The vineyards are now lush and green after several weeks of bright sunshine - well, part of the vineyards are green. In front of the winery you can see that dark hole in the vineyard developing again. That ever growing circle of brown among the green, that circle showing the progress of the phylloxera as they slowly, but surely kill our vines.
Fortunately it will not destroy all of our vineyards as all of our recent plantings are immune because they are planted on grafted rootstock. Only our historic vineyard, planted by Fred and Mary Benoit almost 30 years ago, will die. Visitors this spring can see the wide swath ripped out of our Riesling vineyard, which is being replanted over the next three years.
Phylloxera, native to America's east coast, is a root feeding aphid, which destroys the roots of the vines, killing them over a few years. However, they don't kill all vines, just the European Vitis Vinifera, which are responsible for most of the world's wines and all of its great ones. Indigenous American vines are immune to this root louse having adapted to it over the millenniums. In the late 1800's, phylloxera was transported to Europe on botanical samples of American vines and promptly set about almost completely devastating the vineyards of Europe. Nothing was discovered to destroy phylloxera, but scientists finally came to the solution of grafting Vinifera vines onto resistant American vine root stock. Even today this is the only solution and most of the world's wine grapes are grown on Vinifera vines grafted on American rootstock.
When Oregon's wine pioneers started planting vineyards here they did not believe that phylloxera would be problem and took a calculated risk by planting their Vinifera vines like Pinot Noir on their own roots instead of grafted rootstock. It was a bet they lost and over the next decades all of Oregon's oldest vineyards will have to be replanted as the phylloxera root louse makes its way across the state.
Recent Comments