scholarly journals Hidrogenionic potential (pH) of the attractant, trap density and control threshold for Ceratitis capitata (DIPTERA: TEPHRITIDAE) on Hamlin oranges in São Paulo central region, Brazil

2013 ◽  
Vol 35 (2) ◽  
pp. 464-470 ◽  
Author(s):  
Paulo Eduardo Branco Paiva ◽  
José Roberto Postali Parra

This study evaluated the effect of initial pH values of 4.5, 6.5 and 8.5 of the attractant (protein bait) Milhocina® and borax (sodium borate) in the field, on the capture of fruit flies in McPhail traps, using 1, 2, 4 and 8 traps per hectare, in order to estimate control thresholds in a Hamlin orange grove in the central region of the state of São Paulo. The most abundant fruit fly species was Ceratitis capitata, comprising almost 99% of the fruit flies captured, of which 80% were females. The largest captures of C. capitata were found in traps baited with Milhocina® and borax at pH 8.5. Captures per trap for the four densities were similar, indicating that the population can be estimated with one trap per hectare in areas with high populations. It was found positive relationships between captures of C. capitata and the number of Hamlin oranges damaged, 2 and 3 weeks after capture. It was obtained equations that correlate captures and damage levels which can be used to estimate control thresholds. The average loss caused in Hamlin orange fruits by C. capitata was 2.5 tons per hectare or 7.5% of production.

2009 ◽  
Vol 69 (1) ◽  
pp. 31-40 ◽  
Author(s):  
MF. Souza-Filho ◽  
A. Raga ◽  
JA. Azevedo-Filho ◽  
PC. Strikis ◽  
JA. Guimarães ◽  
...  

This work was carried out in orchards of guava progenies, and loquat and peach cultivars, in Monte Alegre do Sul, SP, Brazil, in 2002 and 2003. Guavas and loquats were bagged and unbagged bi-weekly and weekly, respectively, for assessment of the infestation period. Peach was only bagged weekly. The assays started when the fruits were at the beginning of development, but still green. Ripe fruits were taken to the laboratory and placed individually into plastic cups. McPhail plastic traps containing torula yeast were hung from January 2002 to January 2004 to assess the fruit fly population in each orchard, but only the Ceratitis capitata population is here discussed. Five tephritid species were reared from the fruits: Anastrepha bistrigata Bezzi, A. fraterculus (Wiedemann), A. obliqua (Macquart), A. sororcula Zucchi, and C. capitata, in addition to six lonchaeid species: Neosilba certa (Walker), N. glaberrima (Wiedemann), N. pendula (Bezzi), N. zadolicha McAlpine and Steyskal, Neosilba sp. 4, and Neosilba sp. 10 (both species are in the process of being described by P. C. Strikis), as well as some unidentified Neosilba species. Ten parasitoid species were obtained from fruit fly puparia, of which five were braconids: Asobara anastrephae (Muesebeck), Doryctobracon areolatus (Szépligeti), D. brasiliensis (Szépligeti), Opius bellus Gahan, and Utetes anastrephae (Viereck), and five figitids: Aganaspis pelleranoi (Brèthes), Dicerataspis grenadensis Ashmead, Lopheucoila anastrephae (Rhower), Leptopilina boulardi (Barbotin, Carlton and Kelner-Pillaut), and Trybliographa infuscata Diaz, Gallardo and Uchôa. Ceratitis capitata showed a seasonal behavior with population density peaking at the second semester of each year. Anastrepha and Neosilba species remained in the orchards throughout both years.


2014 ◽  
Vol 32 (3) ◽  
pp. 101-107 ◽  
Author(s):  
Renata Espolador São João ◽  
Sônia Maria N. M. Montes ◽  
Adalton Raga

Nativa ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 513
Author(s):  
Michele Emily Souza da Silva ◽  
Michel Ariquenes Wochner ◽  
Maria do Socorro Miranda de Sousa ◽  
Marliton Rocha Barreto ◽  
Ricardo Adaime da Silva

As moscas-das-frutas estão presentes em todas as regiões do Brasil e são responsáveis por grandes perdas econômicas em pomares comerciais. Este trabalho teve o objetivo de determinar a riqueza de espécies de moscas-das-frutas, suas respectivas plantas hospedeiras e seus parasitoides em municípios da região norte de Mato Grosso. Foram realizadas coletas de frutos de 34 espécies vegetais, de julho de 2016 a novembro de 2017. Os frutos coletados foram acondicionados em recipientes plásticos para observar a emergência das moscas-das-frutas e parasitoides. Foram obtidos 2.709 espécimes de moscas-das-frutas (cinco espécies) e 179 espécimes de parasitoides (três espécies). Este trabalho apresenta os primeiros registros de hospedeiros de moscas-das-frutas para o Mato Grosso. Adicionalmente, os parasitoides Utetes anastrephae Viereck e Asobara anastrephae (Muesebeck) são relatados pela primeira vez no Estado.Palavras-chave: Anastrepha; Ceratitis capitata; Relação tritrófica; Amazônia Meridional. FRUIT FLIES, THEIR HOST PLANTS AND PARASITOIDS IN THE NORTHERN STATE OF MATO GROSSO, BRAZIL ABSTRACT: Fruit flies are present in all regions of Brazil and are responsible for large economic losses in commercial orchards. This work aimed to determine the richness of fruit fly species, their host plants and their parasitoids in municipalities in the northern region of Mato Grosso. We collected fruits from 34 plant species, from July 2016 to November 2017. The collected fruits were packed in plastic containers to observe the emergence of fruit flies and parasitoids. We obtained 2,709 specimens of fruit flies (five species) and 179 specimens of parasitoids (three species). This work presents the first records of hosts of fruit flies for Mato Grosso. In addition, the parasitoids Utetes anastrephae Viereck and Asobara anastrephae (Muesebeck) are reported for the first time in the State.Keywords: Anastrepha; Ceratitis capitata; Tritrophic relationship; Southern Amazon.


2011 ◽  
Vol 94 (4) ◽  
pp. 787-794 ◽  
Author(s):  
Adalton Raga ◽  
Miguel F. De Souza-Filho ◽  
Rogerio A. Machado ◽  
Mário E. Sato ◽  
Romildo C. Siloto

Author(s):  
Adalton Raga ◽  
Fernando Berton Baldo ◽  
Sara Braga E Silva ◽  
Larissa Ketlin da Silva Ferreira ◽  
Leonardo Tambones Galdino ◽  
...  

Toxic bait is an alternative to manage fruit flies (Tephritidae) in orchards and in wide-area programmes. The mortality caused by different dilutions of spinosad baits on adults of Ceratitis capitata (Wied.) and Anastrepha grandis (Macquart) (Tephritidae) were compared with a hydrolysed protein (BioAnastrepha) and water in laboratory. Females and males of C. capitata and A. grandis were exposed to Success® 0.02CB (GF-120 NF Naturalyte fruit-fly, 0.02% spinosad) diluted in distilled water (v/v) at 1:1.5; 1:4.5; 1:9.0 and 1:18.0. Spinosad dilutions at 1: 1.5 and 1: 4.5 showed similar effects and provided 100% adult mortality 24 hours after exposure to the baits. Anastrepha grandis was more susceptible to spinosad baits than C. capitata. Females of C. capitata were less susceptible to spinosad diluted at 1: 1.5, 1: 4.5 and 1: 90, than C. capitata males and both sexes of A. grandis. The values of lethal times (LT50) varied for the different dilutions of spinosad for both fruit-fly species; however, with different patterns for each species. The LT50 values of the two highest concentrations (1: 1.5, 1: 4.5) of spinosad bait were similar for fruit flies of both sexes of each species, but a significant difference was observed between species, with higher LT50 values for C. capitata. In general, the cumulative mortalities of spinosad baits increased at 240, 360, 480 minutes and 24 hours after exposure. BioAnastrepha was shown to be toxic to both species, especially for A. grandis, killing 82% of females and 72% of males at 24 hours after exposure. Spinosad bait may be used in different dilutions to manage C. capitata and A. grandis, with similar toxicity for the two highest spinosad concentrations.


2015 ◽  
Vol 67 (2) ◽  
pp. 441-446 ◽  
Author(s):  
A.S. Zucatto ◽  
M.C.C. Aquino ◽  
S.V. Inácio ◽  
R.N. Figueiredo ◽  
J.C. Pierucci ◽  
...  

Considering the proximity of sheep farmers to animals that are possibly diseased or releasing fecal oocysts into the environment and the marked pathogenicity in lambs, the aim of this study was to determine the occurrence and to molecularly characterize the infection by Cryptosporidium spp. in lambs in the South Central region of the state of São Paulo, Brazil. A total of 193 fecal samples were collected from sheep of several breeds, males and females, aged up to one year. Polymerase chain reaction (nested-PCR) was used to amplify DNA fragments from the subunit 18S rRNA gene and indicated 15% positivity; sequencing of amplified fragments was possible for 19 samples. Analysis of the obtained sequences showed that the identified species were Cryptosporidium xiaoi for 15 samples, constituting thus the first molecular characterization study of this Cryptosporidium species in Brazil. Cryptosporidium ubiquitum was identified for three samples and Cryptosporidium meleagridis for one sample; the latter two are considered zoonotic species.


2021 ◽  
Vol 34 (1) ◽  
pp. 242-248
Author(s):  
JOÁLISSON GONÇALVES DA SILVA ◽  
CARLOS HENRIQUE DE BRITO ◽  
ROBÉRIO DE OLIVEIRA ◽  
ELTON LÚCIO ARAÚJO ◽  
KENNEDY SANTOS GONZAGA ◽  
...  

ABSTRACT The objective of this study was to characterize, through faunistic indices, the populations of fruit flies in the Brejo Paraibano microregion and analyze whether these populations are similar to one another. The study was conducted in eight municipalities located in the Agreste Paraibano mesoregion and Brejo Paraibano microregion, Paraíba state, Brazil, where two rural properties of each municipality were selected, georeferenced and identified according to the diversity criterion of fruit species. Each municipality was assumed to have a population of fruit flies with its own characteristics, determined by the faunistic indices of frequency, constancy, dominance, Shannon-Wiener and Margalef diversity indices, as well as evenness. 3.159 specimens of fruit flies were captured, of which 85.57% belonged to the genus Anastrepha and 14.43% to the genus Ceratitis. 11 species of fruit flies were captured in the traps. Anastrepha fraterculus was the most frequent, dominant and constant species, being present in all locations; followed by A. obliqua, A. sororcula and Ceratitis capitata. The studied municipalities have a similarity of 54%, which indicates a high similarity between the areas. Most species captured in the present study occur at low population frequency.


2020 ◽  
Vol 14 (53) ◽  
pp. 718-731
Author(s):  
Ahmed Sameer El Khatib

O surto do novo coronavírus (COVID-19) em Wuhan, China, iniciado em dezembro de 2019, evoluiu para se tornar uma pandemia global. A pandemia, juntamente com o óbvio impacto relacionado à saúde, também representa uma séria ameaça ao bem-estar psicológico dos indivíduos e resultou em mudanças comportamentais significativas. O principal objetivo deste artigo foi descrever a resposta psicocomportamental a esta crise entre a população da região central da cidade de São Paulo, compreendendo os bairros da Bela Vista, Bom Retiro, Cambuci, Consolação, Liberdade, República, Sé e Santa Cecília, no mês de abril de 2020. Um questionário estruturado e autoaplicável foi construído, com base em pesquisas precedentes avaliando o impacto psicológico e as mudanças comportamentais referentes ao novo cenário de Pandemia na cidade de São Paulo. Os questionários foram disponibilizados on-line e foram endereçados a qualquer indivíduo residente nos bairros selecionados, durante abril de 2020. Os dados foram analisados usando o Statistical Package for the Social Sciences (SPSS) versão 21.0 para identificar possíveis riscos fatores para mudanças psicológicas e comportamentais. Foram estudados dados de 400 participantes residentes na região metropolitana de São Paulo. A disseminação do novo vírus resultou no desenvolvimento subsequente de medos na população-alvo estudada, com a maioria dos entrevistados se sentindo ansiosa diariamente (62,5%). Os participantes temiam ir aos mercados (88,8%), preocupavam-se com a saúde de seus familiares (94,5%) e sentiam-se pouco confiantes com as medidas atuais de controle de infecção (71%). Níveis de medo significativamente elevados foram observados entre pessoas com mais de 35 anos de idade. Eles eram mais propensos a temer pela segurança de sua saúde, mesmo em casa (p = 0,06). Enquanto isso, o aumento dos níveis de ansiedade devido ao uso de mídias sociais entre pessoas com menos de 35 anos resultou em comportamentos de fuga (p = 0,04). Houve maior tendência para os graduados temerem pela segurança de sua saúde, mesmo em casa (p 0,01). Além disso, mais de três quartos dos participantes da pesquisa incorporaram mudanças em seu comportamento para garantir sua segurança, ou seja, contato físico reduzido (86,5%) e visitas a unidades de saúde (74,5%), planos cancelados (84,5%) e lavagem das mãos mais frequentemente (87%). Como resultados, houve o aumento dos níveis de ansiedade que um indivíduo experimentava regularmente em relação à sua saúde, à saúde de seus próximos, a certos comportamentos de prevenção como resultado da doença e a mudanças de comportamento da amostra analisada.


1985 ◽  
Vol 63 (9) ◽  
pp. 2194-2206 ◽  
Author(s):  
Lukas H. Margaritis

The eggshell of two fruit flies of economic importance has been studied by means of light and electron microscopy. The eggshell of the olive fruit fly, Dacus oleae, contains compact endochorion, whereas that of the Mediterranean fruit fly, Ceratitis capitata, exhibits a holey endochorionic layer. The eggshells of both species have an innermost chorionic layer which appears to be crystalline in substructure. The anterior pole in each case contains the micropylar canal but in addition it bears an elaborate "cup" in Dacus oleae. Both species exhibit peroxidase activity in most eggshell layers and, as in the case of Drosophila melanogaster, it is thought that the enzyme causes covalent cross-linking of the eggshell proteins producing a resilin-type configuration with rubberlike properties. The above features are related to specific structural functions of the eggshell during fertilization, oviposition, and respiration of the embryo. Biochemical analysis has revealed that the two species have very few eggshell proteins that are similar in molecular weight.


Sign in / Sign up

Export Citation Format

Share Document