Effectiveness of Natural Antifungal Compounds in Controlling Infection by Grapevine Trunk Disease Pathogens through Pruning Wounds

Grapevine trunk fungal pathogens, such as Diplodia seriata and Phaeomoniella chlamydospora, can infect plants through pruning wounds. They cause grapevine trunk diseases and are involved in grapevine decline. Accordingly, the protection of pruning wounds is crucial for the management of grapevine tr...

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Bibliographic Details
Published in:Applied and environmental microbiology 2015-09, Vol.81 (18), p.6474-6483
Main Authors: Cobos, Rebeca, Mateos, Rosa María, Álvarez-Pérez, José Manuel, Olego, Miguel Angel, Sevillano, Silvia, González-García, Sandra, Garzón-Jimeno, Enrique, Coque, Juan José R
Format: Article
Language:English
Subjects:
Agriculture
Antifungal Agents - chemistry
Antifungal Agents - isolation & purification
Antifungal Agents - pharmacology
Ascomycota - drug effects
Ascomycota - pathogenicity
Berries
Fungi
Microbiology
Plant diseases
Plant Diseases - microbiology
Plant Diseases - prevention & control
Plant Microbiology
Vitis - anatomy & histology
Vitis - microbiology
Wood - drug effects
Wood - microbiology
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Summary:Grapevine trunk fungal pathogens, such as Diplodia seriata and Phaeomoniella chlamydospora, can infect plants through pruning wounds. They cause grapevine trunk diseases and are involved in grapevine decline. Accordingly, the protection of pruning wounds is crucial for the management of grapevine trunk diseases. The efficacy of different natural antifungals in inhibiting the growth of several fungi causing grapevine trunk diseases was evaluated in vitro. The fungi showing greater in vitro efficacy were tested on autoclaved grape wood assays against D. seriata and P. chlamydospora. Based on results from these assays, chitosan oligosaccharide, vanillin, and garlic extract were selected for further evaluation on pruning wounds inoculated with D. seriata and P. chlamydospora in field trials. A significant decrease in plant mortality was observed after 2 years of growth in the plants treated with the different natural antifungals compared to the mortality rate observed in infected plants that were not treated with antifungals. Also, the infection rate for the inoculated pathogens was significantly reduced in plants treated with the selected natural antifungals. Therefore, natural antifungals represent a promising alternative for disease control and could provide significant economic benefits for the grape-growing industry.
ISSN:0099-2240
1098-5336
DOI:10.1128/AEM.01818-15