Physiological means to curb the enthusiasm of viruses from infecting grapevines  

The increasing frequency of heat waves during grape ripening presents challenges for the production of high-quality wine grapes. This underscores the significance of developing effective irrigation and canopy management techniques to optimize both yield and grape quality.
A field experiment was carried out during 2021 and 2022 using Manto negro wine grapes to study the effect of two irrigation strategies and different light exposure levels on grape quality. In a four-block experimental vineyard at Bodega Ribas in Mallorca, two irrigation treatments—moderate and severe deficit irrigation—were implemented. Within each irrigation plot, three light exposure treatments were randomly assigned, encompassing exposed clusters from pea size, non-exposed clusters, and shaded clusters after softening.

After bottling, the wine continues to evolve during storage. The choice of the stopper is an important factor in this evolution. In addition to the oxygen permeability of the closure, the migration of stopper compounds into the wine can also have an impact on the wine organoleptic properties. Many studies have shown that transfers of volatile compounds from the stoppers into the wine can happen depending on the type of closure used (1). Moreover, when cork-made stoppers are used, the migration of phenolic compounds from the stopper into the wine can also occur (2, 3).

Plant roots fulfil important functions as they are responsible for the acquisition of water and nutrients, for anchorage and stability, for interaction with symbionts and, in some cases, for the storage of carbohydrates. These functions are associated with the Root System Architecture (RSA, i.e. the form and the spatial arrangement of the roots in the soil). The RSA results from several biological processes (elongation, ramification, mortality…) genetically determined but with high structural plasticity.

Concerning sustainable Viticultures, the GiESCO notices the current confusion around the notions of:
– ‘integrated’ Viticulture which does not clearly set itself apart of classical so-called ‘reasoned’ Viticulture and involves series of certifications which are distinguishable with difficulty,
– ‘agro-ecological’ Viticulture which adds important elements of sustainability to ‘integrated’ Viticulture, without clarifying really the latter,
– ‘organic’ Viticulture which leans on some unbearable principles such as the opposition between chemical or natural products, with besides a frequent recourse to copper-products,
– ‘biodynamic Viticulture’ which recommends environment-friendly methods, but for very not scientifically verified.

Beyond the sole warming globally perceived and monitored, climate change impacts water availability. Increasing heatwaves frequency observed during the last decades