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University of the Basque Country, Euskal Herriko Unibertsitatea
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Leaf Spot Diseases of wheat (Triticum aestivum L.) are one of the most destructive diseases of th... more Leaf Spot Diseases of wheat (Triticum aestivum L.) are one of the most destructive diseases of this crop in Argentina. No single control measure is likely to be successful in controlling leaf spotting pathogens and a fully integrated system of disease management is more likely to achieve a long-term solution. Part of such a system could include biological control. The CIDEFI has been conducting an extensive investigation about biological control focusing on these diseases since 1990s. A step-wise screening system to select fungi with potential to control these diseases were initially developed. Aspergillus niger, Epicoccum purpurascens, Fusarium moniliforme var. anthophylium, Penicillium sp. and Bacillus sp. induced changes that included micelial growth inhibition, coiling, vacuolation, granulation and plasmolysis of hyphae. Bacillus and others spore-forming bacteria revealed interesting possibilities for biocontrol. Several Trichoderma spp. tested suppressed the diseases in vitro and under greenhouse conditions suggesting that the protective characteristics may be associated with the ability to compete for nutrients and for occupation of the infection court in the pre-penetration period. New projects recently initiated at CIDEFI aims strategies for consistent biological control implemented under field conditions. In this sense, several strains showed promising are currently being assessed in small scale field trails. The need for more integrative, multidisciplinary research on agricultural systems that will provide a deeper understanding of the conditions under which microbial biocontrol agents might be most productively applied are required.
Hodowla Roślin, Aklimatyzacja i Nasiennictwo, 1994
Agronomie, 1993
— Plants of Urtica urens L (annual nettle) showing symptoms of severe foliar necrosis were ... more — Plants of Urtica urens L (annual nettle) showing symptoms of severe foliar necrosis were collected in the horticultural belt of the city of La Plata (Province of Buenos Aires, Argentina). The agent causing the disease was identified as Septoria urticae Rob et Desm. Due to the severe lesions caused by the pathogen, its potential as a biocontrol agent of U urens was studied. Routine phytopathological techniques were used in order to evaluate the bioherbicide potential of the pathogen in the greenhouse on plants of U urens and other species of the Urticaceae family, such as Boehmeria nivea (L) Gaud, Pilea cadierei Gagn et Guil and Parietaria officinalis L. Using variance analysis it was shown that the pathogen caused a high percentage of defoliation and a reduction in dry weight (DW) of nettle plants, apart from significantly diminishing the seed production (number and DW) in the greenhouse. B nivea and P cadierei did not show any symptoms of the disease, whereas P officinalis was slightly affected by the fungus. This study suggests that the pathogen could play an important role as a biocontrol agent since it reduces U urens production. Septoria urticae / Urtica urens / biological control / bioherbicide Résumé — Évaluation préliminaire de Septoria urticae Rob et Desm comme agent de contrôle biologique de Urtica urens L. Des plantes de Urtica urens montrant des symptômes de nécrose foliaire sévère ont été ramassés dans la ceinture horticole de la ville de La Plata (Province de Buenos Aires, Argentina). L'agent qui cause la maladie a été identifié comme Septoria urticae Rob et Desm. À cause des lésions sévères provoquées par le pathogène, on a étudié son efficacité comme agent de lutte biologique contre U urens. Des techniques phytopathologiques de routine ont été employées pour évaluer le potentiel bioherbicide du pathogène en serre sur des plantes de U urens et d'autres espèces de la famille Urticaceae, telles que Boehmeria nivea (L) Gaud, Pilea cadierei Gagn et Guill et Parietaria officinalis L. L'analyse de variance a montré que le pathogène a causé un haut pourcentage de défoliation et une réduction du poids sec (DW) de plantes d'ortie, en plus d'une diminution significative de la production de semences en serre. B nivea et P cadierei n'ont pas montré de symptômes de la maladie, tandis que P officinalis a été légèrement affecté par le champignon. Cette étude suggère que le pathogène pourrait jouer un rôle important comme agent de biocontrôle, parce qu'il réduit la production de U urens.
Seed borne diseases ecofriendly management , Seed borne diseases ecofriendly management , مرکز فن... more Seed borne diseases ecofriendly management , Seed borne diseases ecofriendly management , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
RIA, Revista de Investigaciones Agropecuarias, 2005
Revista De La Facultad De Agronomia De La Universidad Del Zulia, 1991
Uso de Trichoderma spp para el control biológico de enfermedades de las plantas
Horticultura global, 2012
Leaf Spot Diseases of wheat (Triticum aestivum L.) are one of the most destructive diseases of th... more Leaf Spot Diseases of wheat (Triticum aestivum L.) are one of the most destructive diseases of this crop in Argentina. No single control measure is likely to be successful in controlling leaf spotting pathogens and a fully integrated system of disease management is more likely to achieve a long-term solution. Part of such a system could include biological control. The CIDEFI has been conducting an extensive investigation about biological control focusing on these diseases since 1990s. A step-wise screening system to select fungi with potential to control these diseases were initially developed. Aspergillus niger, Epicoccum purpurascens, Fusarium moniliforme var. anthophylium, Penicillium sp. and Bacillus sp. induced changes that included micelial growth inhibition, coiling, vacuolation, granulation and plasmolysis of hyphae. Bacillus and others spore-forming bacteria revealed interesting possibilities for biocontrol. Several Trichoderma spp. tested suppressed the diseases in vitro and under greenhouse conditions suggesting that the protective characteristics may be associated with the ability to compete for nutrients and for occupation of the infection court in the pre-penetration period. New projects recently initiated at CIDEFI aims strategies for consistent biological control implemented under field conditions. In this sense, several strains showed promising are currently being assessed in small scale field trails. The need for more integrative, multidisciplinary research on agricultural systems that will provide a deeper understanding of the conditions under which microbial biocontrol agents might be most productively applied are required.
Hodowla Roślin, Aklimatyzacja i Nasiennictwo, 1994
Agronomie, 1993
— Plants of Urtica urens L (annual nettle) showing symptoms of severe foliar necrosis were ... more — Plants of Urtica urens L (annual nettle) showing symptoms of severe foliar necrosis were collected in the horticultural belt of the city of La Plata (Province of Buenos Aires, Argentina). The agent causing the disease was identified as Septoria urticae Rob et Desm. Due to the severe lesions caused by the pathogen, its potential as a biocontrol agent of U urens was studied. Routine phytopathological techniques were used in order to evaluate the bioherbicide potential of the pathogen in the greenhouse on plants of U urens and other species of the Urticaceae family, such as Boehmeria nivea (L) Gaud, Pilea cadierei Gagn et Guil and Parietaria officinalis L. Using variance analysis it was shown that the pathogen caused a high percentage of defoliation and a reduction in dry weight (DW) of nettle plants, apart from significantly diminishing the seed production (number and DW) in the greenhouse. B nivea and P cadierei did not show any symptoms of the disease, whereas P officinalis was slightly affected by the fungus. This study suggests that the pathogen could play an important role as a biocontrol agent since it reduces U urens production. Septoria urticae / Urtica urens / biological control / bioherbicide Résumé — Évaluation préliminaire de Septoria urticae Rob et Desm comme agent de contrôle biologique de Urtica urens L. Des plantes de Urtica urens montrant des symptômes de nécrose foliaire sévère ont été ramassés dans la ceinture horticole de la ville de La Plata (Province de Buenos Aires, Argentina). L'agent qui cause la maladie a été identifié comme Septoria urticae Rob et Desm. À cause des lésions sévères provoquées par le pathogène, on a étudié son efficacité comme agent de lutte biologique contre U urens. Des techniques phytopathologiques de routine ont été employées pour évaluer le potentiel bioherbicide du pathogène en serre sur des plantes de U urens et d'autres espèces de la famille Urticaceae, telles que Boehmeria nivea (L) Gaud, Pilea cadierei Gagn et Guill et Parietaria officinalis L. L'analyse de variance a montré que le pathogène a causé un haut pourcentage de défoliation et une réduction du poids sec (DW) de plantes d'ortie, en plus d'une diminution significative de la production de semences en serre. B nivea et P cadierei n'ont pas montré de symptômes de la maladie, tandis que P officinalis a été légèrement affecté par le champignon. Cette étude suggère que le pathogène pourrait jouer un rôle important comme agent de biocontrôle, parce qu'il réduit la production de U urens.
Seed borne diseases ecofriendly management , Seed borne diseases ecofriendly management , مرکز فن... more Seed borne diseases ecofriendly management , Seed borne diseases ecofriendly management , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
RIA, Revista de Investigaciones Agropecuarias, 2005
Revista De La Facultad De Agronomia De La Universidad Del Zulia, 1991
Uso de Trichoderma spp para el control biológico de enfermedades de las plantas
Horticultura global, 2012