CONTEXT Regardless of irrigation regime, canopy size can affect yield and berry quality attributes particularly under semiarid conditions. It may sound counterintuitive at first but, despite their “luxuriant look”, vines with higher canopies often experience a greater degree of water stress towards the end of the season. If there […]

Introduction Vines with too much yield are often maturing too slowly or producing a fruit of suboptimal quality for wine. A typical practice to reduce yield and hasten maturity with high vigor vines consists of shoot thinning. The removal of undesired shoots reduces canopy density and crop load. However, if this […]

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 […]

How much does vine transpiration increase during a heat wave? To address that question, a team of Australian researchers led by Edwards reported the following observations in 2011.While working in a greenhouse with Cabernet Sauvignon, researchers generated  a 2-day high-temperature event by imposing maximum daytime temperatures near 41°C.  Before imposing the […]

Phenolics within the grape play an important role in a wine’s sensorial properties, such as color, astringency, mouthfeel, and bitterness. For example, increasing the size of tannin molecules will increase astringency, or a higher level of epicatechin-3-O-gallate (ECG) will lead to more chalky dryness and a lower coarseness.  Thus, vineyard […]