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Soil Fungi Linked to Insect-Associated Decline of Resistant Rootstocks

Scientists suggest that disease-causing fungi are spread by phylloxera as they taste and probe among feeder roots and older storage roots of grapevines.
Mar 2005 Issue of Wine Business Monthly
Although the destructive phylloxera insects have been reported feeding on grape rootstocks in several declining Northern California vineyards, the cause of the damage appears to be fungal activity rather than the loss of rootstock resistance, report researchers at UC Davis.The scientists suspect that disease-causing fungi, spread by phylloxera, are responsible for the weakened vines at some previously infected vineyard sites. The research results suggest these fungi are spread by phylloxera as t...
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