The Greenseeker technique
Today, thanks to a cutting-edge system developed by a Swiss company, the vineyard manager at Château Phélan Ségur can finely measure and interpret the vigour in the vineyard throughout the year. This technology, called Greenseeker, is fitted to the straddle tractors. Linked to a GPS, it calculates the Normalised Difference Vegetation Index (NDVI). It gives a measurement of the physiological activity of the plants. The mapping thus obtained illustrates the evolution of the vineyard in real time and is a precious tool for decision-making: it allows a reliable estimate of the nutritional needs of the plants and control of their vigour throughout the year and measurement, for example, of their nitrogen status. Key information for achieving more precise fertilisation and treatments, but also for carrying out corrective actions throughout the year, at the time of pruning or leaf removal.
At the crucial time of the harvest, and for the first time in October 2012, the determination of micro parcels that were homogeneous in terms of vigour led to new choices for vatting the grapes (corresponding, of course, to ripeness requirements).