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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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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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Influence of dry leaves of common tree and shrub species from southern Chile on the growth of lettuce infected with Meloidogyne hapla Ciencia e Investigación Agraria
Arismendi,Nolberto; Böhm,Laura.
Extracts of many plant species have shown nematicide activity attributable to phytochemicals present in their tissues or formed during a degradation process. Nevertheless, before the application of plant compounds in the field, it is necessary to know their effect on plant hosts. Three concentrations (1, 2.5 and 5% w/w) of dry leaves of Buddleja globosa, Drymis winteri, Eucalyptus globulus, Gevuina avellana, Laurelia sempervirens and Ugni molinae were evaluated on growth parameters (plant height, root length and leaf dry matter) in plants of Lactuca sativa infested with Meloidogyne hapla. Lettuce growth parameters were significantly affected by the interaction between the species and dry leaf tissues concentrations. Drymis winteri showed the biggest...
Tipo: Journal article Palavras-chave: Forestry species; Lactuca sativa; Meloidogyne hapla; Organic amendment; Root-knot nematodes.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100007
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