First report of <i>Phytophthora palmivora</i> on olive trees in Argentina

Lucero, Gabriela; Vettraino, A. M.; Pizzuolo, Pablo Humberto; Stefano, C. Di; Vannini, Andrea

doi:10.1111/j.1365-3059.2007.01588.x

Cited by 16 publications

(19 citation statements)

References 4 publications

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“…Disease impact was serious in nurseries and orchards during the first years after establishment, especially during spring and summer, causing important damage to new plantations. However, root rot of young olive trees was reported to be an emerging problem in nurseries and some important olive grove areas worldwide (Al-Ahmed and Hamidi 1984; Boulila et al 1992; Sanchez-Hernandez et al 1998; Lucero et al 2006). Fusarium species have been recorded from several parts of the world and they are known to be pathogenic to many plants (Boughalleb et al 2005; Mehl and Epstein 2007).…”

Section: Introductionmentioning

confidence: 99%

Morphological and molecular characterization of Fusarium spp. associated with olive trees dieback in Tunisia

et al. 2017

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Dieback and wilting symptoms caused by complex soilborne fungi are nowadays the most serious threatening disease affecting olive trees (Olea europaea) in Tunisia and presumably in many Mediterranean basin countries. Fusarium is one of the important phytopathogenic genera associated with dieback symptoms of olive trees. The objective of the present study was to confirm the pathogenicity of Fusarium spp. isolated from several olive-growing areas in Tunisia. According to the pathogenic test done on young olive trees (cv. Chemlali), 23 out of 104 isolates of Fusarium spp. were found to be pathogenic and the others were weakly or not pathogenic. The pathogenic Fusarium spp. isolates were characterized using molecular methods based on ITS PCR. Isolation results revealed the predominance of Fusarium solani (56.5%) and F. oxysporum species (21.7%) compared to F. chalmydosporum (8.7%), F. brachygibbosum (8.7%) and F. acuminatum (4.34%). Based on pathogenicity test, disease severity was highly variable among the 23 pathogenic isolates tested (P < 0.05) where F. solani was the most aggressive dieback agent. To the best of our knowledge, this is the first work that shows that Fusarium spp. might be a major agent causing dieback disease of olive trees in Tunisia.

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Section: Introductionmentioning

confidence: 99%

Morphological and molecular characterization of Fusarium spp. associated with olive trees dieback in Tunisia

et al. 2017

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“…In olive trees severe damages are caused by the disease known as “dry branch” caused by Phytophthora nicotianae , P. citrophthora and P. palmivora . The name “Dry Branch” has been used to distinguish it from other diseases, where the tree canopy looks like Verticillium wilt or insect damages . Diseased plants show rootlets death, leaves yellowing, or branch defoliation .…”

Section: Introductionmentioning

confidence: 99%

“…CZE-UV electropherograms of (A) oregano and thymus common extracts and (B) creosote bush and chamomile extracts, at 290 nm; catechin (1), naringenin (2), cinnamic acid (3), chlorogenic acid (4), syringic acid (5), luteolin(6), apigenin(7), quercetin (8), vanillic acid (9), caffeic acid(10).…”

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confidence: 99%

Phenolic characterization and antimicrobial activity of folk medicinal plant extracts for their applications in olive production

et al. 2014

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Phytophthora spp is important in plant pathology due to the importance of the diseases it causes. In olive trees, severe damages are caused by the disease known as "dry branch" occasioned by Phytophthora nicotianae, P. citrophthora and P. palmivora. Much effort has been made to find efficient methods of control, with a low negative impact on environment. In this regard, treatment with plant extracts is a valid strategy. The aims of the present study are (i) to determine the polyphenol composition of extracts of Thymus vulgaris, Origanum vulgare, Matricaria recutita, and Larrea divaricata by CZE, (ii) correlate the analytical composition of these extracts with the inhibition on the mycelial growth, and (iii) determine the individual antimicrobial activity of the most active ingredients. A simple methodology was developed for the determination of catechin, naringenin, cinnamic acid, syringic acid, chlorogenic acid, apigenin, vanillic acid, luteolin, quercetin, and caffeic acid in plant extracts by CZE. The extraction of phenolic compounds in extract was performed by a miniaturized solid phase extraction using a home-made minicolumn packed with suitable filtering material (C18 , 50 mg). The optimized analyses conditions were: 30 mM boric acid buffer, pH 9.50; capillary, 57 cm full length, 50 cm effective length, 75 μm id, hydrodynamic injection 30 mbar, 2 s; 25 kV; 25°C, detection by UV absorbance at 290 nm. Sample results suggest that phenolic composition seems to have a great influence on inhibition of pathogens. The highest inhibitions of mycelial growth were observed for cinnamic acid and naringenin.

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“…Además de Phytophthora, con frecuencia se aisló V. dahliae a partir de plantas afectadas por "seca", lo que pone de manifiesto la presencia de los dos patógenos en los mismos campos, e incluso infectando simultáneamente a los mismos individuos. Otras identificaciones fueron: Phytophthora citrícola y P. drechsleri, en California; P. megasperma P. palmivora y P. citrícola en Argentina y P. megasperma en Italia (Teviotdale, 1994;Sánchez Hernández et al, 2001;Nigro et al, 2005;Vettraino et al, 2009;Lucero et al, 2005Lucero et al, , 2007Lucero et al, y 2012. Lo Giudice et al (2010) demostraron en Sicilia, Italia la infección conjunta entre P. palmivora y V. dahliae.…”

Section: Campañas De Producción (T)unclassified

“…En investigaciones realizadas en la Cátedra de Fitopatología de la Facultad de Agronomía de la Universidad de Cuyo, Lucero et al, 1999 consideraron que los agentes causales del síndrome de la "rama seca" eran Phytophthora y Pythium. De sus aislados identificaron a Phythophtora nicotianae, P. palmivora y P. citrícola (Lucero et al, 2012(Lucero et al, , 2007Vettraino et al, 2009;). Su hipótesis es que V. dahliae no es el causal de la "rama seca", basándose en que éste se diferencia fácilmente mediante su aislados (Lucero et al, 2008).…”

Section: Costilla (2000) Estudiando Plantaciones De Vid Y Olivo De Launclassified

Revisión de antecedentes, presencia, incidencia, severidad, frecuencia de agentes asociados y mermas de rendimiento para “rama seca” del olivo en la provincia de La Rioja

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“Rama seca” es el principal problema del olivar riojano. En una finca en Catinzaco, provincia de La Rioja se estimó su incidencia entre 2001 y 2005. En 2009 se evaluó severidad en plantaciones de 1999 y 2001. Adicionalmente en 2009 y 2010 se realizó el seguimiento de 130 plantas sintomáticas y asintomáticas cv ‘Picual’(plantación 1999) registrando severidad, efecto de variables ambientales, reducción de rendimiento y etiología. La detección de Verticillium dahliae Kleb se efectuó por técnicas tradicionales, qPCR y nPCR. Entre 2001 y 2005, la incidencia aumentó diez veces en el grupo ‘Arbequina’, ‘Barnea’, ‘Kadesh’, ‘Manzanilla’, ‘Nabalí’, ‘Novo’ y ‘Picual’, con los mayores valores para ‘Kadesh’ y ‘Manzanilla’. La plantación 1999, mostró severidad >60% en ‘Mission’ y ‘Sirio’; mientras que en la del 2001, ‘Barnea’ cuadriplicó a ‘Arbequina’ y duplicó a ‘Picual’. ‘Arbequi- na’ mostró los menores valores de incidencia y severidad. La parcela cv ‘Picual’ de 1999, mostró diferencias de severidad entre plantas asintomáticas y enfermas, entre fechas de evaluación e interacción. Las ecuaciones de regresión entre la severidad y las variables climáticas que mejor predijeron el avance de la enfermedad, estuvieron conformadas por un factor lineal con temperaturas inferiores a 20ºC y otro exponencial con temperaturas superiores a 35ºC; el primer factor tendió a disminuir la enfermedad y el segundo a estabilizarla. Asimismo la severidad de “rama seca” tendió a incrementarse con el aumento de las precipitaciones. La reducción en rendimiento alcanzó 93% (2009). La regresión de datos de severidad y rendimiento 2009 y 2010, mostró asociación entre las variables analizadas. La técnica nPCR permitió detectar por primera vez a la cepa defoliante de V. dahliae en ‘Picual’, mientras que qPCR resultó altamente sensible y específico para V. dahliae. Es la primera cita de la detección de la cepa defoliante de V. dahliae en olivo en Argentina y la primera evaluación de pérdidas de rendimiento atribuibles a “rama seca”.

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First report of Phytophthora palmivora on olive trees in Argentina

Cited by 16 publications

References 4 publications

Morphological and molecular characterization of Fusarium spp. associated with olive trees dieback in Tunisia

Morphological and molecular characterization of Fusarium spp. associated with olive trees dieback in Tunisia

Phenolic characterization and antimicrobial activity of folk medicinal plant extracts for their applications in olive production

Revisión de antecedentes, presencia, incidencia, severidad, frecuencia de agentes asociados y mermas de rendimiento para “rama seca” del olivo en la provincia de La Rioja

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