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James Whitelatch
 
September 7, 2017 | Vineyard, winemaker | James Whitelatch

Why Do We Use a Mechanical Harvester for Most of our Grapes?

We began our 2017 harvest with our Sauvignon Blanc. We harvest most of our vineyards with our mechanical grape harvester. It is a tall machine that straddles the trellis and uses special plastic rods, called bows, to shake the grapes off the vine. Depending on varietal this shaking will remove only the grapes and some leaves, leaving behind the rachis, which is the structure that holds the berries in a cluster. The harvester has a bucket conveyer on each side of the vine that the grapes fall in, which then carries them to another tractor with bins. A harvester can either be self-propelled or towed by a tractor and ours is pulled by a tractor because our vineyards have some steep slopes. We do still hand harvest of some of our steepest rows. When it comes to picking grapes, harvesting by machine is the most efficient method of removing grapes from the vines. In our vineyards, we can do roughly an acre an hour, so between 2-4 tons of grapes. In most cases the grapes go from being on the vine, crushed and into a tank for fermentation in a limited amount of time often less than an hour. Grapes that are picked by hand take more time because the grapes sit in bins under the vines until the bins can be picked up and taken to the winery.

Another reason we find the machine harvester a success is that our winemaker, Joe, can “blend” from the vineyard by choosing which rows be wants picked on any given day.

An example of a rachis after mechanical harvesting. Even though the grapes are gone, the leaves around are still whole and undamaged.

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