terclim by ICS banner
IVES 9 IVES Conference Series 9 Response to powdery and downy mildew of varieties with disease resistance genes (PIWI)

Response to powdery and downy mildew of varieties with disease resistance genes (PIWI)

Abstract

Erysiphe necator and Plasmopara viticola are the causal agents of powdery and downy mildew on grapevines, leading to significant economic losses. Numerous chemical treatments are applied to control these diseases, leading to environmental problems and the appearance of resistance to these products. Therefore, the study of new strategies to achieve the objectives of sustainable development is a priority. In this sense, the use of new varieties resistant to these diseases may be an option of interest. The objective of this work was to analyze the degree of resistance of 9 varieties with downy mildew resistance genes (Rpv3 and/or Rpv12), four of which also carry a powdery mildew resistance gene (Ren 1) by in vitro inoculation assays. Young leaves previously sterilized were inoculated with a vacuum tower. Fungal development was evaluated on a scale from 1 to 5, seven and 14 days after inoculation. At 7 days, mycelium growth, without development of conidiophores, was observed in all varieties, with Eidos having the highest incidence. At 14 days, none of the varieties reached a scale of 4, except Mazuelo (used as standard). The highest incidence was recorded in the Volos variety. Preliminary trials on downy mildew also showed differences in resistance to attack by P. viticola, with Kretos having the highest incidence of the disease, but further trials will be conducted to validate these data. These results reveal that these varieties may be an alternative in order to reduce the number of spray applications to control the fungus.

 

Acknowledgments: This work has been funded by the Government of La Rioja, (Fortalece 2021/08). Support from the staff at CIDA and the Plant Resources service of the ICVV is gratefully acknowledged.

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

M. Mar Hernández*, Sara I. Blanco–González, Cristina M. Menéndez

Instituto de Ciencias de la Vid y el Vino (ICVV (UR-GR-CSIC)), Finca La Grajera, Carretera de Burgos km 6, 26007, Logroño, La Rioja, Spain

Contact the author*

Keywords

PIWI, powdery mildew, downey mildew, sustainable viticulture, resistant varieties

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

REGAVID a decision tool to deficit irrigation in a temperate climate (DO Monterrei – Spain)

In temperate climates, such as in the North of Spain, the use of irrigation in the vineyard has not been required, due to the usual rainfall from June to August. In some large vineyards, irrigation management has been carried out, based on occasional support irrigation, or for the application of nutrients (fertigation). Currently it is necessary to implement decision support models to manage irrigation water in real time and avoid misuse of a scarce resource. Moreover, quality standards must be achieved, as in the previous rainfed viticulture.

Managing changes in taste: lessons from champagne in britain 1800-1914

This paper focuses on how taste in wine (and other foods) changes and the implications of this process
for producers and merchants.
It draws primarily on the changing taste of and taste for champagne in Britain in the 19th century. Between 1850 and 1880 champagne went from a dosage level of around 20% (20 grams sugar / litre) to 0%. Champagne became the ‘dinner wine of the elite – drunk with roast meat and savoury dishes.
Contemporaries accepted that while most people could distinguish the taste of good champagne from that of bad, very few could distinguish very good from good.

Agrivoltaic: chances preparing Riesling towards a better climate resilience

Agrivoltaics (AV), the innovative dual-use of land for agriculture and photovoltaic energy production on the same land, offers a promising solution to the challenges of expanding renewable energy without compromising valuable agricultural land.

Using 1H-NMR combined with chemometrics to discriminate the effect of different cuts and toasting of woods used for grape pomace distillate ageing

The purpose of this research study is to consider new solutions for distillate ageing, in alternative to conventional oak chips or barrels in particular sliced wood and peeled wood were compared to oak cubes, normally employed during both wine and distillate ageing.

Delineation significance in viticultural zoning: examples in the Southern Côtes-du-Rhône

In order for a spatialized gestion of wine-producing areas, delineation of viticultural zones is needed. Viticultural zoning according to qualitative expression of varieties is a great concern