terclim by ICS banner
IVES 9 IVES Conference Series 9 Utilizing ozone for the management of powdery mildew (Erysiphe necator Schwein.) in vineyards: potential and challenges

Utilizing ozone for the management of powdery mildew (Erysiphe necator Schwein.) in vineyards: potential and challenges

Abstract

Powdery mildew, caused by fungal pathogens, poses a significant threat to grapevines in the DOCa Rioja region. In efforts to improve control strategies while reducing reliance on conventional phytosanitary products, ozone could constitute a potential alternative. However, it has short persistence, thus requiring frequent treatments. This study aimed to assess the suitability of ozone as an active substance for controlling powdery mildew within a phytosanitary strategy aimed at reducing conventional phytosanitary product usage. The strategy integrating ozone with conventional products yielded powdery mildew levels comparable to conventional treatments in both disease incidence and severity. Nonetheless, employing a strategy solely based on ozone applications resulted in higher disease incidence and severity levels compared to the conventional treatment, particularly in the Tempranillo variety. These findings underscore the potential of ozone as a component of integrated disease management strategies in vineyards, offering an environmentally friendly alternative to traditional phytosanitary products. However, caution is warranted when relying solely on ozone, as observed efficacy variations across grape varieties suggest a need for tailored approaches. Further research is needed to optimize ozone application methods and explore its interactions with different grapevine cultivars and environmental conditions. In conclusion, while ozone shows promise as a tool for reducing conventional phytosanitary product usage in powdery mildew control, its effectiveness may be limited as a standalone method, particularly in certain grape varieties like Tempranillo. This study contributes to ongoing efforts to refine disease management strategies in viticulture, emphasizing the importance of integrated approaches for sustainable grape production.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Cuadrado-Galera Isabel1*, Varela Alejandro1, Arbizu-Milagro, Julia1, Tascón Alberto1, González-López Óscar1 ,Castillo-Ruiz Francisco José1, 2

1Universidad de La Rioja. Departamento de Agricultura y Alimentación. Facultad de Ciencia y Tecnología, C/ Madre de Dios, 53, 26006, Logroño, España
2Departamento de Ingeniería Rural, Construcciones Civiles y Proyectos de Ingeniería. E.T.S. de Ingeniería Agronómica y de Montes, Universidad de Córdoba, Campus de Rabanales, Edificio Leonardo Da Vinci, ctra. N-IV, km 396, 14014, Córdoba, España

Contact the author*

Keywords

incidence, severity, ozone, grapevines, phytosanitary treatment

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Optimizing vine pruning of Pinot noir and Müller-Thurgau after extreme hail damage

Hail damage can have a major impact on the vine’s physiological growth (defoliation, wood and cane damage) and can lead to significant yield and economic losses.

Read More

Utility of leaf removal timing and irrigation amounts on grape berry flavonoids under climate change

Context and purpose of the study – The dormant and growing season temperatures in California USA have been increasing with more clear sky days. A consequence increasing temperatures and clear sky days is water deficit conditions. Viticulturists must determine appropriate balances of canopy management and irrigation budgeting to produce suitable yields without compromising berry chemistry. In response, a study designed to test the interactive effects of leaf removal timing and applied water amounts on Cabernet Sauvignon/110R in Napa Valley, CA.

Read More

Using multifactorial analysis to evaluate the contribution of terroir components to the oenological potential of grapes at harvest

The oenological potential of grapes at harvest depends on a combination of the major components of Terroir: the climate, the soil, the plant material, the training system and the crop management.

Read More

Field-grown Sauvignon Blanc berries react to increased exposure by controlling antioxidant homeostasis and displaying UV acclimation responses that are influenced by the level of ambient light

Leaf removal in the bunch zone is a common viticultural practice with several objectives, yet it has been difficult to conclusively link the physiological mechanism(s) and metabolic berry impact to this widely practiced treatment. We used a field-omics approach1 in a Sauvignon blanc high altitude model vineyard, showing that the early leaf removal in the bunch zone caused quantifiable and stable responses (over years) in the microclimate where the main perturbation was increased exposure. We provide an explanation for how leaf removal leads to the shifts in grape metabolites typically linked to this treatment and confirm anecdotal evidence and previous reports that leaf removal treatment at an early stage of berry development affects “quality-associated” metabolites (monoterpenes and norisoprenoids).

Read More

Vineyard nutrient budget and sampling protocols

Vineyard nutrient management is crucial for reaching production-specific quality standards, yet timely evaluation of nutrient status remains challenging. The existing sampling protocol of collecting vine tissue (leaves and/or petioles) at bloom or veraison is time-consuming. Additionally, this sampling practice is too late for in-season fertilizer applications (e.g. N is applied well before bloom). Therefore alternative early-season protocols are necessary to predict the vine nutrient demand for the upcoming season. The main goals of this project are to 1) optimize existing tissue sampling protocols; 2) determine the amount of nutrients removed at the end of the growing season.

Read More