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Downy mildew (Plasmopara viticola)

Joan Reyes

Servei de Sanitat Vegetal. DAAM

Downy mildew (Plasmopara viticola) is a fungus native to North America that was introduced in France in 1878, and spread throughout Europe in the following years. This fungus has enormous destructive potential and can cause total crop loss within weeks. However, we currently have the necessary means to effectively control mildew, which, when appropriately managed, should pose no risk for growers.

 The incidence of mildew is tightly linked to meteorological conditions, specifically the rainfall and humidity characteristic of the growing season. Mildew is thus common in areas with continental climates, which have high precipitation rates in spring and summer. By contrast, in Mediterranean climates, the irregular distribution of rainfall results in significant variation in the incidence of mildew from year to year. 
In both cases, integrated pest management (IPM) is fundamental for adequate control of this disease, with the minimum number of interventions. Mildew modeling is an essential decision-making tool, which provides useful information on the development of the disease in a given time and location. In Catalonia, this task is performed by the Servei de Sanitat Vegetal, through several networks that disseminate mildew advisories. 
The objective is to determine the risk of mildew attack and to provide advice on the number and timing of necessary treatments. Interest in ecological viticulture has increased markedly in recent years. 
The proportion of the wine-producing area of Catalonia producing organic wine currently stands at 10%, and is increasing. In these cases copper is the product of choice with which to combat mildew. As this is only a preventive measure, further refinement of forecasts and treatment recommendations will be required, and represents an important challenge for the future.

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Data protection policy

In accordance with the Organic Law on the Protection of Personal Data 15/1999, of 13 December, Promotora de Exportaciones Catalanas SA (hereinafter PRODECA), whose address is Gran Via de les Corts Catalanes, 620, principal, 08007 Barcelona, with tax reg. no. NIF A58241316, declares that the images contained on the website www.smartfruitcongress.cat are included in a file belonging to PRODECA. The purpose of this file is the promotion, via its website, of the activities conducted by PRODECA – SmartfFruit IPM International Congress.

PRODECA guarantees that you may, at any time, exercise your right to access, rectify, cancel or oppose by writing to the aforesaid postal address, using the reference "PROTECCIÓN DE DATOS - SMARTFRUIT", or to the email address smartfruitcongress@smartfruitcongress.cat.

Specifically, to correctly exercise these rights you must clearly provide the following items in that communication:
- Name, surname(s) and photocopy of National Identity Document or Passport.
- Statement of the purpose of the request.
- Address for notification purposes.
PRODECA also declares that it reserves the right to delete from its website any content that it considers violates current and applicable legislation.

D’acord amb l’article 17.1 de la Llei 19/2014, la ©Generalitat de Catalunya permet la reutilització dels continguts i de les dades sempre que se'n citi la font i la data d'actualització i que no es desnaturalitzi la informació (article 8 de la Llei 37/2007) i també que no es contradigui amb una llicència específica.