About Me


Gavin Hubble - (BSc & Post Grad. Business Marketing) - I started working in the wine industry over 23 years ago in New Zealand. Working in; wine retail, sales, wine production, label & packaging design, marketing, wine buying, consulting and wine education. I am responsible for the Brand Health of 60+ wine brands distributed here in New Zealand. Wine Brands from New Zealand, Australia, France, Italy, Spain, Portugal, Chile and Argentina. I work closely with the Trade Industry - (Retail Stores & Restaurants) introducing, educating and positioning exciting and unique brands to wine enthusiasts all over the world.

Monday, July 30, 2012

Pergola Trellising

The pergola trellising system promoted by the Romans and still used in Italy, normally has fewer vines per hectare - with approx 1666 vines/ha in the classic pergola-trellised vineyard, compared with around 4000 vines/ha in a regular VSP.
In the pergola system, shoot-positioning is not required and canopy management is limited. The average Italian vineyard is less than 4ha in area so finding people to harvest the grapes is less of a concern, though two issues work against the pergola trellis: the position of the arms makes harvesting difficult; and the overhead design makes it difficult to use a modern tractor.

 

Vines are trained into a variety of styles that aid in managing the canopy and controlling yields. To find the balance in enough foliage to assist photosynthesis without excessive shading that could inhibit grape ripening or possibly lead to unbalanced fruit development, with high levels of malic acid in some varieties. However, this depends on the vigour of the canopy. A balanced overhead canopy allows sufficient sunlight, airflow and can reach the upper leaves and lateral shoots, which grow up and over the roof. For late-ripening grapes such as Montepulciano, growers must remember that the sun is lower on the horizon later in the season, therefore, the shading and risk of disease increases.
The pergola trellis efficiently intercepts light, thereby giving the vine a higher yield potential, also frost damage is rare and this explains its popularity in mountainous regions, such as Alto Adige, Northern Piedmont and areas of Argentina. It is well known that temperature is an important factor in the maturation and quality of grapes, which works against the pergola. However, in a warm climate, it may be preferable that temperature fluctuations are avoided, and minimising the exposure of grapes to high daytime temperatures. Growers must consider the requirements of each variety, the meso-climate, the desired wine style and vineyard production costs when selecting the best vine trellising system.

5 comments:

  1. He uses statistics as a drunken man uses lampposts -- for support rather than for illumination copertina

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  2. We finally finished yesterday - apart from a bit of touching up here and there. Also the furniture arrived for the newly made sun deck. pergola

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  3. Great information provided. I appreciate your work. I like the way you write. Awesome, keep it up.
    Pergola Adelaide

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  4. This system of trellising (first time I come across this word) is also used in Portugal, although more for decorative reasons than others. My parents have such a pergola over the entrance ramp to the their house's backyard.

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