Chitosan-Based Bioactive Formulations for the Control of Powdery Mildew in Viticulture

Grapevine is highly susceptible to fungal diseases, whose incidence and severity increase due to climate change. The present work focuses on the assessment of eight combinations of natural products with chitosan oligomers with fungicidal capacity that may be effective in the integrated control of po...

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Bibliographic Details
Published inAgronomy (Basel) Vol. 12; no. 2; p. 495
Main Authors Ruano-Rosa, David, Sánchez-Hernández, Eva, Baquero-Foz, Rubén, Martín-Ramos, Pablo, Martín-Gil, Jesús, Torres-Sánchez, Sergio, Casanova-Gascón, José
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.02.2022
Subjects
Airborne microorganisms
antifungals
chasmothecia
Chitosan
Climate change
Disease
Disease control
Erysiphe necator
Evaluation
Fungal diseases
Fungicides
Gluten
Growing season
In vitro methods and tests
Infections
Integrated control
Metabolites
Molecular weight
Nanoparticles
Natural products
Oligomers
Overwintering
Powdery mildew
Production costs
Secondary metabolites
Streptomyces
Viticulture
Wineries & vineyards
Germany
Spain
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Summary:Grapevine is highly susceptible to fungal diseases, whose incidence and severity increase due to climate change. The present work focuses on the assessment of eight combinations of natural products with chitosan oligomers with fungicidal capacity that may be effective in the integrated control of powdery mildew, in compliance with Article 14 of the European Directive 2009/128/EC. Their efficacy was evaluated in field conditions against natural infections, in a plot with high disease pressure during a growing season (assaying both foliar or root application), and against overwintering inoculums (chasmothecia) through in vitro tests. In addition, their possible biostimulant capacities were evaluated based on harvest yields. Treatments based on chitosan oligomers in combination with secondary metabolites of Streptomyces spp. and chitosan oligomers combined with hydrolyzed gluten showed the best results in terms of disease control. Given the high efficacy of these formulations, comparable to that of conventional antifungals, they constitute an interesting alternative for the control of this disease whose treatment can, in some cases, represent almost half of the production costs.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy12020495