From the bunch to the stem

We have already spoken about the advantages of the mechanical harvest. Its benefits are related to time-saving, harvesting costs, better precision, and the improvement of the quality of the grape. As you can imagine, turning the bunch into a stem in record time and with all the guarantees is another of the great advantages of the mechanical process. Have you ever asked how destemming of the berry from its “skeleton’” is done? Well, let me enlighten you right away. As you already know, the harvesting machine works as it straddles on every row of the vines. It shakes the bunch of grapes vigorously with a kind of “beater bars”. Thanks to the vibratory movements, berries come out of the bunch easily and fall into a conveyor belt housed inside the machine. This method is so effective, that 80% of the bunch – of course, empty – remains on the vine.

But, what happens with the stems that, inevitably, come into the machine? A built-in stalk remover, inside the machine, takes care of it. It is so efficient, that it manages to remove them immediately before the berries enter the hopper. In so doing, the berries are completely free from stems avoiding any foreign object, which could infuse the must with undesired bitter flavours, to come into the press. As you can imagine, destemming is an essential process. Not only removes the berry from the stem, but also many other plant residues, such as leaves and small vine shoots.

In the case of Cuatro Rayas Winery, another advantage of the mechanical destemming is that we do it in the field, making sure that the grapes that go into the winery are completely free of those residues. However, the whole process, which we have just explained finishes with a final check in the cellar, once the trailer comes with the grape load.

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