Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados PAB (2) Agronomy (1) BABT (1) Bragantia (1) Ciência Rural (1) J. Venom. Anim. Toxins incl. Trop. Dis. (1) Rev. Bras. entomol. (1) Mais... Autor Foerster,Luis Amilton (2) Alves, Sérgio Monteze; Universidade Federal de Minas Gerais (1) Andrade,Galdino (1) Barbosa, Flávia Silva; Universidade Federal de Minas Gerais (1) Berry,Colin (1) Brasil,Carlos (1) Bressan,W. (1) Costa, Cândido Alves da; Universidade Federal de Minas Gerais (1) Cruz,Marcio Ferreira (1) D'Ávila, Vinícius de Abreu; Universidade Federal de Minas Gerais (1) Dias,Daniel Gerhein Souza (1) Falcão,Rosana (1) Figueiredo,J. E. F. (1) Furigo Junior,Agenor (1) Furlan,Sandra Aparecida (1) Gomes,Ana Cristina Menezes Mendes (1) Gomez,M. V. (1) Kalapothakis,E. (1) Leite, Germano Leão Demolin; Universidade Federal de Minas Gerais (1) Litaiff-Abreu,Eleilza (1) Mais... Palavra-chave Bioinsecticide (8) 5.01.02.00-1 Lycopersicon esculentum (1) Aedes aegypti (1) Alternative control (1) Alternative control 5.01.02.02-8 Lycopersicon esculentum (1) Amazonian (1) Araticum (1) Biocontrol (1) Bti (1) Combined process (1) Culex quinquefasciatus (1) Dengue (1) Diamondback moth (1) Entomopathogens (1) Escherichia coli (1) Heterologous expression (1) Marôlo (1) Molecular cloning (1) Phytoinsecticide (1) Residual persistance (1) Mais... Tipo do documento Info:eu-repo/semantics/article (6) Info:eu-repo/semantics/report (1) Pesquisa científica em condições de campo (1) Ano 2017 (1) 2015 (1) 2012 (1) 2011 (2) 2008 (1) 2006 (1) 2005 (1) Mais... País Brazil (8) Idioma Inglês (8)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 8 Primeira ... 1 ... Última Heterologous expression of an insecticidal gene from the armed spider (Phoneutria nigriventer) J. Venom. Anim. Toxins incl. Trop. Dis. Figueiredo,J. E. F.; Kalapothakis,E.; Gomez,M. V.; Bressan,W.. Insect-pests are global problems that cause severe damage to crop plants, and their control is commonly based on chemical insecticides. However, negative effects of pesticides on the environment and human health emphasize the necessity to develop alternative methods for insect-pest control. In the present study, a gene coding for the insecticidal peptide TX4(6-1) of the Brazilian armed spider (Phoneutria nigriventer) was cloned in fusion with maltose binding protein (MBP) and expressed in Escherichia coli. The affinity purified protein MBP-GlyTX4 was cleaved with the Xa factor and used for a bioassay against Spodoptera frugiperda and rabbit immunization. Five micrograms GlyTX4 protein injected into the hemocoel of larvae and abdominal cavity of adults... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioinsecticide; Molecular cloning; Heterologous expression; Escherichia coli; Spodoptera frugiperda. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992008000200006 Effect of Bacillus thuringiensis on microbial functional groups in sorghum rhizosphere PAB Brasil,Carlos; Matsumoto,Leopoldo Sussumu; Nogueira,Marco Antonio; Spago,Flavia Regina; Rampazo,Luís Gustavo; Cruz,Marcio Ferreira; Andrade,Galdino. The objective of this work was to assess the effect of two strains of Bacillus thuringiensis var. kurstaki on sorghum rhizosphere microorganisms. The strains were HD1, that produces the bioinsecticidal protein, and 407, that is a mutant non-producer. The strains do not influence microbial population, but reduce plant growth and improve mycorrhizal colonization and free living fixing N2 community. Tipo: Info:eu-repo/semantics/report Palavras-chave: Bioinsecticide; Sorgum; Rhizosphere; Biocontrol. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000500022 Screening of Bacillus thuringiensis strains effective against mosquitoes PAB Monnerat,Rose Gomes; Dias,Daniel Gerhein Souza; Silva,Silvania Ferreira da; Martins,Erica Soares; Berry,Colin; Falcão,Rosana; Gomes,Ana Cristina Menezes Mendes; Praça,Lilian Botelho; Soares,Carlos Marcelo Silveira. The objective of this work was to evaluate 210 Bacillus thuringiensis strains against Aedes aegypti and Culex quinquefasciatus larvae to select the most effective. These strains were isolated from different regions of Brazil and are stored in a Bacillus spp. collection at Embrapa Recursos Genéticos e Biotecnologia, Brasília, Brazil. The selected strains were characterized by morphological (microscopy), biochemical (SDS-PAGE 10%) and molecular (PCR) methods. Six B. thuringiensis strains were identified as mosquito-toxic after the selective bioassays. None of the strains produced the expected PCR products for detection of cry4, cry11 and cyt1A genes. These results indicate that the activity of mosquitocidal Brazilian strains are not related with Cry4, Cry11... Tipo: Info:eu-repo/semantics/article Palavras-chave: Culex quinquefasciatus; Aedes aegypti; Bioinsecticide. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000200001 Isolation of Bacillus thuringiensis from the state of Amazonas, in Brazil, and screening against Aedes aegypti (Diptera, Culicidae) Rev. Bras. entomol. Soares-da-Silva,Joelma; Pinheiro,Valéria Cristina Soares; Litaiff-Abreu,Eleilza; Polanczyk,Ricardo Antonio; Tadei,Wanderli Pedro. We investigated the use of Bacillus thuringiensis isolated in the state of Amazonas, in Brazil, for the biological control of the dengue vector Aedes aegypti. From 25 soil samples collected in nine municipalities, 484 bacterial colonies were obtained, 57 (11.78%) of which were identified as B. thuringiensis. Six isolates, IBt-03, IBt-06, IBt-07, IBt-28, IBt-30, and BtAM-27 showed insecticidal activity, and only BtAM-27 presents the five genes investigated cry4Aa, cry4Ba, cry10Aa, cry11Aa, and cry11Ba. The IBt-07 and IBt- 28, with lower LC50 values, showed equal toxicity compared to the standards. The isolates of B. thuringiensisfrom Amazonas constitute potential new means of biological control for A. aegypti, because of their larvicidal activity and the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazonian; Bioinsecticide; Dengue; Vector. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000100001 Insecticide effects of Ruta graveolens, Copaifera langsdorffii and Chenopodium ambrosioides against pests and natural enemies in commercial tomato plantation - doi: 10.4025/actasciagron.v33i1.5900 Agronomy Barbosa, Flávia Silva; Universidade Federal de Minas Gerais; Leite, Germano Leão Demolin; Universidade Federal de Minas Gerais; Alves, Sérgio Monteze; Universidade Federal de Minas Gerais; Nascimento, Aline Fonseca; Universidade Federal de Minas Gerais; D'Ávila, Vinícius de Abreu; Universidade Federal de Minas Gerais; Costa, Cândido Alves da; Universidade Federal de Minas Gerais. The aim of this study was to evaluate the insecticide effect of watery leaf extracts of Ruta graveolens (Rutaceae), alcoholic leaf extracts of Copaifera langsdorffii (Caesalpinaceae) and Chenopodium ambrosioides (Chenopodiaceae) in the concentration of 5% under field conditions. The experiment design was randomized blocks with six replications. The parcels treated with plant extracts showed reduction in the population of pests when compared with the control parcels. The extract elaborated with C. langsdorffii presented greater insecticidal effect under Bemisia tabaci (Hemiptera: Aleyrodidae) and sum of pests. It was verified that after 24 hours of spraying, the parcels treated with the extract of C. ambrosioides presented minor numbers of adults of Tuta... Tipo: Pesquisa científica em condições de campo Palavras-chave: 5.01.02.00-1 Lycopersicon esculentum; Bioinsecticide; Alternative control 5.01.02.02-8 Lycopersicon esculentum; Bioinsecticide; Alternative control. Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5900 Annona crassiflora Mart. (Annonaceae): effect of crude extract of seeds on larvae of soybean looper Chrysodeixis includens (Lepidoptera: Noctuidae) Bragantia Massarolli,Angélica; Pereira,Mônica Josene Barbosa; Foerster,Luis Amilton. ABSTRACT The effect of a crude extract of Annona crassiflora was evaluated on larvae of the soybean looper, Chrysodeixis includens (Lepidoptera: Noctuidae) in different stages of larval development. The extract was prepared with seeds of A. crassiflora fruits collected in the state of Mato Grosso, Brazil. The extract was diluted in water and solubilizer agent at the concentrations of 0.5, 1.0, 2.0, 4.0, and 8.0%; it was tested by ingestion of treated leaves and contact. The mortality rate of topically treated caterpillars of first, third, and fifth instars was significantly higher than that of the control group. For first instar caterpillars, mortality was observed within the first 24 h after application, while, for the remaining instars, it was... Tipo: Info:eu-repo/semantics/article Palavras-chave: Araticum; Bioinsecticide; Marôlo; Phytoinsecticide. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300398 Production of bio-inseticide Bacillus thuringiensis var. israelensis in semicontinuous processes combined with batch processes for sporulation BABT Silva,Millena da; Furigo Junior,Agenor; Furlan,Sandra Aparecida; Souza,Ozair. The aim of this work was to study the production of the bioinsecticide using the aerobic cultivation. Two-stage cultivation process was used: aerobic vegetative growth and end-phase of sporulation (with aeration and without aeration). The cuts of working volume evaluated were 20, 40, 60 and 80 %. The highest value of spore concentration (2.17x10(9) CFU/mL) and spore productivity (7.2x10(7) CFU/mL.h) were observed using SP60. The lethal concentration (CL50) obtained through the aeration process and non-aeration process were 0.21 and 0.05 mg/L, respectively. The specific potential of the bioinsecticide produced without aeration (0.025 mg/10-12 CFU) was two times higher than that obtained with aeration (0.05 mg/10-12 CFU). Tipo: Info:eu-repo/semantics/article Palavras-chave: Semicontinuous fermentation; Combined process; Bti; Bioinsecticide. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100006 Toxicity and residual control of Plutella xylostella L. (Lepidoptera: Plutellidae) with Bacillus thuringiensis Berliner and insecticides Ciência Rural Moraes,Carla Pedroso de; Foerster,Luis Amilton. Plutella xylostella L. is the most important worldwide pest of cruciferous plants and indiscriminate use of insecticides has led to the resistance of the species to different groups. This research was conducted to compare the toxicity and persistence of two strains of Bacillus thuringiensis to P. xylostella larvae. Concentrations between 125 and 500g 100L-1 of water of the commercial products were evaluated and compared to the insect growth inhibitor diflubenzuron and to the neurotoxic pyrethroid deltamethrin. The efficacy of the insecticides was compared between treated plants kept indoor greenhouse and outdoor. Third instar larvae were more susceptible to B. thuringiensis than first instar ones. Agree and Dipel showed similar control rates of third... Tipo: Info:eu-repo/semantics/article Palavras-chave: Diamondback moth; Bioinsecticide; Entomopathogens; Residual persistance. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000800001 Registros recuperados: 8 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco