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Development and validation of an inoculation method to assess the efficacy of biological treatments against Verticillium wilt in olive trees

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Abstract

Verticillium wilt in olive trees, caused by the soil-borne fungus Verticillium dahliae, is one of the most serious diseases of this crop due to high tree mortality and the difficulty of control. One of the major constraints to developing control measures against this disease is the lack of inoculation methods to evaluate the effectiveness of treatments. Here, we compared five inoculation methods for screening biological control agents (BCAs). The soil infested with cornmeal sand medium at 20 % w/w performed the best, and its effectiveness was further tested in olive plants treated with six BCAs, four strains of the fungal species Fusarium moniliforme, F. oxysporum, Gliocladium roseum and Phoma sp., and two fermented mixtures of several yeasts and bacteria. Strains of F. oxysporum, Phoma sp. and two mixtures of microorganisms significantly decreased the severity of the disease in potted plants of the susceptible olive cv. Picual.

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Acknowledgments

This research was funded by the Spanish Interprofessional Olive Oil Association (project CONV 129/11) and by the Andalusian Regional Government (project P08-AGR-03635). The first author is grateful to the Spanish Interprofessional Olive Oil Association for a predoctoral fellowship. J.Moral holds a Talent Hub fellowship launched by the Andalusian Knowledge Agency, cofunded by the European Union’s 7th FP, Marie Skłodowska-Curie actions. We thank M. C. Raya, L. Roca and F. Luque for her skillful technical assistance in the laboratory.

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  1. Departamento de Agronomía, Universidad de Córdoba ETSIAM, Edificio C4, Campus de Rabanales, 14071, Córdoba, Spain

    Angela Varo, Juan Moral, María Denis Lozano-Tóvar & Antonio Trapero

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  1. Angela Varo
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  2. Juan Moral
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  3. María Denis Lozano-Tóvar
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  4. Antonio Trapero
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Correspondence to Angela Varo.

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Varo, A., Moral, J., Lozano-Tóvar, M.D. et al. Development and validation of an inoculation method to assess the efficacy of biological treatments against Verticillium wilt in olive trees. BioControl 61, 283–292 (2016). https://doi.org/10.1007/s10526-015-9710-3

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  • DOI: https://doi.org/10.1007/s10526-015-9710-3

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