Affiliation:
1. Instituto de Investigación de la Viña y el Vino, Escuela de Ingeniería Agraria, Universidad de León, León, Spain
Abstract
ABSTRACT
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.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
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