Enoforum 2021
IVES 9 IVES Conference Series 9 Enoforum Web 9 Enoforum Web Conference 2021 9 Study to optimize the effectiveness of copper treatments for low impact viticulture

Study to optimize the effectiveness of copper treatments for low impact viticulture

Abstract

Among all pathologies that afflict grapevine, Downy Mildew (DM) is the most important. Generally controlled using Copper (Cu), recently European Commission confirmed its usage but limiting the maximum amount to 28 Kg per hectare in 7 years (Reg. EU 2018/1981). Anyway, in the grape growing context it is difficult to reduce the use of Cu and chemicals, due to climate conditions.

The aim of this work was to determine the possibility to reduce Cu using and evaluating the variation of Cu cladding on grapevine leaves and grapes, in relation to climatic conditions. The efficacy level of the Cu protection given to DM and the correlation among them was also assessed. 

Five organic vineyards located in north-eastern of Italy were selected as experimental sites. Leaves and grapes were sampled during vegetative season and analysed for determining the quantity of elemental Cu by the use of ICP AES. Spreading of DM in vineyards was evaluated and climate data (rainfall, temperature and leaf wetness) measured. The correlation between DM, climate and Cu quantity on leaves and grapes was determined. First results indicate that the mean level of Cu applied by farmers (range: 3.77 to 8.88 µg/cm2 of Cu on leaves) during vegetative season is not enough to have an optimal protection against DM (diffusion on grapes and leaves: 40 to 50%). Thus, Cu treatments have to be pondered on the basis of meteorological data and previous infection of DM, so that it will be possible to determine the right quantity of Cu to be applied in correlation with DM presence and weather. 

Data will be correlated with image analysis, in order to quickly study the best conditions for Cu application directly on field, to reduce inputs in plant defence and to guarantee a quality and sustainable production.

DOI:

Publication date: April 23, 2021

Issue: Enoforum 2021

Type: Article

Authors

Giovanni Mian1*, Piergiorgio Comuzzo1, Lucilla Iacumin1, Roberto Zanzotti2, Emilio Celotti1

1 Department of AgriFood, Environmental and Animal Sciences, via Sondrio 2/A, 33100 Udine (Italy).
2 Technology Transfer Centre; Fondazione Edmund Mach; San Michele all ‘Adige (TN) Italy.

Contact the author

Keywords

Vineyard management, Downy Mildew; Treatments optimization, Copper

Tags

Enoforum 2021 | IVES Conference Series

Citation

Related articles…

The valorization of wine lees as a source of mannoproteins for food and wine applications

AIM. Wine yeast lees constitute a winemaking by-product that, unlike grape skins and seeds, are not sufficiently exploited to add value to the winemaking sector, as their treatment and disposal generally represents a cost for wineries [1].

“Gheo” per la vitivinicoltura: un progetto per la produzione dl vini dl alta qualità

Il settore primario, ed in particolare quello agricolo, sta attraversando un periodo partico­larmente delicato. Sia gli aspetti della produzione che quelli della commercializzazione ven­gono infatti messi in discussione da nuovi indirizzi economici e tecnologici.

Diversity and internationalization of wine grape varieties: Evidence from a revised global database

Aim: To quantify the extent to which national mixes of wine grape varieties (in terms of vineyard bearing area) have become more or less diversified, and ‘internationalized’, since wine globalization accelerated from the 1990s.

How to develop strategies of adaptation to climate change based on a foresight exercise?

Prospective studies raise a real intellectual interest for those who contribute to them or take cognizance of it. But they are often considered too difficult to operationalize

Contribution to the sensory and volatile characterization of four traditional Galician red varieties

Galicia, a region sited in the northwest of Spain, is one of the most important wine production area, with five Appellations of Origin Controlled (AOC).