scholarly journals Occurrence of Phytophagous Scarabaeidae (Coleoptera) in a pasture area at the Balsamo municipality, São Paulo, Brazil

2021 ◽  
Vol 14 ◽  
pp. e928
Author(s):  
Flavio Terradas Menis ◽  
Sérgio Roberto Rodrigues

Pasture areas have been decreasing over the years in Brazil, largely due to the expansion of agricultural areas, mainly in the Southeast region. Natural or planted pastures are subject to attack by insects that can become pests depending on their level of infestation and among them are the Scarabaeidae beetles. The scarce information on the species of this family existing in the region of Bálsamo (São Paulo) makes a study on the occurrence of these species necessary, thus generating data that can contribute to identification and information on possible existing pest species. During September 2018 to August 2019, collections of phytophagous Scarabaeidae species were done in pasture areas with a light trap. A total of 446 adults from the subfamilies Dynastinae, Melolonthinae and Rutelinae were collected. In Dynastinae the genera Bothynus, Coelosis, Cyclocephala, Chalepides and Actinobolus were collected, in Melolonthinae the genera Plectris and Liogenys and in Rutelinae the genera Anomala, Geniates, Leucothyreus, Lobogeniates, Byrsopolis and Trizogeniates were found. Among the species collected, some are described as pests in crops, including pastures, such as Liogenys suturalis Blanchard, which was the species that had the largest number of individuals during the collection period, being indicated as a species worthy of more detailed studies.

Author(s):  
Claudio R. GONSALEZ ◽  
Jorge CASSEB ◽  
Francisco G. V. MONTEIRO ◽  
João B. PAULA-NETO ◽  
Rufino B. FERNANDEZ ◽  
...  

A clinical trial pilot study, double-blinded, randomized, and controlled with a placebo to assess the effectiveness of oral doxycycline (200 mg, single dose) in preventing leptospirosis after high exposure to potentially contamined water was performed in São Paulo, SP, Brazil. Confirmed cases were defined as those with leptospira IgM antibody and symptoms; asymptomatic cases were those presenting with IgM antibodies but no symptoms; and suspected cases were individuals with symptoms but no IgM antibody. Forty subjects were given doxycycline and 42 were given placebo. In the drug-treated group there were 2 confirmed cases, 11 asymptomatic cases, and 6 suspected cases. In the placebo group there were 5 confirmed, 6 symptomatic, and 5 suspected cases. Even though we found a protective association of doxycycline for confirmed leptospirosis cases (RR = 2.3) and seroconversion only (RR = 2.0), the association was not statistically significant because of the small number of individuals enrolled in this pilot study. We observed that the 22% of the volunteers already had IgM antibodies to leptospirosis at the first sampling. Finally, the attack rate to confirmed, asymptomatic, and suspected cases of Leptospirosis was 8.5%, 22%, and 13%, respectively, in this population.


2018 ◽  
Vol 18 (4) ◽  
Author(s):  
Juliano Rodrigues Honorio ◽  
Itamar Alves Martins

Abstract: This study focus on an inventory of the ichthyofauna of the Una river, a tributary of the Paraíba do Sul river, located in the region of Paraíba do Sul River Valley, in the State of São Paulo. Sampling was carried out in three sampling areas along the channel of the Una river between April 2016 and March 2017. For the collection of fish specimens, was used angling, fyke nets, cast nets, dragnets and hand nets. A total of 1.534 specimens were collected, which corresponds to five different orders, 14 families, 26 genera and thirty species. The study revealed that the most significant number of reported species are from the orders Siluriformes and Characiformes. The Characidae family was the most representative concerning the wealth of species and Astyanax aff. bimaculatus (two spot Astyanax | lambari-do-rabo-amarelo) was the species with the highest number of individuals captured. The freshwater ichthyofauna of the Una river is composed of eight species considered allochthonous and one exotic. Of the thirty species listed in this study, five are new records for the Paraíba do Sul river basin.


2020 ◽  
Vol 28 (76) ◽  
Author(s):  
Cristiane Brum Bernardes

RESUMO Introdução: Em um contexto de intensificação da interatividade, da hiperconectividade e da mobilidade, e ampliação das possibilidades de contato entre instituições legislativas e cidadãos por veículos digitais, este estudo analisa, comparativamente, como as quatro assembleias legislativas da Região Sudeste do Brasil utilizam os perfis institucionais criados no Facebook. O objetivo é compreender como o processo de engajamento público, conforme conceituado por Leston-Bandeira (2014), está sendo realizado pelas casas legislativas nessa plataforma. Materiais e Métodos: A coleta de dados empíricos sobre os perfis das assembleias legislativas de São Paulo, Minas Gerais, Rio de Janeiro e Espírito Santo foi realizada entre agosto de 2018 e outubro de 2019. Foram aplicadas as seguintes técnicas: 1) entrevistas em profundidade com os gestores da comunicação digital das casas e 2) análise comparativa das publicações e dos comentários no Facebook no período entre agosto de 2018 e janeiro de 2019. Os dados dos perfis foram coletados por meio do aplicativo Netvizz e analisados posteriormente a partir do Excel. As entrevistas foram realizadas entre agosto e dezembro de 2018 e em outubro de 2019 de forma presencial ou via internet (Skype e vídeo do WhatsApp). Resultados: Os dados comparativos revelam que o perfil @assembleiademinas fez um uso mais intenso do Facebook no período analisado, apesar de ter menos seguidores do que os perfis da ALERJ e da ALESP. Para além de postar mais, o perfil da ALMG alcançou mais interações dos cidadãos, especialmente por meio das reações a algumas postagens feitas em outubro e dezembro de 2018. Das quatro assembleias analisadas, o perfil da ALES é o que teve o menor alcance quantitativo, em número de usuários que interagem, tanto em relação às reações, quanto aos comentários. ALMG tem o perfil que recebeu mais reações por postagem, enquanto a ALESP recebeu mais comentários por post no período. Discussão: A conclusão mais geral é que as quatro casas legislativas analisadas não conseguem realizar o monitoramento das contribuições dos internautas e promover uma interação mais dialógica com eles, ficando centradas nos níveis de informação, compreensão e identificação do processo de engajamento público. Há, portanto, uma dificuldade de incluir os aspectos da participação e da intervenção na decisão política nas dinâmicas das mídias sociais. Em última medida, ao não aproveitarem o potencial dialógico das redes, as assembleias legislativas desperdiçam oportunidades de contato com o cidadão e ampliam seu distanciamento da sociedade.


2008 ◽  
Vol 16 (1) ◽  
pp. 70-74 ◽  
Author(s):  
Lilian Berta Rihs ◽  
Maria da Luz Rosário de Sousa ◽  
Ronaldo Seichi Wada

2019 ◽  
Vol 41 (1) ◽  
Author(s):  
Sidnéia Terezinha Soares de Matos ◽  
Daniel Júnior de Andrade ◽  
Renan Moisés Paneghini Zanata ◽  
Emiliano Brandão de Azevedo ◽  
Élison Fabrício Bezerra Lima

Abstract The mango tree (Mangifera indica L.), native to Asia, is expanding in Brazil. However, research related to phytophagous organisms and natural enemies associated with this fruit are scarce in the country. The aim of this work was to report new species of thrips-pest and natural enemies associated with mango tree inflorescence. The work was carried out in a Tommy Atkins mango orchard located in the municipality of Jardinópolis, São Paulo, Brazil. The arthropods found in malformed inflorescences were collected and identified. Frankliniella gemina Bagnall, Frankliniella distinguenda Bagnall (Thysanoptera: Thripidae) and Haplothrips gowdeyi (Franklin) (Thysanoptera: Phlaeothripidae) thrips-pest species were recorded for the first time associated with inflorescence in mango orchards. The predators were collected in association with the phytophagous thrips.


2003 ◽  
Vol 63 (4) ◽  
pp. 647-653 ◽  
Author(s):  
H. N. Oliveira ◽  
J. C. Zanuncio ◽  
D. Pratissoli ◽  
M. C. Picanço

Individuals of two populations of Trichogramma maxacalii (Hymenoptera: Trichogrammatidae) were collected from eggs of Euselasia apisaon (Lepidoptera: Riodinidae), a lepidopteran defoliator of Eucalyptus, in plantations in the states of São Paulo and Minas Gerais, Brazil. This study investigated the sex ratio, number of parasitoids per egg, and longevity of individuals of these two populations of T. maxacalii, when this parasitoid was reared receiving eggs of the factitious host Anagasta kuehniella (Lepidoptera: Pyralidae) in different periods after emergence, and with or without honey. Sex ratio of T. maxacalii varied from 0.44 to 0.60, and was affected by the interaction between populations, availability of food (honey), and length of time in which the parasitoid stayed without host eggs after their emergence. The population of T. maxacalii collected in São Paulo produced a larger number of individuals per egg of the host A. kuehniella and lived longer when fed.


2016 ◽  
Vol 5 (1) ◽  
pp. 28 ◽  
Author(s):  
Fernando Berton Baldo ◽  
Adalton Raga ◽  
Jeferson Luiz de Carvalho Mineiro ◽  
Jairo Lopez de Castro

The international literature does not provide much information about the incidence of species of mites in nectarine cultivars. The purpose of the present study was to determine diversity and dynamics of populations of mites and their interactions in different nectarine cultivars in the southwestern region of the State of São Paulo, Brazil. These mites were split into 15 families, 22 genders and 28 species. <em>Aculus fockeui </em>(Nalepa &amp; Trouessant) (Eriophyidae) was the most abundant species, with 90.2 % of the mites collected. The populations of <em>A. fockeui</em> displayed specific periods with greater number of individuals. Phytoseiidae showed the highest richness of species. <em>Ricoseius loxocheles</em> (De Leon) and <em>Euseius ho</em> (De Leon) were the most abundant predators. <em>Euseius ho </em>population showed a positive correlation with rainfall.


2012 ◽  
Vol 103 (1) ◽  
pp. 89-97 ◽  
Author(s):  
K.L. Silva-Brandão ◽  
L.C. Almeida ◽  
S.S. Moraes ◽  
F.L. Cônsoli

AbstractTelchin licus, the giant sugarcane borer, is an important pest species of sugarcane in northeast Brazil. Four subspecies of Telchin licus are recognized in Brazil based on their geographic distribution and subtle differences in wing colour pattern. Some taxa are morphologically indistinguishable, and their accurate identification is key to their efficient control. Mitochondrial genes sequences (cytochrome oxidase I and subunit 6 of the nicotinamide adenine dinucleotide dehydrogenase) were applied to delimit taxonomic entities of T. licus, and to infer the origin of a newly established population in the state of São Paulo. The molecular data indicated that specimens sampled at different regions in Brazil are morphologically cryptic but genetically isolated entities, and at least three subspecies were assigned to the sampled localities. These data also suggested that the population collected from the state of São Paulo must have a common origin with populations from northeast Brazil, which corroborate the hypothesis that ornamental plants infested with larvae of T. licus might have been transported from the northeast to the southeast regions.


Author(s):  
CLAUDIO A. SPADOTTO ◽  
HELOISA FILIZOLA ◽  
MARCO A. F. GOMES

Os potenciais de lixiviação de dezenove pesticidas nos primeiros 60 cm de latossolo da região de Guaíra, Estado de São Paulo, foram estimados mediante fator de atenuação ( AF). O modelo aplicado considerou propriedades do pesticida e do solo, assim como a taxa de recarga hídrica líquida. Os pesticidas com maior potencial de lixiviação foram: Monocrotofós > Carbofuran > Metalaxil > Aldicarb > Metolaclor > Metamidofós. Para todos os pesticidas estudados naquele latossolo, o retardamento da lixiviação devido à volatilização foi muito pequeno quando comparado com o retardamento devido à sorção. Todos os pesticidas que apresentaram os mais altos potenciais de lixiviação foram os mais solúveis em água, com valores do coeficiente de partição ( Koc) iguais ou menores que 200 mL/g. Além disso, a meia-vida da maioria destes pesticidas excedeu 30 dias. Os resultados obtidos permitiram estimar que 15,2% do Monocrotofós, 5,7% do Carbofuran e 2,5% do Metalaxil que atinge a superfície do solo ultrapassariam os primeiros 60 cm do perfil do solo, sendo que cerca de 8 mg para cada 100 g de Monocrotofós aplicados na superfície do solo passariam através dos primeiros 3 m. Com base nos baixos valores de AF calculados, o potencial de lixiviação dos pesticidas que têm sido usados em áreas agrícolas de Guaíra (SP) sobre latossolos apresenta-se baixo, assim como o conseqüente risco de contaminação da água subterrânea. ASSESSING LEACHING POTENTIAL OF PESTICIDES IN OXISOL FROM GUAÍRA REGION, STATE OF SÃO PAULO, BRAZIL Abstract The leaching potentials of nineteen pesticides in the top 60 cm of a Brazilian Oxisol from Guaira region, São Paulo state were estimated by means of the Attenuation Factor ( AF) method. The model applied considers pesticide and soil properties, as well as, the net recharge rate. The highest leaching potential pesticides were: Monocrotophos > Carbofuran > Metalaxyl > Aldicarb > Metolachlor > Metamidophos. For all of the pesticides studied in that Brazilian Oxisol, the leaching retardation due to the volatilization was very low when compared with the retardation due to sorption. All of the pesticides receiving the top leaching potential ranking were the most soluble pesticides , and they have organic carbon partitioning coefficient values equal 200 mL/g or lower. For almost all of these pesticides, half-life values exceed 30 days. Results allowed to estimate that 15.2% of Monocrotophos, 5.7% of Carbofuran, and 2.5% of Metalaxyl that reaches the soil surface would pass through the top 60 cm of the soil profile, and about 8 mg per 100 g of Monocrotophos applied on the soil surface would pass through the top 3 m. According to the AF values calculated, the leaching potential of the pesticides in use in Guaira (SP) agricultural areas with Oxisols is low, as well the consequent ground water contamination risk.


2013 ◽  
Vol 9 (1) ◽  
pp. 85 ◽  
Author(s):  
Marília Masello Junqueira Franco ◽  
Antonio Carlos Paes ◽  
Márcio Garcia Ribeiro ◽  
José Carlos de Figueiredo Pantoja ◽  
Adolfo Carlos Barreto Santos ◽  
...  

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