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Lactic acid bacteria increase the resistance of turbot larvae, Scophthalmus maximus, against pathogenic vibrio ArchiMer
Gatesoupe, Fj.
Characteristics of Lactic Acid Bacteria (LAB) isolated from rotifers, Brachionus plicatilis, resembled those of Lactobacillus plantarum or Carnobacterium sp. It was investigated whether the artificial maintenance of a high concentration of LAB in rotifers might increase their dietary value for turbot larvae, particularly when the fish were infected with pathogenic Vibrio sp. One LAB strain was cultivated, then introduced daily into the enrichment medium of rotifers. In this way, LAB were retrieved in large amounts in turbot, and a significant limitation of larval mortality rate was observed when turbot were challenged with pathogenic vibrio at day 9. The inoculum concentration of LAB had a decisive effect on survival rate, and the optimum was between 10(7)...
Tipo: Text Palavras-chave: LACTIC ACID BACTERIA; VIBRIO; PATHOGEN; ROTIFER; EXPERIMENTAL INFECTION; LARVAL FISH CULTURE; TURBOT; PLEURONECTIFORMES.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00065/17672/15200.pdf
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Mortality of the honey bee, Apis mellifera, in colonies treated with certain biological insecticides National Institute of Agronomic Research
Cantwell, George E.; Knox, David A.; Lehnert, Thor; Michael, A.S..
Candidate insect pathogens were fed at various levels to honey bees (Apis mellifera) either in small cages or in observation hives. The pathogens tested included two polyhedrosis viruses, a granulosis virus, a commercial preparation of Bacillus thuringiensis var. thuringiensis, spores, crystals, and the exotoxin of this variety, plus the crystals of varieties alesti and sotto. No mortality was recorded as a result of treatment with any of these pathogens except with the highest level of the exotoxin of B. thuringiensis.
Tipo: Journal Article-postprint Palavras-chave: HONEYBEE; APIS MELLIFERA; APIDAE; HYMENOPTERA; SOCIAL INSECT; MORTALITY; BIOLOGICAL INSECTICIDE; BIOLOGICAL CONTROL; PATHOGEN; EXOTOXIN; BACILLUS THURINGIENSIS VAR. THURINGIENSIS; ABEILLE DOMESTIQUE; INSECTE SOCIAL; MORTALITE; INSECTICIDE BIOLOGIQUE; LUTTE BIOLOGIQUE; AGENT PATHOGENE; EXOTOXINE; BACILLUS THURINGIENSIS VAR . THURINGIENSIS.
Ano: 1966 URL: http://hdl.handle.net/2174/369
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The influences of forest stand management on biotic and abiotic risks of damage Inra
Jactel, H.; Nicoll, B. C.; Branco, M.; Gonzalez-Olabarria, J. R.; Grodzki, W.; Långström, B.; Moreira, F.; Netherer, S.; Orazio, C.; Piou, D.; Santos, H.; Schelhaas, M. J.; Tojic, K.; Vodde, F..
•  Cette revue bibliographique s'intéresse aux effets de la sylviculture sur la sensibilité des peuplements forestiers aux principaux agents de dégâts biotiques et abiotiques que sont les mammifères herbivores, les insectes ravageurs, les champignons pathogènes, le feu et les vents forts.• Les pratiques forestières analysées sont la sélection et la préparation des sites de reboisement, la définition de la composition en essences et le choix du matériel génétique, les méthodes de régénération et d'entretien, les modalités d'éclaircie et d'élagage, le mode de récolte finale. L'influence de chacune de ces opérations sur l'occurrence des agents de dégâts biotiques et abiotiques et sur la sensibilité des peuplements est examinée ainsi que les processus...
Tipo: Journal Article Palavras-chave: PEUPLEMENT FORESTIER; PRATIQUE FORESTIÈRE; ENNEMI NATUREL; DÉGÂT SANITAIRE; PEUPLEMENT; SENSIBILITÉ; HERBIVORES; PATHOGÈNES; VENT; FEU SILVICULTURE; STAND; OCCURRENCE; SUSCEPTIBILITY; PEST; PATHOGEN; WIND; FIRE.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009294d2729&uri=/notices/prodinra1/2009/12/
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Ulteriori isolamenti di attinomiceti dall'apparato digerente di api sane e di api malate da forma di "Mal nero" National Institute of Agronomic Research
Amici, Alba maria; Vecchi, Maria Adelaide.
Following preceding papers on the isolation of some Actinomycetes strains in the digestive tract of bees affected with a particular type of "Black disease", the AA. have investigated their presence in healthy bees, as this kind of organisms had never been detected before in the digestive tract. Healthy and sick bees taken from two hives of a same apiary, one normal and the other affected with « Black disease » for 3 years and presenting a considerable and constant mortality, were examined. Actinomycetes were isolated from the healthy as well as from the sick bees. The AA. conc1ude that Actinomycetes are not responsible for « Black disease» for the following reasons: I) Actinomycetes are present in healthy and sick bees in practically the same percentage....
Tipo: Journal Article-postprint Palavras-chave: HONEYBEE; APIS MELLIFERA; APIDAE; HYMENOPTERA; SOCIAL INSECT; FUNGI; PATHOGEN; ACTINOMYCETE; CHRONIC PARALYSIS; DIGESTIVE TRACT; ABEILLE DOMESTIQUE; INSECTE SOCIAL; CHAMPIGNON PATHOGENE; ACTINOMYCETE; MALADIE NOIRE; PARALYSIE CHRONIQUE; APPAREIL DIGESTIF.
Ano: 1958 URL: http://hdl.handle.net/2174/467
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