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Determinación de Especies de Erwinia (grupo carotovora) como Agentes Causales de “Pudrición Blanda” en Cala (Zantedeschia spp.) Agricultura Técnica
Kunstmann,Juan Pablo; Ciampi,Luigi; Böhm,Laura; Barrera,Sylvia; Collado,Luis.
Durante la temporada 2002 se realizó una investigación para establecer los agentes causantes de pudriciones húmedas en tallos y túberos de cala (Zantedeschia spp.) provenientes de producciones bajo invernadero en el Sur de Chile. Para comparar con cepas locales se realizaron aislamientos a partir de tubérculos de papa (Solanum tuberosum L.) obtenidas de una producción comercial cerca de la ciudad de Valdivia. Para analizar las diferencias en virulencia, las cepas de papa fueron inoculadas sobre cala y vice versa. De los aislamientos bacterianos obtenidos se determinaron 33 pertenecientes al género Erwinia (grupo carotovora)(E.c.) de acuerdo a las siguientes características: Gram (-), oxidasa (-) y pudrición de rodajas de papa (+). Pruebas complementarias y...
Tipo: Journal article Palavras-chave: Erwinia; Pudrición húmeda; Cala.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072006000300003
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Isolation and partial purification of a metabolite from a mutant strain of Bacillus sp. with antibiotic activity against plant pathogenic agents Electron. J. Biotechnol.
Bernal,Giuliano; Illanes,Andrés; Ciampi,Luigi.
The use of microorganisms for biological purposes has become an effective alternative to control plant pathogens. There are many examples of formulations using bacterial or fungal strains with biocontrol applications. Among them, members of the genus Bacillus are well known antibiotic producers. However, the increased capacity of antibiotic production obtained by direct mutagenesis of wild strains, has seldom been reported in the open literature. This research refers to the mutation of the A47 Bacillus strain, a plant pathogen antagonist, in order to obtain an improved strain with enhanced capacity to synthesize metabolites with antibiotic activity. The mutant strain M40 was obtained using the mutagenic agent acridine orange. The mutant strain showed a...
Tipo: Journal article
Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582002000100008
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Nematicidal activity of leaves of common shrub and tree species from Southern Chile against Meloidogyne hapla Ciencia e Investigación Agraria
Böhm,Laura; Arismendi,Nolberto; Ciampi,Luigi.
The biological control of the root-knot nematode, Meloidogyne hapla , was evaluated through the addition of organic amendments of dry and chopped leaves of Buddleia globes, Dramas winter, Eucalyptus globules, Genuine aflame, Aurelia sempervirens, huma apiculata, Maytenus boaria and Ugni molinae to the soil substratum. The assays were carried out in pots seeded with lettuce plants (cv. Reina de Mayo). All pots were inoculated with 2000 eggs and juveniles of M. hapla, and then maintained under greenhouse conditions for 45 days. Control pots without foliage additions were also seeded with lettuce. The results show that the addition of dry leaves of L. sempervirens, G. avellana, M. boaria, D. winteri , and B. globosa significantly reduced root-knot nematode...
Tipo: Journal article Palavras-chave: Biological control; Forestry species; Meloidogyne hapla; Nematodes; Organic-amendment; Ligneous plants.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000200009
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Patología Vegetal Micológica Ciencia e Investigación Agraria
Ciampi,Luigi; Radie,Sergio; Alvarez,Eduardo.
Tipo: Journal article
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202007000200010
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