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au:BUENO, A. H. S.

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Proposal of a Novel Criteria for Soil Corrosivity Evaluation and the Development of New Soil Synthetic Solutions for Laboratory Investigations
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Giarola, J. M.

; Santos, B. A. F.

; Souza, R. C.

; Serenario, M. E. D.

; Martelli, P. B.

; Souza, E. A.

; Gomes, J. A. C. P.

; Bueno, A. H. S.

Materials Research

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2022, Volume 25 elocation e20210521

Abstract: En | Text: En | PDF: En

Abstract A novel method to classify the aggressiveness of soil considering its physicochemical content and the development of new synthetic solutions for lab uses is proposed. The results showed that the main criteria existing in the literature for soil corrosivity classification might cause misunderstandings about the real aggressiveness. The synthetic solutions proposed aim to cover a wide range of soil found worldwide in order to refine the assessment of their characteristics hence their corrosivity. For the lab experiments, an API 5L X65 pipeline carbon steel was used. The solutions presented great reliability, and they seemed to be adequate to simulate soils with the presence of sulfate-reducing bacteria (SRB), chloride, and high pH.

https://doi.org/10.1590/1980-5373-mr-2021-0521

Combined Analytical Py-GC/MS, SEM, FTIR and 13C NMR for Investigating the Removal of Trace Metals from Aqueous Solutions by Biochar
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Andrade, Minéia A. M. de

; Monteiro, Adnívia S. C.

; Gontijo, Erik S. J.

; Bueno, Carolina C.

; Macedo, João C. A.

; Rangel, Elidiane C.

; Melo, Darllene S.

; Montero, José I. Z.

; Rosa, André H.

Journal of the Brazilian Chemical Society

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jul 2020, Volume 31 N. 7 Pages 1518 - 1530

Abstract: En | Text: En | PDF: En

In this study, the efficiency of biochar (BC) produced from sugarcane bagasse at different pyrolysis temperatures (300, 400, 500 and 600 ºC) for simultaneous removal of CdII, PbII, CuII, CrIII, NiII and ZnII ions from aqueous solutions was assessed. All BC were characterized using scanning electron microscopy (SEM), Fourier transform infrared (FTIR), 13C nuclear magnetic resonance (13C NMR) and pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS). The effects of pyrolysis temperature, initial adsorbate concentration and adsorbent dosage on adorption capacity of BC were examined through batch experiments. The BC efficiency was also evaluated after a desorption cycle. The maximal adsorptions (CdII: 51.50%, CrIII: 74.35%, CuII: 91.18%, NiII: 47.05%, PbII: 96.17% and ZnII: 40.50%) were observed for BC produced at 500 ºC, probably because of its higher porosity and presence of functional groups detected by SEM and FTIR. The maximum adsorption capacity for CdII, CrIII, CuII, NiII and ZnII (ions fitted to Langmuir model) were 175, 303, 455, 156 and 128 µg g-1, respectively. The predominance of phenolic groups observed in Py-GC-MS data may explain the high percentage of multi-element removal. Experimental data were best fitted to pseudo-second order, Sips and Freundlich models. The BC presented good removal results after a desorption cycle.

https://doi.org/10.21577/0103-5053.20200038 315 downloads

Presence of Coliforms bacteria, fungi and aflatoxins in medicinal plants marketed in Nayarit, Mexico.
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Bueno-Durán, A. Y.

; Barcelos-García, R. G.

; Ventura-Ramón, G. H.

; Toledo-Ibarra, G. A.

; Navidad-Murrieta, M. S.

; Zambrano-Soria, M.

; Robles Pérez, A. G.

; Girón-Pérez, M. I.

Revista bio ciencias

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2019, Volume 6 N. spe elocation e636

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract The consumption of medicinal plants has been currently increasing, either as alternative medicine (under the argument that “natural is innocuous”) or as first-line medicine, due to the lack of health services; however, scientifically there is little certainty about the safety of these products, a situation that far from favoring the consumer’s health, might put it at risk. Therefore, the aim of this work was to evaluate the presence of total and fecal coliforms, Escherichia coli, fungi and total aflatoxins in the most marketed medicinal plants in the city of Tepic, Nayarit, Mexico. Analyzed medicinal plants were the most commercialized for the autumn-winter and spring-summer seasons. The results showed that 51.8 % of the analyzed samples were contaminated by total coliforms, 12 % by fecal coliforms and 6 % by E. coli. Regarding fungi, those of greatest presence were of the genus Aspergillus, identifying the species A. niger, A. fumigatus, and A. terreus. Aflatoxins were found in 44.6 % of analyzed samples and 21.7 % showed levels above the permissible limits (>20ppb). The presence of this type of contaminants in medicinal plants evidenced bad practices in the handling of this type of products, and represented a risk for consumer’s health, since the microorganisms detected in this work are potential pathogens, and in the case of mycotoxins, they are carcinogenic. Thus, a strict regulation in the management (cultivation, storage and commercialization) of this type of products is necessary to ensure their safety.

Resumen Actualmente el consumo de hierbas medicinales ha ido en aumento, ya sea como medicina alternativa (bajo el argumento de que lo “natural es inocuo”) o como medicina de primera instancia, debido a la carencia de servicios de salud; sin embargo, científicamente existe poca certidumbre sobre la inocuidad de estos productos, situación que lejos de favorecer la salud del consumidor, puede poner en riesgo la misma. Por lo tanto, el objetivo de este trabajo fue evaluar la presencia de bacterias coliformes totales, fecales, Escherichia coli, hongos y aflatoxinas totales en las hierbas medicinales más comercializadas en la Ciudad de Tepic, Nayarit, México. Las hierbas medicinales analizadas fueron las de mayor comercialización para la temporada otoño-invierno y primavera-verano. Los resultados mostraron que el 51.8 % de las muestras analizadas presentaron contaminación por coliformes totales, el 12 % por coliformes fecales y el 6 % por E. coli. Con respecto a los hongos, los de mayor presencia fueron del género Aspergillus, identificándose las especies A. niger, A. fumigatus y A. terreus. La presencia de aflatoxinas se encontraron en el 44.6 % de las muestras analizadas y el 21.7 % presentaron niveles por arriba de los límites permisibles (>20ppb). La presencia de este tipo de contaminantes en hierbas medicinales, evidencian malas prácticas en el manejo de este tipo de productos representando un riesgo para la salud del consumidor, ya que los microorganismos detectados en este trabajo son patógenos potenciales, y en el caso de las micotoxinas, son carcinogénicas, por lo que es necesaria una regulación estricta en el manejo (cultivo, almacenamiento y comercialización) de este tipo de productos que permitan asegurar su inocuidad.

https://doi.org/10.15741/revbio.06.nesp.e636 693 downloads

Prediction of rapid maxillary expansion by assessing the maturation of the midpalatal suture on cone beam CT
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Angelieri, Fernanda

; Franchi, Lorenzo

; Cevidanes, Lucia H. S.

; Bueno-Silva, Bruno

; McNamara Jr., James A.

Dental Press Journal of Orthodontics

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dec 2016, Volume 21 N. 6 Pages 115 - 125

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO A expansão rápida da maxila (ERM) essencialmente consiste na abertura mecânica da sutura palatina mediana tanto nos ossos maxilares quanto nos ossos palatinos. A fusão da sutura palatina mediana determina o insucesso da ERM, um evento comum na adolescência tardia e fase adulta jovem. Recentemente, propôs-se a avaliação da maturação da sutura palatina mediana em tomografias computadorizadas de feixe cônico (TCFC), sendo apresentados cinco estágios maturacionais: Estágio A = linha sutural de alta densidade retilínea, sem ou com suave interdigitação; Estágio B = linha sutural de alta densidade, com aspecto tortuoso; Estágio C = duas linhas de alta densidade, paralelas e curvilíneas, que se aproximam em algumas regiões e, em outras, são separadas por espaços de baixa densidade; Estágio D = a fusão ocorreu no osso palatino, onde não há evidência de sutura; e Estágio E = fusão completa, que se estende anteriormente na maxila. No Estágio C, esperam-se menores efeitos esqueléticos da ERM, comparado aos Estágios A e B, visto que há muitas pontes ósseas ao longo da sutura. Para pacientes nos Estágios D e E, a expansão rápida da maxila assistida cirurgicamente (ERMAC) seria necessária, já que a fusão da sutura palatina mediana ocorreu parcial ou totalmente. Esse método de diagnóstico pode ser utilizado para estimar o prognóstico da ERM, principalmente na adolescência tardia e fase adulta jovem, período em que esse procedimento ainda apresenta-se imprevisível clinicamente.

ABSTRACT Rapid maxillary expansion (RME) primarily involves the mechanical opening of the midpalatal suture of the maxillary and palatine bones. The fusion of the midpalatal suture determines the failure of RME, a common event in late adolescents and young adults. Recently, the assessment of the maturation of midpalatal suture as viewed using cone beam computed tomography (CBCT) has been introduced. Five maturational stages of the midpalatal suture have been presented: Stage A = straight high-density sutural line, with no or little interdigitation; Stage B = scalloped appearance of the high-density sutural line; Stage C = two parallel, scalloped, high-density lines that lie close to each other, separated in some areas by small low-density spaces; Stage D = fusion of the palatine bone where no evidence of a suture is present; and Stage E = complete fusion that extends also anteriorly in the maxilla. At Stage C, less skeletal response would be expected than at Stages A and B, as there are many bony bridges along the suture. For patients at Stages D and E, surgically assisted RME would be necessary, as the fusion of the midpalatal suture already has occurred either partially or totally. This diagnostic method can be used to estimate the prognosis of the RME, mainly for late adolescents and young adults for whom this procedure is unpredictable clinically.

https://doi.org/10.1590/2177-6709.21.6.115-125.sar 8108 downloads

Update of the Brazilian floristic list of Algae and Cyanobacteria
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Menezes, Mariângela

; Bicudo, Carlos E. M.

; Moura, Carlos W. N.

; Alves, Aigara M.

; Santos, Alana A.

; Pedrini, Alexandre de G.

; Araújo, Andréa

; Tucci, Andrea

; Fajar, Aurelio

; Malone, Camila

; Kano, Cecília H.

; Sant'Anna, Célia L.

; Branco, Ciro Z.

; Odebrecht, Clarisse

; Peres, Cleto K.

; Neuhaus, Emanuel B.

; Eskinazi-Leça, Enide

; Aquino, Eveline

; Nauer, Fabio

; Santos, Gabriel N.

; Amado Filho, Gilberto M.

; Lyra, Goia M.

; Borges, Gyslaine C.P.

; Costa, Iara O.

; Nogueira, Ina de S.

; Oliveira, Ivania B.

; Paula, Joel. C.de

; Nunes, José M. de C.

; Lima, Jucicleide C.

; Santos, Kleber R.S.

; Ferreira, Leandro C.

; Gestinari, Lísia M.S.

; Cardoso, Luciana S.

; Figueiredo, Marcia A.O.

; Silva, Marcos H.

; Barreto, Maria B.B.B.

; Henriques, Maria C.O.

; Cunha, Maria da G.G.S.

; Bandeira-Pedrosa, Maria E.

; Oliveira-Carvalho, Maria F.

; Széchy, Maria T.M.

; Azevedo, Maria T.P.

; Oliveira, Mariana C. de

; Cabezudo, Mariê M.

; Santiago, Marilene F.

; Bergesh, Marli

; Fujii, Mutuê T.

; Bueno, Norma C.

; Necchi Jr., Orlando

; Jesus, Priscila B.

; Bahia, Ricardo G.

; Khader, Samir

; Alves-da-Silva, Sandra M.

; Guimarães, Silvia M.P.B.

; Pereira, Sonia M.B.

; Caires, Taiara A.

; Meurer, Thamis

; Cassano, Valéria

; Werner, Vera R.

; Gama Jr., Watson A. da

; Silva, Weliton J. da

Rodriguésia

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2015, Volume 66 N. 4 Pages 1047 - 1062

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Apresenta-se uma síntese atualizada de informações sobre algas no Brasil objetivando refinar os dados reunidos até o presente, bem como avaliar os avanços sobre o conhecimento da diversidade de algas no país desde a publicação do Catálogo de Plantas e Fungos do Brasil. Os resultados de 2015 mostraram um acréscimo de 1.250 espécies (35.7%) a um total de 4.747 em relação a 2010. As classes mais diversas em número de espécies foram Bacillariophyceae, Conjugatophyceae, Florideophyceae, Cyanophyceae, Dinophyceae e Euglenophyceae. Bacillariophyceae e Cyanophyceae tiveram o maior acréscimo de espécies no intervalo de cinco anos. A região Sudeste e Sul foram as mais diversas, porém, as regiões Nordeste com os estados do Piauí e Sergipe e Centro-Oeste com os estados de Mato Grosso, Goiás e Distrito Federal destacaram-se no cenário da biodiversidade nacional. Apesar da escassez de taxonomistas e da infraestrutura limitada, os resultados obtidos evidenciaram um avanço significativo no conhecimento da diversidade de algas no país nesse período de cinco anos, iniciando uma mudança quanto as diferenças geográficas regionais.

Abstract An updated synthesis of cyanobacteria and algae information is presented for Brazil aiming to refine the data gathered to date and evaluate the progress of the biodiversity knowledge about these organisms in the country since the publication of the Catálogo de Plantas e Fungos do Brasil. The results of 2015 showed an increase of 1,250 species (35.7%) when compared to 2010, reaching a total of 4,747 species. The most diverse classes in species number were the Bacillariophyceae, Conjugatophyceae, Florideophyceae, Cyanophyceae, Dinophyceae and Euglenophyceae. Bacillariophyceae and Cyanophyceae had the highest increase in species number in the five-year interval. The Southeast and South regions were the most diverse, however, the Northeast, with the states of Piauí and Sergipe, and the Central-west region, with Mato Grosso, Goiás and Distrito Federal, also stood out in the national algal biodiversity scenario. Despite the shortage of taxonomists and limited infrastructure, the results showed a significant improvement in the knowledge regarding the diversity of cyanobacteria and algae in the country during the study period, starting to even out regional geographical differences caused by subsampling.

https://doi.org/10.1590/2175-7860201566408 4865 downloads

Functional response of Telenomus remus Nixon(Hymenoptera, Scelionidae) to Spodoptera frugiperda (J. E. Smith) (Lepidoptera, Noctuidae) eggs: effect of female age
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Carneiro, Tatiana R.

; Fernandes, Odair A.

; Cruz, Ivan

; Bueno, Regiane C. O. F.

Revista Brasileira de Entomologia

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2010, Volume 54 N. 4 Pages 692 - 696

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

A resposta funcional de fêmeas de Telenomus remus com 24 h e 48 h de idade foi observada em ovos de Spodoptera frugiperda. O experimento foi conduzido em câmara climatizada regulada a 25 ± 1°C, 70 ± 10% UR e fotofase de 12h. As fêmeas de T. remus foram alimentadas com mel e mantidas individualmente por 24h em tubos de vidro que continham 25, 50, 75, 100, 150, 200, 250 ou 300 ovos de S. frugiperda. Foi adotado o delineamento experimental inteiramente casualizado com 10 repetições. Os parâmetros avaliados para a construção da curva de resposta funcional foram o parasitismo médio diário, a taxa de busca e o tempo de oviposição. Foi observado que com o aumento da densidade de ovos também cresce o parasitismo em fêmeas com 24 h e 48 h de idade e que há uma tendência de estabilização do parasitismo na densidade de 150 ovos/fêmea. Os resultados mostraram uma curva de resposta funcional do tipo II para fêmeas de T. remus com 24 h e 48 h de idade.

Functional response of Telenomus remus Nixon (Hymenoptera, Scelionidae) to Spodoptera frugiperda (J. E. Smith) (Lepidoptera, Noctuidae) eggs: effect of female age. Functional response of 24-h and 48-h-old Telenomus remus adults was studied on Spodoptera frugiperda eggs. The study was carried out in climatic chamber regulated at 25 ± 1°C, 70 ± 10% RH and 12:12h (L: D). Females of T. remus were honey fed and individualized in glass vials along with 25, 50, 75, 100, 150, 200, 250 or 300 eggs of S. frugiperda for 24 h. Complete randomized design with ten replications was adopted. The parameters evaluated to construct the functional response curve were daily average parasitism, searching rate and oviposition time. It was observed that the higher the egg density, the higher the parasitism for 24-h and 48-h-old females although there was a tendency of parasitism stabilization at 150-egg density. The results showed a type II functional response curve for both 24-h and 48-h-old female.

3315 downloads

Nyssomyia intermedia (Lutz & Neiva) and Nyssomyia neivai (Pinto) (Diptera, Psychodidae, Phlebotominae) in a sympatric area: seasonal and nocturnal hourly rhythm in black and white modified Shannon traps
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Galati, Eunice A. B.

; Marassá, Ana Maria

; Gonçalves-Andrade, Rute Maria

; Bueno, Edna Fátima Maria

; Paiva, Byanca R.

; Malafronte, Rosely S.

Revista Brasileira de Entomologia

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2010, Volume 54 N. 4 Pages 677 - 686

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Objetivando identificar aspectos do comportamento de duas espécies crípticas, simpátricas e implicadas na transmissão de leishmaniose tegumentar, Nyssomyia intermedia (Lutz & Neiva, 1912) e Nyssomyia neivai (Pinto, 1926), procederam-se capturas com armadilhas de Shannon preta e branca, instaladas lado a lado, mensalmente, de julho/2001 a junho/2002, das 18-07 horas, em peridomicílio no município de Iporanga, Estado de São Paulo, Brasil. Um total de 2.142 espécimes foi capturado, Ny. intermedia (47,4%) e Ny. neivai (50,5%). A armadilha branca foi mais atrativa para ambos os sexos das duas espécies. Machos de Ny. neivai predominaram (70%) sobre os de Ny. intermedia nas duas armadilhas; na preta, as fêmeas de Ny. intermedia predominaram (63,3%) sobre às de Ny. neivai (36,7%); 70% dos espécimes de ambas as espécies foi capturado entre 18h e 24h. Fêmeas de Ny. intermedia apresentaram o maior pico das 19-20h e as de Ny. neivai das 20-21h. Na armadilha preta, a maior média horária para as fêmeas de Ny. intermedia ocorreu no inverno e para os machos, no verão; para Ny. neivai, ambos os sexos predominaram no verão. Na branca, ambos os sexos de ambas as espécies foram mais atraídos no verão. A alta predominância de ambas as espécies sugere que estejam atuando na transmissão da leishmaniose cutânea na área.

Captures with black and white Shannon traps were undertaken to identify aspects of the behavior of the two cryptic and sympatric species implicated as vectors of cutaneous leishmaniasis, Nyssomyia intermedia (Lutz & Neiva, 1912) and Nyssomyia neivai (Pinto, 1926). The traps were installed side by side, monthly, from July 2001 to June 2002, from 18 to 07 hours, in a peridomicile of Iporanga municipality, state of São Paulo, Brazil. A total of 2,142 specimens were captured, Ny. intermedia (47.4%) and Ny. neivai (50.5%). The white trap was more attractive to both sexes of both species. Males of Ny. neivai predominated (70%) over those of Ny. intermedia on the two traps; on the black trap, the females of Ny. intermedia predominated (63.3%) over those of Ny. neivai (36.7%). Seventy percent of the specimens of both species were captured between 18 and 24 h. Females of Ny. intermedia presented the highest peak at 19-20 h, and those of Ny. neivai at 20-21 h. The highest hourly average for females of Ny. intermedia on the black trap occurred in the winter and that for males in the summer. For Ny. neivai, both sexes predominated in the summer. The two species probably transmit the cutaneous leishmaniasis in the area due to their great predominance.

2435 downloads

Eosinophilic pneumonitis induced by aerosol-administered diesel oil and pyrethrum to mice
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Garcia, Maria Lúcia B.

; Santos, Ubiratan P.

; Perini, Adenir

; Acencio, Milena M. P.

; Lopes, Fernanda D. T. Q. S.

; Bueno, Heloisa M. S.

; Saldiva, Paulo H. N.

; Martins, Milton A.

Revista Panamericana de Salud Pública

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jun 2009, Volume 25 N. 6 Pages 518 - 523

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

OBJECTIVE: To confirm the episode of eosinophilic pneumonitis that occurred in March 2001 in Manaus, Amazon, northern Brazil, as secondary to home aerosolization with 2% cypermethrin diluted in diesel compared with the more conventional 1% cypermethrin and soybean solution used in prophylaxis of dengue. METHODS: Four groups of Swiss mice were kept in polycarbonate cages aerosolized with one of the following solutions: diesel, diesel and cypermethrin, soy oil and cypermethrin, and saline. Three and 6 days after exposure, resistance and compliance of the respiratory system and white cell kinetics in peripheral blood and lung tissue were analyzed. RESULTS: The group exposed to diesel and cypermethrin showed higher respiratory system resistance (p < 0.001), lower compliance (p = 0.03), and increased eosinophils in blood (p = 0.03) and lung tissue (p = 0.005) compared with the other groups. There was an increase of neutrophils in the blood of all experimental groups on the third day after exposure (p < 0.001). CONCLUSIONS: We concluded that diesel associated with cypermethrin induced lung hyperresponsiveness in this experimental model and was associated with increased polymorphonuclear cells (eosinophils and neutrophils) in blood and lungs. This effect is strongest on the third day after exposure. These results are similar to the episode that occurred in Manaus in 2001 and suggest that diesel plus cypermethrin home aerosolization for arbovirosis prophylaxis should be revised.

OBJETIVO: Confirmar el episodio de neumonía eosinofílica ocurrido en marzo de 2001 en Manaus, Amazonas, en el norte de Brasil, secundario al uso de aerosol de cipermetrina diluida al 2% en aceite diésel en las viviendas en comparación con la profilaxis más convencional contra el dengue, basada en cipermetrina al 1% con aceite de soya. MÉTODOS: Se mantuvieron cuatro grupos de ratones suizos en jaulas de policarbonato y se aplicó aerosol con una de las siguientes soluciones: aceite diésel, aceite diésel y cipermetrina, aceite de soya y cipermetrina, y solución salina. Se analizaron la resistencia y el funcionamiento del sistema respiratorio y la cinética de leucocitos en sangre periférica y tejido pulmonar a los tres y seis días después de la exposición. RESULTADOS: El grupo expuesto a aceite diésel y cipermetrina mostró mayor resistencia del sistema respiratorio (P < 0,001), peor funcionamiento (P = 0,03) y más eosinófilos en sangre (P = 0,03) y tejido pulmonar (P = 0,005) que los otros grupos. Se observó un aumento de neutrófilos en sangre en todos los grupos experimentales al tercer día después de la exposición (P < 0,001). CONCLUSIONES: El aceite diésel con cipermetrina indujo una hiperrespuesta pulmonar en este modelo experimental y se asoció con un aumento en las células polimorfonucleares (eosinófilos y neutrófilos) en sangre y tejido pulmonar. Este efecto es mayor al tercer día después de la exposición. Estos efectos son similares a los observados en el episodio ocurrido en Manaus en 2001 e indican que se debe reevaluar el uso de aerosol de aceite diésel con cipermetrina para la profilaxis de arbovirus en las viviendas.

2838 downloads

Environmentally induced cracking of API grade steel in near-neutral pH soil
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Bueno, A. H. S.

; Gomes, J. A. C. P.

Journal of the Brazilian Society of Mechanical Sciences and Engineering

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jun 2009, Volume 31 N. 2 Pages 97 - 104

Abstract: En | Text: En | PDF: En

Environmentally induced cracking of pipeline steels in contact with soil have been investigated. Different soils were prepared in order to determine their physical, chemical and bacteriological characteristics. Slow strain rate testing was carried out by using electrolytes obtained from soil samples and NS4 standard solution. Stress vs. strain curves of API 5L grade X46, X60 and X80 steels were obtained at different electrode potentials (Ecorr, 100 mV below Ecorr and 300 mV below Ecorr) with 9 x 10-6 s-1 strain rate. The results obtained with API 5L X46 in soil solution were compared with slow strain rate test (SSRT) results obtained using a strain rate of 9 x 10-7s-1 to the same steel. All results showed the incidence of cracking and their dependence on the potential imposed, revealing the SCC (Stress corrosion cracking) susceptibility of the steels. It was also observed that the hydrogen embrittlement - HE - has an important contribution to cracking initiation and propagation. Cracking morphology was similar to the SCC reported on field condition where transgranular cracking were detected in a pipeline collapsed by land creeping. It was important to point out that even under cathodic potentials the material showed the incidence of secondary cracking and a significant reduction of ductility.

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10.

Fecundidade e longevidade de Aphis gossypii Glover, 1877 (Hemiptera, Aphididae) em diferentes temperaturas e cultivares comerciais de crisântemo (Dendranthema grandiflora Tzvelev)
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Soglia, Maria C. de M.

; Bueno, Vanda H. Paes.

; Rodrigues, Sandra M. M.

; Sampaio, Marcus V.

Revista Brasileira de Entomologia

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2003, Volume 47 N. 1 Pages 49 - 54

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Fecundity and longevity of Aphis gossypii Glover, 1877 (Hemiptera, Aphididae) at different temperatures and commercial chrysanthemum cultivars (Dendranthema grandiflora Tzvelev). The aphid A. gossypii is one of the main pests in a number of crops both under field and protected conditions. The objective of the present study was to evaluate the fecundity and longevity of A. gossypii under different temperatures and commercial chrysanthemum cultivars (Yellow Snowdon, White Reagan and Dark Splendid Reagan) with different trichomes densities (11.3; 16.6 and 21.6 trichome/mm² of the leaf, respectively) The trials were carried out in climatic chambers, at four temperatures (15, 20, 25 and 30 ±1 °C), 70 ± 10% RH and photophase 10h. The reproductive period significantly decreased with increase of temperature in the three cultivars. In Yellow Snowdon cultivar average duration of the reproductive period was 14.3 days at 25 °C. The maximum fecundity was obtained at the temperature of 25 ºC with 3,1; 2,8 and 3,6 nymphs/female/day in the Yellow Snowdon, White Reagan and Dark S. Reagan cultivars, respectively. The total fecundity was reduced by extreme temperatures (15 and 30 °C), and was obtained at 25 °C with 35,9 nymphs/female. Females maintained in Yellow Snowdon cultivar significantly showed superiority (30,7 nymphs/female) in total fecundity in relation to White Reagan (22,1 nymphs/female) and Dark S. Reagan (22,9 nymphs/female). The Yellow Snowdon cultivar (with a lower trichome density) had a significant influence in daily and total capacity of nymphs production, showing a higher fecundity of A. gossypii females. The aphid's longevity was affected by cultivars and temperature, and this longevity decreased whit increase of temperature. The results showed that there was an interaction between the temperature and host plant on reproductive parameters of A. gossypii.

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11.

Parasitism Rates of Lysiphlebus testaceipes (Cresson) (Hym.: Aphidiidae) on Schizaphis graminum (Rond.) and Aphis gossypii Glover (Hem.: Aphididae)
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RODRIGUES, SANDRA M.M.

; BUENO, VANDA H.P.

Neotropical Entomology

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dec 2001, Volume 30 N. 4 Pages 625 - 629

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Este trabalho teve como objetivo estimar a taxa de parasitismo de Lysiphlebus testaceipes (Cresson) em Schizaphis graminum (Rond.) e Aphis gossypii Glover, em testes com e sem escolha. Os ensaios foram conduzidos em câmara climática com 25±1ºC, 70±10% UR e 12h de fotofase. Foram utilizadas, como hospedeiros, ninfas de pulgões de 2º e 3º ínstares e, para cada colônia, utilizou-se uma fêmea de L. testaceipes com menos de um dia de vida. A fêmea era previamente acasalada e sem experiência de oviposição e ficou em contato com os hospedeiros por 24h. No teste com escolha, foram utilizadas 10 colônias de S. graminum e 10 de A. gossypii, tendo como substrato seções de folhas de sorgo. Para o teste sem escolha, foram utilizadas 10 colônias de S. graminum, mantidas em seções de folhas de sorgo e 10 de A. gossypii, em folhas de pimentão. No teste com chance de escolha, o parasitismo foi de 67% e 46% para S. graminum e A. gossypii, respectivamente, enquanto que no teste sem chance de escolha, foram obtidos 76% de parasitismo para S. graminum e 56% para A. gossypii. Não foi observado superparasitismo em S. graminum. O pulgão S. graminum mostrou-se mais adequado para a multiplicação do parasitóide L. testaceipes em condições de laboratório.

The objective of the present study was to estimate the rates of parasitism of Lysiphlebus testaceipes (Cresson) on Schizaphis graminum (Rond.) and Aphis gossypii Glover under choice and no-choice condition tests. The experiments were carried out in a controlled environmental chamber at 25±1ºC temperature, 70±10% RH, and 12h photophase. Second and third instar aphid nymphs were used as hosts and for each colony one less than a day old L. testaceipes female was used. The previously mated and oviposition inexperienced female remained in contact with the hosts for 24 h. In the choice test 10 colonies of S. graminum and 10 colonies of A. gossypii having sections of sorghum leaves as substrate were used. For the no-choice test 10 colonies of S. graminum maintained on sections of sorghum leaves and 10 colonies of A. gossypii maintained on pepper leaves were used. In the choice test the parasitism was 67% and 46% for S. graminum and A. gossypii, respectively whereas in the no-choice test the parasitism was 76% for S. graminum and 56% for A. gossypii. Superparasitism was not observed for S. graminum. The aphid S. graminum was the most suitable for multiplication of the parasitoid L. testaceipes under laboratory conditions.

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12.

Dinâmica populacional da broca-do-Café Hypothenemus hampei (Ferr.) (Coleoptera: Scolytidae) em Lavras, MG
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Ferreira, Antônio J.

; Bueno, Vanda H. P.

; Moraes, Jair C.

; Carvalho, Geraldo A.

; Bueno Filho, Júlio S. de S.

Anais da Sociedade Entomológica do Brasil

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jun 2000, Volume 29 N. 2 Pages 237 - 244

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O monitoramento da broca-do-café Hypothenemus hampei (Ferrari, 1867) foi realizado na cultura do café Coffea arabica L., em Lavras - MG, Brasil, no período de janeiro a junho de 1997, com o objetivo de verificar a sua dinâmica populacional na safra da cultura. Delimitou-se uma área experimental de aproximadamente 1500 m² numa lavoura de café, cultivar Catuaí Amarelo, onde foram realizadas amostragens mensais. Foram coletados frutos pendentes, os quais foram examinados quanto a presença de adultos e formas imaturas (ovo, larva e pupa) da broca-do-café e de parasitóides. Em outra área experimental, localizada no município de Ijaci - MG, formada com as cultivares Mundo Novo, Catuaí Amarelo e Catuaí Vermelho, foi realizada uma amostragem, por ocasião da colheita, determinando-se a percentagem de frutos broqueados/planta/estágio de maturação. Não foram encontrados parasitóides de H. hampei no período da safra. A precipitação pluviométrica foi o fator que mais contribuiu para o baixo crescimento populacional de H. hampei na área estudada. Com relação aos frutos maduros, observou-se uma maior infestação de H. hampei nas cultivares de Catuaí Vermelho e Mundo Novo (frutos vermelhos) em comparação com a cultivar Catuaí Amarelo (frutos amarelos).

The population growth of coffee berry borer Hypothenemus hampei (Ferrari, 1867) in a coffee plantation, Coffea arabica L., located in Lavras county, Minas Gerais State, Brazil was evaluated from January 1997 to June 1997. The objective of this research was to study the population dynamics of this borer, during a season, in the coffee plantation. Therefore, 1500 m² of a coffee crop with the Catuaí Amarelo cultivar were evaluated. The coffee fruits were monthly collected and examined for the presence of adults and immature stages (eggs, larvae and pupae) of H. hampei and its parasitoids. In another coffee plantation area, located in Ijaci - MG and cultivated with Mundo Novo, Catuaí Vermelho and Catuaí Amarelo cultivars, one sampling was made at the harvest time in order to determine the percentage of fruits damaged by coffee berry borer damaged per tree in different maturation stages. During the season, parasitoids were not found in association with H. hampei. Rainfall was possibly the factor which contributed to the low coffee berry borer population in the area. In the second trial area, the coffee berry borer showed preference for red fruits rather than yellow ones.

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13.

Criação de Hippodamia convergens Guérin-Meneville (Coleoptera: Coccinellidae) em ovos de Anagasta kuehniella (Zeller) (Lepidoptera: Pyralidae)
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Kato, Carlos M.

; Bueno, Vanda H.P.

; Moraes, Jair C.

; Auad, Alexander M.

Anais da Sociedade Entomológica do Brasil

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sep 1999, Volume 28 N. 3 Pages 455 - 459

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

A biologia de Hippodamia convergens Guérin-Meneville foi estudada utilizando-se ovos de Anagasta kuehniella (Zeller) como alimento das larvas, em comparação com dieta comumente utilizada, constituída de adultos dos pulgões Schizaphis graminum (Rondani) e Brachycaudus (Appelia) schwartzi Börner. Para os adultos do predador, utilizaram-se adultos do pulgão S. graminum. Os experimentos foram conduzidos a 25 ± 1°C, UR de 70 ± 10% e fotofase de 12 h. O período embrionário, quando as larvas foram alimentadas com as três dietas foi de 3,1; 3,2 e 3,2 dias respectivamente. A duração do período de larva a adulto foi maior na dieta constituída de ovos de A. kuehniella (19,5 dias), entretanto a viabilidade para esse período não diferiu entre as três dietas testadas. Para a fase adulta do predador oriundo de larvas criadas sob os três regimes alimentares, todos os parâmetros reprodutivos e a longevidade foram estatisticamente iguais. Assim, verificou-se que ovos de A. kuehniella podem ser considerados uma dieta em potencial, em substituição aos pulgões S. graminum e B. schwartzi na criação de larvas de H. convergens.

The biology of Hippodamia convergens Guérin-Meneville was studied on three diets, at temperature 25 ± 1°C; 70 ± 10% RH and 12 hours photofase. Eggs of Anagasta kuehniella (Zeller) and two species of aphids, Schizaphis graminum ( Rondani) and Brachycaudus (Appelia) schwartzi Börner, were fed to the larvae. S. graminum was fed to the adults. The lenght of the larval-adult period of H. convergens was higher when the larvae fed on eggs of A. kuehniella (19.5 days), than when they fed on the aphids S. graminum (17.0 days) or B. schwartzi (17.9 days). However, the viability of larva-adult period showed no significant difference among all three tested diets. Longevity and all the reproductive parameters at the adult phase of H. convergens showed no significant difference when the larvae were reared on the three diets. Eggs of A. kuehniella were shown as a suitable alternative food, that be used as a substitute of the aphids, the most commom prey to larvae rearing of H. convergens.

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