First Paragraph: The destruction of California vineyards planted on AXR#1 rootstock by biotype B phylloxera, as well as the continued infestation of own-rooted vineyards, began a revolution in rootstock use in coastal and northern winegrape regions. The soils in these regions are ideal for phylloxera infestation, but the nearly complete reliance upon AXR #1 and St. George over the past 25 years has left viticulturists with little experience on which to base their selection of other rootstocks.
