Recently retired New Zealand wine scientist Dr. Mike Trought, who worked for Villa Maria Wines and at Lincoln University, recently underlined the many aspects of wine science he has undertaken in his career; from bird behaviour in vineyards to irrigation, yield predictions and canopy management. “Wine science is about trying to anticipate the future,” said Trought. “Today’s problems have to be solved with today’s information. Tomorrow’s problems have to be worked on today."
"The New Zealand wine industry holds a special place in the world, which we are all passionate about. Our industry is like a grapevine, it needs to be nurtured and cared for to grow and remain healthy, for all great wines start in the vineyard.”
The Australian wine industry holds a technical conference every three years that looks at various research and technical innovations. It incorporates WineTech – the Australian Wine Industry Trade Exhibition, Australia’s premier exhibition of wine technology, equipment and services featuring winemaking and vineyard equipment, materials and associated services. In the past, innovation and technology have played an essential role in the success of the Australian wine industry.
Think refrigeration in wineries, tank infrastructure, and Stelvin screw caps. Now a new generation of sensor - driven viticulture tools is giving grape growers the ability to monitor and measure their vines like never before. Remote sensors with the ability to detect everything from how much water a plant is storing to how much light is falling on the ripening grape are revealing valuable information to growers.
Precision viticulture sees data collected via aerial images, either utilizing satellites or, more commonly, flying an aeroplane or a drone over the vineyards, or the use of yield monitors. These devices are attached to harvesters and, when used with GPS, enable yield maps to be generated. Typically, the areas with the heaviest yields are of lower quality than those with the lower yields.
After it is in the bottle, oxygen is wine’s enemy, but by adding oxygen during key parts of the fermentation process, winemakers can improve a wine’s flavour and texture. Introduced in the mid-1990s, and a vital tool for larger producers is the Reverse Osmosis machine, which addresses the excess alcohol that results from high sugar levels in grapes.
In RO, the wine passes through a filter that blocks colours, tannins, and, flavours. The colourless and tasteless water and alcohol mixture are distilled to separate the alcohol from the water. The water is then recombined with the color, flavor, and tannins. The result: a small batch of wine with reduced alcohol. This small batch is usually blended back into the rest of the wine, thereby diluting the alcohol without losing any of the flavour elements.
“The main use of the RO machine is to find a sweet spot for a wine,” says Caldwell. The Pellenc company attracted a lot of interest with a mechanical harvester that has fruit-sorting capabilities. Pellenc’s Selectiv system is not only a mechanical harvester, but it also destems and removes material other than grapes.
Other innovations include the increasing use of biodynamics (although the science has been questioned); while organic farming focuses on limiting synthetic inputs, like chemical fertilizers, biodynamic farming looks at the farm and surrounding land as an ecosystem to determine the best ways to control pests and get the best yields.
Essentially, biodynamic farming uses organic methods, but is more big-picture focused, treating the land and the farm’s micro-climates as living things that need to be nurtured. Other advances may be of dubious benefit. While not yet as common as the wine cask (an Australian invention) canned wine is another packaging innovation that’s changing how we consume wine.
The use of screw caps rather than unreliable corks is now the norm in 95% of wines from Australia and New Zealand, while others have looked at the Vino-Lok glass stoppers, a German innovation.