Evaluation of Olive Cultivars for Resistance to Verticillium dahliae

López-Escudero, Francisco Javier; Río, Carmen del; Caballero, José L.; Blanco-López, M. A.

doi:10.1023/b:ejpp.0000010150.08098.2d

Cited by 139 publications

(209 citation statements)

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“…However, if during summer days temperatures are above 25°C for a prolonged period of time, both pathogen colonization and symptom development normally stop. All these observations and results have served to standardize temperature conditions in controlled-growth chambers to promote VWO epidemics in a number of studies (for instance, MercadoBlanco et al 2001;López-Escudero et al 2004).…”

Section: B) Environmental Factors: Temperature Edaphic Features and mentioning

confidence: 95%

“…The ND pathotype causes nearly the same symptoms in olive as D-pathotype infections, although at milder (defoliation of green leaves) or moderate (die-back, chlorosis or necrosis) levels. Similarly, it induces reduction in weight and, to a lesser extent, in height under favorable environmental conditions (López-Escudero and Blanco-López 2001;López-Escudero et al 2004, 2007aMartos-Moreno et al 2006). Differences in virulence seem to be consistent among olive cultivars (López-Escudero et al 2004, 2007aMartos-Moreno et al 2006;Dervis et al 2010).…”

Section: Pathogenicity Groupsmentioning

confidence: 99%

“…Similarly, it induces reduction in weight and, to a lesser extent, in height under favorable environmental conditions (López-Escudero and Blanco-López 2001;López-Escudero et al 2004, 2007aMartos-Moreno et al 2006). Differences in virulence seem to be consistent among olive cultivars (López-Escudero et al 2004, 2007aMartos-Moreno et al 2006;Dervis et al 2010). The broad host range and apparent low host specificity suggests that V. dahliae populations contain low pathogenic and genetic diversity.…”

Section: Pathogenicity Groupsmentioning

confidence: 99%

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Verticillium wilt of olive: a case study to implement an integrated strategy to control a soil-borne pathogen

2010

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Olive (Olea europaea L.) is one of the first domesticated and cultivated tree species and has historical, social and economical relevance. However, its future as a strategic commodity in Mediterranean agriculture is threatened by diverse biotic (traditional and new/emerging pests and diseases) and abiotic (erosion, climate change) menaces. These problems could also be of relevance for new geographical areas where olive cultivation is not traditional but is increasingly spreading (i.e., South America, Australia, etc). One of the major constraints for olive cultivation is Verticillium wilt, a vascular disease caused by the soil-borne fungus Verticillium dahliae Kleb. In this review we describe how Verticillium wilt of olive (VWO) has become a major problem for olive cultivation during the last two decades. Similar to other vascular diseases, VWO is difficult to manage and single control measure are mostly ineffective. Therefore, an integrated disease management strategy that fits modern sustainable agriculture criteria must be implemented. Multidisciplinary research efforts and advances to understand this pathosystem and to develop appropriate control measures are summarized. The main conclusion is that a holistic approach is the best strategy to effectively control VWO, integrating biological, chemical, physical, and cultural approaches.

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Section: B) Environmental Factors: Temperature Edaphic Features and mentioning

confidence: 95%

Section: Pathogenicity Groupsmentioning

confidence: 99%

Section: Pathogenicity Groupsmentioning

confidence: 99%

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Verticillium wilt of olive: a case study to implement an integrated strategy to control a soil-borne pathogen

2010

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“…Arbequina) on their own roots, at a spacing of 3.5 m × 7 m (408 trees per hectare) which is a commonly used density for modern intensive olive plantations in the area of the study. 'Arbequina' olives are extremely susceptible and susceptible to D and ND V. dahliae, respectively, under controlled conditions (28). The orchard was drip irrigated (two drippers per tree located 10 to 20 cm apart from the trunk) to fully satisfy tree water demand.…”

Section: Methodsmentioning

confidence: 99%

“…V. dahliae isolates infecting olive can be classified into defoliating (D) or nondefoliating (ND) pathotypes, based on their ability to cause defoliation or no defoliation of green leaves from shoots and twigs (28,40). These two pathotypes can be differentiated in infected plants by means of specific polymerase chain reaction (PCR) markers (33).…”

Section: Additional Abstract: Olea Europaeamentioning

confidence: 99%

Spatiotemporal Analysis of Spread of Infections by Verticillium dahliae Pathotypes Within a High Tree Density Olive Orchard in Southern Spain

Navas‐Cortés¹,

Landa²,

Mercado‐Blanco³

et al. 2008

Phytopathology®

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The development of Verticillium wilt epidemics in olive cv. Arbequina was studied from November 1999 to May 2003 in a drip-irrigated, nontillage orchard established in a soil without a history of the disease at Córdoba, southern Spain. Disease incidence measured at 1-month-intervals increased from 0.2 to 7.8% during this period. Verticillium dahliae infecting the trees was characterized as defoliating (D) or nondefoliating (ND) pathotypes by a specific, multiplex-polymerase chain reaction (PCR) assay. Of the symptomatic trees, 87.2 and 12.8% were infected by the D or ND pathotypes, respectively. Dynamics of disease incidence were described by a generalized logistic model with a multiple sigmoid pattern. In the fitted model, the infection rate was highest in the winter to spring period and decreased to minimum values in the summer to fall period. Binary data of disease incidence was analyzed for point pattern and spatial correlation, either directly or after parsing them in contiguous quadrats. Overall, ordinary runs analysis indicated a departure from randomness of disease within rows. The binomial index of dispersion, interclass correlation, and Taylor's power law for various quadrat sizes suggested aggregation of diseased trees within the quadrat sizes tested. Spatial analysis by distance indices showed a nonrandom arrangement of quadrats containing infected trees. Spatial pattern was characterized by the occurrence of several clusters of infected trees. Increasing clustering over time was generally suggested by stronger values of clustering index over time and by the increase in the size of patch clusters. Significant spatial association was found in the clustering of diseased trees over time across cropping seasons; however, clustering was significant only for infections by D V. dahliae, indicating that infections by the D pathotype were aggregated around initial infections. The number and size of clusters of D V. dahliae-infected trees increased over time. Microsatellite-primed PCR assays of a representative number of V. dahliae isolates from diseased trees indicated that the majority of infecting D isolates shared the fingerprinting profile with D V. dahliae isolated from soil of a naturally infested cotton field in close proximity to the orchard, suggesting that short distance dispersal of the pathogen from this soil to the olive orchard may have occurred.

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Use of natural‐based commercial products as an alternative for providing bioprotection against verticillium wilt of olive

Antón‐Domínguez,

Díaz‐Díaz,

Acedo‐Antequera

et al. 2024

J Sci Food Agric

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BACKGROUNDDue to the ineffectiveness of existing control methods against Verticillium dahliae, the causal agent of Verticillium wilt of olive (Olea europaea; VWO), it is necessary to search for sustainable and environmentally friendly alternatives such as bioprotection by products based on plant extracts and other naturally synthesized compounds. Therefore, the main objective of this study was to evaluate the effects of seven natural‐based commercial products on the inhibition of mycelial growth, the germination of V. dahliae conidia and microsclerotia, and disease progression in olive plants (cv. Picual). Aluminium lignosulfonate and a copper phosphonate salt (copper phosphite) were included for comparative purposes.RESULTSThe seaweed and willow extracts and copper phosphite inhibited V. dahliae mycelial growth by more than 50% at the high doses tested. Most of the products inhibited conidial germination up to 90% compared to the control at the high doses tested. However, none of the products showed efficacy above 50% in inhibiting microsclerotia (MS) germination. The willow extract was the most effective at reducing disease severity and progression in olive plants, with no significant differences compared to the noninoculated negative control.CONCLUSIONSThe results of this study suggest that the use of natural‐based products, i.e., seaweed and willow extracts, is a potential sustainable alternative in an integrated VWO control strategy.This article is protected by copyright. All rights reserved.

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Evaluation of Olive Cultivars for Resistance to Verticillium dahliae

Cited by 139 publications

References 9 publications

Verticillium wilt of olive: a case study to implement an integrated strategy to control a soil-borne pathogen

Verticillium wilt of olive: a case study to implement an integrated strategy to control a soil-borne pathogen

Spatiotemporal Analysis of Spread of Infections by Verticillium dahliae Pathotypes Within a High Tree Density Olive Orchard in Southern Spain

Use of natural‐based commercial products as an alternative for providing bioprotection against verticillium wilt of olive

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