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| Registros recuperados: 53 | |
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| Lima,Marcileyne Pessôa Leite de; Oliveira,José Vargas de; Barros,Reginaldo; Torres,Jorge Braz. |
| Callosobruchus maculatus (Fabr.) is an important pest in stored cowpea, Vigna unguiculata (L.) Walp., with ample distribution in tropical and subtropical regions. The effect of alternation of cowpea genotypes, susceptible (S) and resistant (R), on the biology of (C. maculatus) was studied after four generations. A no-choice test was carried out in a completely randomized design, factorial scheme, with five treatments, four host combinations (RR, RS, SR and SS) and five replications. Each replication consisted of 30 grains of each genotype infested by two insect couples. The number of eggs per female was not different within or between combinations, evidencing that the genotypes and their alternation did not affect C. maculatus fecundity. Egg viability,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Plant resistance; Antibiosis; Stored cowpea pest. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100005 |
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| Moya,Paulina; Pedemonte,Debora; Amengual,Susana; Franco,Mario E. E; Sisterna,Marina N. |
| "Net blotch" (Drechslera teres) and "Bipolaris spot blotch" (Bipolaris sorokiniana) are foliar diseases of barley. Biological control is currently considered as an efficient alternative to chemical management of these plant diseases. The aim of the present study was to identify 2 isolates of Chaetomium (C2 and C5), endophytics on barley seedlings and to study the in vitro interactions with D. teres and B. sorokiniana, isolated from seeds of the same host. Cultural and morphological characterization of all microorganisms was done. In addition, molecular characterization of Chaetomium spp. was conducted and dual culture tests were carried out to find, by microscopic observations, the effects of the antagonist on the morphology of the pathogens. The results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bipolaris sorokiniana; Chaetomium globosum; Drechslera teres; Antibiosis; Endophyte; Mycoparasitism. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722016000400001 |
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| SOUZA, M. F. C. de; PENTEADO, A. L.; SOUZA, D. R. C. de; QUEIROZ, S. C. do N. de. |
| Resumo: Surtos de doenças bacterianas têm atuado como importante fator limitante para a aquicultura, afetando a sua produção e, como consequência, diminuindo a produtividade. O tratamento dessas doenças é realizado por meio do uso de antibióticos sintéticos. No entanto, esses produtos estão associados ao risco de surgimento de microrganismos resistentes, além de poderem deixar resíduos das substâncias nos peixes, causando riscos potenciais à saúde humana e ao ambiente. Devido a isso, tem surgido a necessidade de realizar pesquisas por alternativas mais saudáveis e sustentáveis. Assim, extratos de plantas e óleos essenciais vêm sendo utilizado como fonte de novas moléculas bioativas. O objetivo desse trabalho foi investigar o potencial antimicrobiano de 31... |
| Tipo: Artigo de periódico |
Palavras-chave: Resistência antimicrobiana; Produtos naturais; Atividade antimicrobiana; Óleos essenciais.; Aquicultura; Peixe; Piscicultura.; Aeromonas hydrophila; Streptococcus agalactiae; Essential oils; Antibiosis. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115692 |
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| MOTA, M. S.; GOMES, C. B.; SOUZA JÚNIOR, I. T.; MOURA, A. B.. |
| This study aimed to evaluate the biocontrol potential of bacteria isolated from different plant species and soils. The production of compounds related to phytopathogen biocontrol and/or promotion of plant growth in bacterial isolates was evaluated by measuring the production of antimicrobial compounds (ammonia and antibiosis) and hydrolytic enzymes (amylases, lipases, proteases, and chitinases) and phosphate solubilization. Of the 1219 bacterial isolates, 92% produced one or more of the eight compounds evaluated, but only 1% of the isolates produced all the compounds. Proteolytic activity was most frequently observed among the bacterial isolates. Among the compounds which often determine the success of biocontrol, 43% produced compounds which inhibit... |
| Tipo: Artigo de periódico |
Palavras-chave: Rizobactéria; Rhizobacteria; Obligate parasites; Perennial plants; Doença de Planta; Antibiosis; Mesocriconema xenoplax. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1119793 |
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| Mota,Monalize Salete; Gomes,Cesar Bauer; Souza Júnior,Ismail Teodoro; Moura,Andréa Bittencourt. |
| Abstract This study aimed to evaluate the biocontrol potential of bacteria isolated from different plant species and soils. The production of compounds related to phytopathogen biocontrol and/or promotion of plant growth in bacterial isolates was evaluated by measuring the production of antimicrobial compounds (ammonia and antibiosis) and hydrolytic enzymes (amylases, lipases, proteases, and chitinases) and phosphate solubilization. Of the 1219 bacterial isolates, 92% produced one or more of the eight compounds evaluated, but only 1% of the isolates produced all the compounds. Proteolytic activity was most frequently observed among the bacterial isolates. Among the compounds which often determine the success of biocontrol, 43% produced compounds which... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhizobacteria; Antibiosis; Mesocriconema xenoplax; Obligate parasites; Perennial plants. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000100062 |
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| SIMON, J. E.; SILVA, E. S. da; MEDEIROS, R. D. de; LIMA, A. C. S.; FIDELIS, E. G.; SILVA, R. O. da; BENDAHAN, A. B.; SCHURT, D. A.. |
| The objective of this study is to evaluate the biological development of the chinch bug, Blissus pulchellus regarding the resistance of the eight forage poaceae. For that, chinch bugs collected from a pasture area, in Boa Vista, Roraima, Brazil, were taken to the Embrapa Roraima Entomology Laboratory for evaluation. The mass breeding of B. pulchellus was carried out in B.O.D., on Urochloa ruziziensis and the biological development evaluation was carried out on eight forage poaceae: Urochloa ruziziensis, U. humidicola, U. brizantha cv. Marandú, U. brizantha cv. Piatã, U. brizantha cv. Paiaguás, Panicum maximum cv. Mombaça, P. maximum cv. Zuri and Andropogon gayanus. The results obtained allowed us to conclude that: a) A. gayanus, P. maximum cv. Zuri and U.... |
| Tipo: Artigo de periódico |
Palavras-chave: Host plant resistance; Insect-pest; Pasture pests; Antibiosis; Poaceae. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1137142 |
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| Vitta,Nancy; Estay,Patricia; Chorbadjian,Rodrigo A. |
| N. Vitta, P. Estay, and Chorbadjian, R.A. 2016. Characterization of resistance expression in genotypes of Solanum Section Lycopersicon against Tuta absoluta (Lepidoptera: Gelechiidae). Cien. Inv. Agr. 43(3):366-373. Two studies were conducted with the aim of characterizing the antixenosis and antibiosis resistance expression of genotypes in the Solanum section Lycopersicon against Tuta absoluta (Meyrick). The species used were S. lycopersicum (Fiorentino, Naomi and Belle), S. habrochaites (RCAT030597, PI126446), S. chilense (INIABB79), S. peruvianum (RCAT031296, RCAT039874 and RCAT030403) and S. pimpinellifolium (PI390739). For the antixenosis bioassay, a leaf was removed from plants of each genotype and placed in a cup with a floral foam soaked in water.... |
| Tipo: Journal article |
Palavras-chave: Antibiosis; Antixenosis; Host plant resistance; Insect-plant interactions; Tomato. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000300003 |
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| Esparza Luna, Linda Luz. |
| Se aislaron cepas nativas de Trichoderma spp. y Phytophthora parasitica en suelos cultivados con jamaica y con alta incidencia de la enfermedad “pata prieta de la jamaica”. La toma de muestras de suelo se ubicó en los municipios de Tecoanapa, Ayutla de los Libres, San Marcos y Juan R. Escudero del estado de Guerrero. Las cepas patogénicas se aislaron de tallo y raíz enfermo con síntomas evidentes de “pata prieta”. Trichoderma spp. se aisló directamente de suelo mediante el método de dilución de esporas en cajas Petri con el medio de cultivo Papa dextrosa agar. Se obtuvieron tres cepas de P. parasitica y 15 cepas de Trichoderma, correspondiendo a las siguientes especies, 8 a T. asperellum, 3 a T. harzianum, 1 a T. virens, 1 a T. inhamatum, 1 a... |
| Tipo: Tesis |
Palavras-chave: Antagonismo; Antibiosis; Trichoderma spp; Phytophthora parasitica; Jamaica antangonism; Antibiotic; Trichoderma spp.; P. parasitica; Jamaica. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1029 |
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| Esparza Luna, Linda Luz. |
| Se aislaron cepas nativas de Trichoderma spp. y Phytophthora parasitica en suelos cultivados con jamaica y con alta incidencia de la enfermedad “pata prieta de la jamaica”. La toma de muestras de suelo se ubicó en los municipios de Tecoanapa, Ayutla de los Libres, San Marcos y Juan R. Escudero del estado de Guerrero. Las cepas patogénicas se aislaron de tallo y raíz enfermo con síntomas evidentes de “pata prieta”. Trichoderma spp. se aisló directamente de suelo mediante el método de dilución de esporas en cajas Petri con el medio de cultivo Papa dextrosa agar. Se obtuvieron tres cepas de P. parasitica y 15 cepas de Trichoderma, correspondiendo a las siguientes especies, 8 a T. asperellum, 3 a T. harzianum, 1 a T. virens, 1 a T. inhamatum, 1 a... |
| Tipo: Tesis |
Palavras-chave: Antagonismo; Antibiosis; Trichoderma spp; Phytophthora parasitica; Jamaica; Maestría; Fitopatología; Antangonism; Antibiotic; Jamaica. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/1357 |
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| CRUZ, I.; VENDRAMIM, J. D.. |
| Avaliou-se o efeito de 28 genotipos resistentes de sorgo, S.bicolor (L.) sobre a biologia do pulgao-verde, S.graminum Rond., biotipo C. Os experimentos foram conduzidos no Centro Nacional de Pesquisa de Milho e Sorgo da EMBRAPA, em Sete Lagoas, MG. Os genotipos foram semeados em vasos e individualmente infestados aos 11 dias de idade com uma ninfa recem-nascida por planta e em seguida, foram cobertos com uma gaiola cilindrica. A avaliacao foi baseada no numero de instares, periodos pre-reprodutivo e reprodutivo, ciclo total, numero de ninfas produzido e peso dos insetos (quatro e oito dias de idade). Os genotipos IS 2293, GR, TX 2567, IS 3422, GSBTX 399 x Capbam, TX 430 x GR, S 9750, H 8012 e GB 3 afetaram adversamente a biologia do inseto, aumentando o... |
| Tipo: Artigo de periódico |
Palavras-chave: Antibiose; Plantas; Insertos; Host plant resistance.; Resistência.; Antibiosis; Insecta; Insects.. |
| Ano: 1995 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/474558 |
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| Banhos,Elissandro Fonseca dos; Souza,Antonia Queiroz Lima de; Andrade,Juliano Camurça de; Souza,Afonso Duarte Leão de; Koolen,Hector Henrique Ferreira; Albuquerque,Patrícia Melchionna. |
| Beneficial interactions between plants and microorganisms have been investigated under different ecological, physiological, biochemical, and genetic aspects. However, the systematic exploration of biomolecules with potential for biotechnological products from this interaction still is relatively scarce. Therefore, this study aimed the evaluation of the diversity and antimicrobial activity of the endophytic fungi obtained from roots, stems and leafs of Myrcia guianensis (Myrtaceae) from the Brazilian Amazon. 156 endophytic fungi were isolated and above 80% were identified by morphological examination as belonging to the genera Pestalotiopsis, Phomopsis, Aspergillus, Xylaria, Nectria, Penicillium and Fusarium. Fermented broth of those fungi were assayed for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Secondary metabolites; Fungus/plant interaction; Antibiosis; Amazonian endophytic fungi. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100021 |
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| Registros recuperados: 53 | |
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