This discussion is a follow up with our last blog on the 2017 maturation What is the situation end of september? A general disorder in sugar accumulation is observed in northern California. The trend is widespread and shows sluggish sugar accumulation rate across many different vineyards. The extend of the phenomenon indicates […]

Harvest decision 2017: A ripe Cabernet Sauvignon in Napa “should be worth the wait!” We discuss a preliminary analysis of the 2017 vintage effect on berry ripening dynamics. Our main conclusions are synthesized in this short summary below. If you are interested in the rationales and discussion points, please scroll down after the […]

If you read this blog you are probably interested in understanding the complexity of vine response to contrasted environmental conditions. Everyday scientific results shed new light on plant mechanisms which, if they are properly understood, can help the winegrower optimizing his practices. Today, we discuss the relationship between :root temperature, […]

The concept of growing degree days (GDD) Vineyards are particularly sensitive to climate and especially temperature. That is why phenological vine data has been used to reconstruct temperature series over long past periods (Le Roy Ladurie, 1971; Chuine et al., 2004). For example, Garcia de Cortazar Atauri et al. (2005) […]

Leaving more growing nodes per vine at pruning (to increase vine productivity)  and applying  deficit irrigation strategies (to increase fruit and wine quality) are are widely used  practices, particularly in high yielding vineyards under  warm climate. However one may ask how those practices impact vineyard longevity and sustainability ? To […]

How can a winegrower harness vineyard spatial variability to make better wines?   Numerous studies carried out since 2000, on irrigated and non-irrigated vineyards have shown that vineyards exhibit great spatial variability for many factors such as yield or berry quality components (Santesteban et al, 2013). This spatial variability can […]

One of the main challenges for a winegrower before harvest is : “where is it best to sample?” and “how many locations do I need to sample to get a reliable estimate?” In this blog we discuss how to design a sampling scheme to best capture vineyard spatial variability. The plant […]