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| Registros recuperados: 20 | |
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| BRAGA, A. G. S.; SOUZA, K. F. A. de; BARBIERI, F. da S.; FERNANDES, C. de F.; ROCHA, R. B.; VIEIRA JUNIOR, J. R.; LACERDA, C. L.; CELESTINO, C. O.; FACUNDO, V. A.; BRITO, L. G.. |
| Estratégias de controle do carrapato dos bovinos, Rhipicephalus microplus, fundamentam-se na utilização de pesticidas. Os principais grupos químicos utilizados atualmente mostram-se ineficazes devido ao surgimento de populações resistentes. A pesquisa de novas moléculas com eficiência acaricida é uma necessidade para manutenção da produtividade dos rebanhos bovinos estabelecidos em regiões de clima tropical. Avaliamos a atividade de Piper tuberculatum para o controle de fêmeas ingurgitadas e larvas de R. microplus através de bioensaios de imersão de adultos e de pacotes de larvas. As concentrações avaliadas foram de 50; 25; 12,50; 6,25; 3,12 e 1,56 mg mL-1 de extrato etanólico de folha, talo e fruto de P. tuberculatum. As concentrações letais para 50% dos... |
| Tipo: Artigo de periódico |
Palavras-chave: Carrapato dos bovinos; Bioensaios; Biomoléculas ativas; Active molecules; Bioassay; Cattle tick; Piperaceae. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1088637 |
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| BRAGA,Andrina Guimarães Silva; SOUZA,Krishna Ferri Alencar de; BARBIERI,Fabio da Silva; FERNANDES,Cleberson de Freitas; ROCHA,Rodrigo Barros; VIEIRA JUNIOR,José Roberto; LACERDA,Clariana Lins; CELESTINO,Caroline Oliveira; FACUNDO,Valdir Alves; BRITO,Luciana Gatto. |
| ABSTRACT The strategies to control the cattle tick, Rhipicephalus microplus are based mainly on the use of synthetic pesticides. However, the emergence, establishment, and development of resistance of ticks is rendering the main chemical groups ineffective. Finding new molecules to effectively control infestations by R. microplus is necessary to maintain the productivity of cattle herds, particularly of taurine breeds established in equatorial and tropical regions of the world. Ethanol extracts from the leaves, stems, and fruits of Piper tuberculatum were evaluated in bioassays at concentrations of 50, 25, 12.50, 6.25, 3.12 and 1.56 mg mL-1. The concentrations lethal to 50% of the individuals (LC50) of tick larvae after 24 hours of exposure were 3.62, 3.99... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle tick; Bioassay; Active molecules; Piperaceae. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000100057 |
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| Freitas-Ribeiro,Gláucia Marques; Furlong,John; Vasconcelos,Viviane Oliveira; Dolinski,Cláudia; Loures-Ribeiro,Alan. |
| Engorged and partially engorged females of Boophilus microplus were exposed to 600; 3,000; 6,000 and 30,000 infective juveniles of Steinernema carpocapsae Weiser, 1955 Santa Rosa and All strains per dish, under lab conditions. Eggs weight, pre-laying period, laying period, survival period, reproductive efficiency rate, percentage of larval eclosion and lethal concentrations of 50% and 90% (CL50 and CL90) were calculated for engorged females. In the case of partially engorged females, only egg weight, survival period and CL50 and CL90 were calculated. All biological parameters of engorged or partially engorged females were altered by exposition of S. carpocapsae infective juveniles (IJs), Santa Rosa and All strains (p<0.05). The increase in the response... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Boophilus microplus; Steinernema carpocapsae; Entomopathogenic nematodes; Cattle tick; Reproduction. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000800007 |
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| DOMINGUES, L. N.; BELLO, A. C. P. P.; CUNHA, A. P.; LEITE, P. V. B.; BARROS, A. T. M. de; LEITE, R. C.. |
| O controle eficaz de Haematobia irritans (mosca-dos-chifres) e Rhipicephalus (Boophilus) microplus (carrapato-do-boi) é um fator crucial à maior rentabilidade da pecuária brasileira, porém ainda constitui-se um desafio. Um maior conhecimento das práticas adotadas no combate destes parasitos faz-se necessário para que se possam estruturar estratégias de controle mais próximas da realidade do produtor rural e mais fáceis de serem executadas. Este estudo caracterizou, através de entrevistas, as práticas adotadas no controle desses ectoparasitos em 23 propriedades da mesorregião do Triângulo Mineiro e Alto Paranaíba, Minas Gerais. A maioria dos entrevistados reconheceu a importância desses parasitos para a atividade pecuária, entretanto, diversos problemas... |
| Tipo: Separatas |
Palavras-chave: Mosca-dos-chifres; Carrapato-do-boi; Entrevistas; Controle parasitário; Horn fly; Cattle tick; Rhipicephalus (Boophilus) microplus interview; Parasite control.; Haematobia Irritans.. |
| Ano: 2012 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/948584 |
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| ANDREOTTI, R.; BARROS, J. C.; GARCIA, M. V.; RODRIGUES, V. da S.; HIGA, L. de O. S.; DUARTE, P. O.; BLECHA, I. M. Z.; BONATTE-JUNIOR, P.. |
| The present study evaluated the behavior of Rhipicephalus microplus naturally infesting Brangus cattle raised with Nellore animals in the municipality of Água Clara, state of Mato Grosso do Sul, Central Brazil. For the field experiment composed of a group with 15 Brangus animals and 15 Nellore animals and a control group with 30 Brangus cattle, all at the post-weaning stage. The 2 groups were kept for 6 months in 2 adjacent paddocks, naturally infested with ticks, at a stocking rate of approximately 0.6 of an animal unit per hectare (AU/ha). Every 18 days, the animals were weighed, and ticks on both sides of each bovine were counted. Every 36 days, blood was collected for hematocrit measurement and molecular diagnosis of the 3 pathogens that cause tick... |
| Tipo: Artigo de periódico |
Palavras-chave: Carrapato-do-boi; Bovine; Cattle tick; Control; Infestation; Bovino; Infestação. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1101878 |
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| BRITO, L. G.; BARBIERI, F. da S.; ROCHA, R. B.; OLIVEIRA, M. C. de S.; RIBEIRO, E. S.. |
| The adult immersion test (AIT) was used to evaluate the efficacy of acaricide molecules used for control of Rhipicephalus microplus on 106 populations collected in five municipalities in the state of Rondônia in the Brazilian South Occidental Amazon region. The analysis of the data showed that the acaricide formulations had different efficacies on the tick populations surveyed. The synthetic pyrethroids (SPs) acaricides were the least effective (48.35–76.84%), followed by SP + organophosphate (OP) associations (68.91–81.47%) and amidine (51.35–100%). For the macrocyclic lactones (MLs), the milbemycin (94.84–100%) was the most effective, followed by spinosad (93.21–100%) and the avermectins (81.34–100%). The phenylpyrazole (PZ) group had similar efficacy... |
| Tipo: Separatas |
Palavras-chave: Cattle tick; Control; Acarides. |
| Ano: 2011 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/890936 |
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| GIACHETTO, P. F.; CUNHA, R. C.; NHANI JUNIOR, A.; GARCIA, M. V.; FERRO, J. A.; ANDREOTTI, R.. |
| The success of cattle tick fixation largely depends on the secretion of substances that alter the immune response of the host. The majority of these substances are expressed by the parasite salivary gland and secreted in tick saliva. It is known that hosts can mount immune responses against ticks and bovine European breeds, and bovine industrial crossbreeds are more susceptible to infestations than are Bos indicus cattle. To identify candidates for the development of novel control strategies for the cattle tick Rhipicephalus (Boophilus) microplus, a salivary gland transcriptome analysis of engorged females fed on susceptible or resistant hosts was performed. Using RNA-Seq, transcriptomes were de novo assembled and produced a total of 235,451 contigs with... |
| Tipo: Artigo de periódico |
Palavras-chave: Bioinformática; Expressão gênica; RNA-Seq; Cattle tick; Host-parasite interaction; Gado de Corte; Carrapato; Sialome; Transcriptome; Cattle; Bioinformatics; Rhipicephalus microplus. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1124241 |
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| GIACHETTO, P. F.; CUNHA, R. C.; NHANI JUNIOR, A.; GARCIA, M. V.; FERRO, J. A.; ANDREOTTI, R.. |
| The success of cattle tick fixation largely depends on the secretion of substances that alter the immune response of the host. The majority of these substances are expressed by the parasite salivary gland and secreted in tick saliva. It is known that hosts can mount immune responses against ticks and bovine European breeds, and bovine industrial crossbreeds are more susceptible to infestations than are Bos indicus cattle. To identify candidates for the development of novel control strategies for the cattle tick Rhipicephalus (Boophilus) microplus, a salivary gland transcriptome analysis of engorged females fed on susceptible or resistant hosts was performed. Using RNA-Seq, transcriptomes were de novo assembled and produced a total of 235,451 contigs with... |
| Tipo: Artigo de periódico |
Palavras-chave: RNA-Seq; Cattle tick; Host-parasite interaction; Sialome; Transcriptome; Cattle. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1119455 |
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| CAMARGO, M. G.; NOGUEIRA, M. R. S.; MARCIANO, A. F.; PERINOTTO, W. M. S.; COUTINHO-RODRIGUES, C. J. B.; SCOTT, F. B.; ANGELO, I. C.; PRATA, M. C. de A.; BITTENCOURT, V. R. E. P.. |
| Abstract Metarril SP Organic is a product based on the fungus Metarhizium anisopliae, which was developed for controlling agricultural pests. The present study evaluated the effect of Metarril SP Organic plus 10% mineral oil, for controlling Rhipicephalus microplus under field conditions. Three groups were formed: Control group, which received no treatment; Oil control group, which was bathed only with water, Tween 80 and mineral oil; and Metarril group, bathed in the oil-based formulation Metarril SP Organic. Two treatments per group were performed and to verify the effect of the treatments, all R. microplus ticks between 4.5 and 8.0 mm in length on the left side of the cattle were counted on days +7, +14 and +21 after each treatment, and a sample of... |
| Tipo: Separatas |
Palavras-chave: Arthropod-pathogenic fungi; Cattle tick; Oil-based formulations.; Biological control.. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1064172 |
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| Registros recuperados: 20 | |
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