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Article

Assessing the Effects of Vineyard Soil Management on Downy and Powdery Mildew Development

1
AGRIS, Agricultural Research Agency of Sardinia, Loc. Bonassai S.S. 291 Sassari-Fertilia—Km. 18,600, 07100 Sassari, Italy
2
Department of Agricultural Sciences, University of Sassari, Viale Italia 39, 07100 Sassari, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Harlene Hatterman-Valenti
Horticulturae 2021, 7(8), 209; https://doi.org/10.3390/horticulturae7080209
Received: 23 June 2021 / Revised: 16 July 2021 / Accepted: 20 July 2021 / Published: 22 July 2021
(This article belongs to the Special Issue Grape Responses to Abiotic and Biotic Stresses)
Advantages of vineyard cover crops include soil conservation, nutrient and water cycling, and a better growth–yield balance. They naturally promote agro-system biological multifunctionality, soil biocenosis, and biological pest control. However, for the role of cover crops on disease control, there is still a lack of information. We performed a systematic evaluation of the soil management effects on the development of two main pathogens: Plasmopara viticola and Erysiphe necator. Conventional soil tillage was compared to grass and legume cover crops during a three-season trial in the Nurra wine region (Sardinia, Italy). Disease and grapevine development were assessed in relation to the weather, leaf area growth, leaf nitrogen, canopy density, and favorable microclimatic conditions for each disease, to weight their importance on disease susceptibility in each treatment. Higher infection percentages were observed in plots subjected to soil tillage. Disease development was better understood in relation to leaf area, leaf nitrogen, and canopy density. The main role of weather conditions on downy mildew infections was ascertained, yet high canopy sunlight levels reduced disease spread under grass cover. For powdery mildew, leaf nitrogen had a crucial role in disease development under soil tillage, and canopy light and hygrothermal conditions had the most relevant function on disease development in cover-cropped vineyards. View Full-Text
Keywords: soil tillage; grass and legume cover crops; Plasmopara viticola; Erysiphe necator; epidemiology; canopy growth; nitrogen and microclimate soil tillage; grass and legume cover crops; Plasmopara viticola; Erysiphe necator; epidemiology; canopy growth; nitrogen and microclimate
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MDPI and ACS Style

Fernandes de Oliveira, A.; Serra, S.; Ligios, V.; Satta, D.; Nieddu, G. Assessing the Effects of Vineyard Soil Management on Downy and Powdery Mildew Development. Horticulturae 2021, 7, 209. https://doi.org/10.3390/horticulturae7080209

AMA Style

Fernandes de Oliveira A, Serra S, Ligios V, Satta D, Nieddu G. Assessing the Effects of Vineyard Soil Management on Downy and Powdery Mildew Development. Horticulturae. 2021; 7(8):209. https://doi.org/10.3390/horticulturae7080209

Chicago/Turabian Style

Fernandes de Oliveira, Ana, Salvatorica Serra, Virna Ligios, Daniela Satta, and Giovanni Nieddu. 2021. "Assessing the Effects of Vineyard Soil Management on Downy and Powdery Mildew Development" Horticulturae 7, no. 8: 209. https://doi.org/10.3390/horticulturae7080209

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