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| Registros recuperados: 69 | |
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| Ayala Torres, Ana María. |
| Un total de 129 aislamientos bacterianos obtenidos de la micósfera de esclerocios de Claviceps gigantea se evaluaron in vitro para determinar su capacidad de inhibir el crecimiento de Fusarium graminearum, F. subglutinans y F. verticillioides patógenos a maíz. Ensayos cualitativos en confrontación dual, resultaron en la selección de 22 aislamientos bacterianos con el mayor potencial antagónico hacia una, dos o las tres especies de Fusarium. Los aislamientos se identificaron molecularmente mediante secuenciación parcial del gen 16s ADNr. Las cepas con mayor grado de antagonismo pertenecen a los géneros Bacillus y Pseudomonas. La caracterización en la producción de metabolitos potencialmente involucrados en la actividad antagónica, mostró que el 100% de las... |
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Palavras-chave: Bacillus; Pseudomonas; Biocontrol; Metabolitos secundarios; Caracterización; Secondary metabolites; Characterization; Fitopatología; Maestría. |
| Ano: 2014 |
URL: http://hdl.handle.net/10521/2299 |
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| Aguilar Marcelino, Liliana. |
| La presente investigación tuvo como objetivo general evaluar la actividad antagónica de microorganismos con uso potencial contra el parásito de ovinos Haemonchus contortus. Esta investigación constó de cuatro estudios. En el primer estudio se obtuvo e identificó morfológica y molecularmente el aislamiento de una bacteria a partir de nematodos fitopatógenos. Los resultados obtenidos del análisis molecular mostraron un 95% de similitud con la región 16S rRNA de la bacteria Comamonas aquatica. A pesar de que los iniciadores utilizados en el presente estudio fueron específicos para Pasteuria-like, los antecedentes de esta bacteria al parecer no tienen relación con ninguna actividad antagónica en contra de nematodos; y regularmente no produce esporas. Por lo... |
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Palavras-chave: Control biológico; Pasteuria-like; Lasioseius penicilliger; Butlerius; Duddingtonia flagrans; Haemonchus contortus; Biocontrol; Doctorado; Ganadería. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/713 |
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| Aguilar Marcelino, Liliana. |
| La presente investigación tuvo como objetivo general evaluar la actividad antagónica de microorganismos con uso potencial contra el parásito de ovinos Haemonchus contortus. Esta investigación constó de cuatro estudios. En el primer estudio se obtuvo e identificó morfológica y molecularmente el aislamiento de una bacteria a partir de nematodos fitopatógenos. Los resultados obtenidos del análisis molecular mostraron un 95% de similitud con la región 16S rRNA de la bacteria Comamonas aquatica. A pesar de que los iniciadores utilizados en el presente estudio fueron específicos para Pasteuria-like, los antecedentes de esta bacteria al parecer no tienen relación con ninguna actividad antagónica en contra de nematodos; y regularmente no produce esporas. Por lo... |
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Palavras-chave: Control biológico; Pasteuria-like; Lasioseius penicilliger; Butlerius; Duddingtonia flagrans; Haemonchus contortus; Biocontrol; Doctorado; Ganadería. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/713 |
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| Robeson,James; Turra,Gabriel; Huber,Karen; Borie,Consuelo. |
| Background Lytic bacteriophages are bacterial viruses that upon infection kill their host cells and therefore have re-emerged as biological control agents of bacterial pathogens, particularly in the field of food related infections. Here, we investigated the stability in different food matrices of five phage isolates capable of controlling the foodborne pathogen Salmonella enterica serovar Enteritidis (SE). Results We found that two phages, originally isolated from food sources, were up to 5 logs more stable than three phages isolated from sewage, in ten food matrices (fresh and processed) at both 4°C and 18°C. Conclusion Lytic phages isolated from contaminated food sources seem to be a better choice when structuring phage cocktails to be used in the... |
| Tipo: Journal article |
Palavras-chave: Biocontrol; Foodstuffs; Phage. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000400008 |
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| Fernandez-Triana, J.; Beaudin, M.; Achterberg, K. van; Agbodzavu, M.K.; Othim, S.T.O.; Nyamu, F.W.; Fiaboe, K.K.M.. |
| The microgastrine parasitoid wasp Apanteles hemara Nixon, 1965, is currently being considered as a potential biocontrol agent of amaranth leaf-webber pests in Africa. To facilitate future research and identification of the species, we characterize it from an integrative taxonomy perspective by providing a comprehensive morphological redescription, extensive illustrations (including the first images of the holotype), DNA barcodes, wasp biology, host data (Choreutidae and Crambidae caterpillars), and updated geographical distribution of the species (including eight new country records). Despite a wide distribution across four major biogeographical regions (mostly within the Old World tropics), the species seems to be relatively uniform from a molecular and... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Microgastrinae; Amaranthus; Biocontrol; DNA barcode; Geographical distribution; Africa. |
| Ano: 2017 |
URL: http://www.repository.naturalis.nl/record/643636 |
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| Sosa-Gómez,Daniel R.; Delpin,Katiaíres E.; Moscardi,Flávio; Nozaki,Márcia de H.. |
| The fungus Nomuraea rileyi (Farlow) Samson is one of the most important natural enemies of soybean caterpillars, mainly under humid weather conditions. Outbreaks of the fungus Microsphaera diffusa Cooke & Peck have demanded fungicide applications on soybeans, which could result in outbreaks of noctuid populations by reduction of the natural inocula of N. rileyi. The recommended fungicides have shown to be detrimental to beneficial fungi, reducing infection, delaying epizootics, and resulting in increased host population densities. In laboratory assays, benomyl, difenoconazole, sulphur and carbendazim affected conidial germination of N. rileyi, being the latter less deleterious. To assess the impact of fungicides used to control M. diffusa, on N.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Entomopathogenic fungi; Difenoconazole; Benomyl; Carbendazim; Microsphaera diffusa; Biocontrol. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000200014 |
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| Marchiori,Carlos H.; Caldas,Elza R.; Almeida,Katia G.S.. |
| The succession of Scarabaeidae in cattle dung deposited in pasture were observed from January to August 2001 in Itumbiara County, State of Goiás, Brazil (18º25'S; 49º13'W). Fresh cattle dung pats were exposed on a pasture area for one, two, three, four, five, six, seven, eight, nine and ten days and then taken individually to the laboratory for screening and identification of the Scarabaeidae therein present. A total of 100 dung pads were exposed in the field from which 3,229 specimens of Scarabaeidae were recovered. The most frequent species found were: Ataenius aequalis Harold and Aphodius lividus Balth. The majority of specimens were collected in cattle dung exposed for one and two days. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arthropoda; Coleoptera; Bovine; Biocontrol. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000100029 |
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| 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 |
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| Melo,Débora Ferreira; Mello,Sueli Corrêa Marques de. |
| The objective of this work was to set up ideal conditions for conidia mass production of Dicyma pulvinata. Four isolates were compared in terms of their growth and conidia production on various substrates (grains of parboiled rice, common rice, maize and wheat, besides chipped maize and rice husk), temperatures (19, 22, 25, 28 and 31ºC), growth containers (aluminum trays, polypropylene bags and Erlenmeyers) and light regimes (continuous darkness, 6 and 12 hours of light/darkness, and continuous light). Temperature effects on conidia germination capacity were also evaluated. The experiments were done in randomized complete block designs, in factorial arrangements (isolates x treatments - substrates, containers, temperatures and light regimes), with four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microcyclus ulei; Biocontrol; Biofungicide; Leaf blight; Rubber tree. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001000004 |
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| Robles-Hernández,L; Hernández-Huerta,J; González-Franco,AC; Hernández-Rodríguez,OA; Núñez-Barrios,A; Pérez-Leal,R. |
| El chile es uno de los principales cultivos de importancia económica en México, y la marchitez causada por Fusarium es una de las enfermedades que limitan su producción. Además, el uso inadecuado de los agroquímicos en el cultivo generan problemas ambientales y de salud. Por ésto, en este estudio se evaluó la efectividad de Streptomyces sp. PRIO41 como agente de biocontrol de Fusarium spp. y como promotor del crecimiento de plantas de chile. Para ello, se determinó in vitro la patogenicidad y virulencia de Fusarium spp. en semillas de chile jalapeño, así como la interacción de los aislados fúngicos con Streptomyces sp. PRIO41 bajo 2 condiciones nutricionales. Finalmente, en invernadero se evaluó la efectividad de Streptomyces PRIO41 como (1) biocontrol de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Actinobacteria; Biofertilizante; Agente antifúngico; Biocontrol. |
| Ano: 2015 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000200001 |
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| Hernández-Castillo,FD; Aguirre-Aguirre,Adalberto; Lira-Saldivar,RH; Guerrero-Rodríguez,E; Gallegos-Morales,G. |
| Mediante experimentos de laboratorio e invernadero se analizó la bioeficacia de cinco cepas de Bacillus spp.; de la mezcla de los bioproductos quitosan y extracto de Larrea tridentata, así como de cinco funguicidas sintéticos contra el hongo Alternaria dauci Kühn. Además, se determinó el efecto de estos compuestos en el crecimiento del cultivo de zanahoria. Los resultados obtenidos mostraron que las cepas de la bacteria Bacillus (B3, B9, B15 y la combinación de éstas), así como la mezcla quitosan- Larrea estimularon el desarrollo de la zanahoria, ya que ésta alcanzó mayor grosor, longitud y peso, con respecto al testigo y a los demás tratamientos. La cepa B3 resultó ser la que más promovió el crecimiento de zanahoria, ya que reportó valores superiores en... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacillus subtilis; Biocontrol; Quitosan; Daucus carota; Larrea tridentata. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572006000100009 |
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| Robeson,J; Retamales,J; Borie,C. |
| Salmonella enterica serovar Enteritidis (SE) is a prevalent gastrointestinal pathogen worldwide, threatening both animal and human health. In the latter, disease is associated to the consumption of SE-contaminated products from the poultry industry. The control of SE infection is largely based on the use of antibiotics and vaccines, but the use of lytic bacteriophages is re-emerging as an additional strategy for SE control. In fact, a number of recent reports point to the adequacy of bacteriophage as an efficient prophylactic or therapeutic countermeasure to SE infections. However, less attention has been focused on the basic biology of these bacteriophages. Here we report on three bacteriophages (f18, IF1 and EST2) that share a common viral particle... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteriophages; Biocontrol; Salmonella Enteritidis. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000300007 |
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| Atwa,Atwa A.; Bilgrami,Anwar L.; Al-Saggaf,Ahmad I.M.. |
| ABSTRACT During the present study, the host-parasite relationship between mosquitoes and parasitic mites was investigated. The 8954 individuals of male and female mosquitoes belonging to 26 genera: seven each of Aedes and Culex, six of Anopheles and one each of Toxorhynchites, Coquillettidia and Uranotaenia were collected from 200 sites. The male and female mosquitoes were collected from the State of Uttar Pradesh, located at 26.8500° N, 80.9100° E in North India by deploying Carbon dioxide-baited and gravid traps. The intensity of mite's infection, type and number of mites attached to mosquitoes, mite's preference for body parts and host sexes were the parameters used to determine host-parasite relationship. Eight species of mites: Arrenurus acuminatus,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mosquito; Mites; Host; Parasite; Infection; Biocontrol. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262017000200101 |
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| Paz,Dannielle Silva Da; Araujo,José Ribamar Gusmão; Rodrigues,Antônia Alice Costa; Silva,Erlen Keila Candido e; Diniz,Nathália Bandeira. |
| ABSTRACT Papaya target-spot, caused by fungus Corynespora cassiicola presents a wide geographic distribution, causing leaf spots in several hosts. The aim of this research was to evaluate the behavior of papaya varieties and/or selections to the natural occurrence of target spot, and test the fungi toxic effect of neem, citronella and eucalyptus extracts, and fungi static effects of Bacillus isolates on the fungus C. cassiicola in vitro. To evaluate the natural occurrence of the disease in field, symptoms on leaves of 11 papaya varieties and/or selections have been assessed. The pathogenicity of isolates was verified by inoculation of plants in greenhouse. Neem, citronella and eucalyptus extracts were prepared at concentrations of 10, 15 and 20% and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya L.; Azadirachta indica; Cymbopogon nardus; Biocontrol; Target spot. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000100405 |
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| Registros recuperados: 69 | |
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