winter” and “dry” seasons, and the abiotic factors temperature and relative humidity influenced negatively the population dynamics of the whitefly.

scholarly journals Toxicity of neem oil to Bemisia tabaci biotype B nymphs reared on dry bean

2009 ◽  
Vol 44 (4) ◽  
pp. 354-360 ◽  
Author(s):  
Patricia Valle Pinheiro ◽  
Eliane Dias Quintela ◽  
Jaison Pereira de Oliveira ◽  
José Carlos Seraphin
Keyword(s):  
Bemisia Tabaci ◽  
Neem Oil ◽  
Nymphal Instar ◽  
Phaseolus Vulgaris L ◽  
Dry Bean ◽  
Nymphal Stage ◽  
Lethal Time ◽  
Biotype B ◽  
Bemisia Tabaci Biotype B ◽  
Commercial Oil

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 2.78% concentrations, respectively. The estimated values of LT50 at 1% concentration were 2.46, 4.45, 3.02 and 6.98 days for the first to fourth instars, respectively. The LT50 occurred at five days for 0.5% and at four days for 1% concentration in all instars. A mortality rate of over 80% was observed on the 6th day for the first to third instars at 1% concentration. The first three nymphal stages were more susceptible to neem oil when compared to the fourth nymphal stage.

Toxicity of non-ionic surfactants and interactions with fungal entomopathogens toward Bemisia tabaci biotype B

BioControl ◽  
2013 ◽  
Vol 59 (1) ◽  
pp. 111-123 ◽  
Author(s):  
Gabriel Moura Mascarin ◽  
Nilce Naomi Kobori ◽  
Eliane Dias Quintela ◽  
Steven Paul Arthurs ◽  
Ítalo Delalibera Júnior
Keyword(s):  
Bemisia Tabaci ◽  
Ionic Surfactants ◽  
Fungal Entomopathogens ◽  
Biotype B ◽  
Bemisia Tabaci Biotype B

scholarly journals Mortality of Bemisia tabaci biotype B (sternorrhyncha: aleyrodidae) adults by aliphatic and aromatic synthetic sucrose esters

2008 ◽  
Vol 51 (6) ◽  
pp. 1115-1119 ◽  
Author(s):  
Mariangela Alves ◽  
Maurício Boscolo ◽  
Odair Aparecido Fernandes ◽  
Maria Andréia Nunes
Keyword(s):  
Bemisia Tabaci ◽  
Chemical Control ◽  
Control Method ◽  
Sucrose Esters ◽  
Sodium Dodecylsulphate ◽  
Insecticidal Effect ◽  
Spray Tower ◽  
Sucrose Polyesters ◽  
Biotype B ◽  
Bemisia Tabaci Biotype B

The B-strain of Bemisia tabaci Gennadius is a key pest of several crops and chemical control is the main control method used by growers, although reduction in efficacy due to insecticide resistance has already been reported. The aim of this work was to investigate the insecticidal effect of an array of synthetic sucrose esters with the aliphatic and aromatic groups on whitefly adults. Sucrose butyrate, caprate, octanoate, palmitate, oleate, octaacetate, phthalate, benzoate, and sucrose diacetate hexaisobutyrate were tested. The solutions were prepared and applied on the adults caught on yellow sticky traps using the Potter spray tower. Long-chains sucrose aliphatic esters were more effective against the silverleaf whiteflies and the highest mortality was obtained with sucrose oleate and sucrose octanoate. Since these compounds were tensoactive, sodium dodecylsulphate was also tested for the comparison but no effect was observed. Sucrose butyrate and other aliphatic and aromatic sucrose polyesters showed negligible effect on the silverleaf whiteflies.

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