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Unidentified Fungus on Grapevine Roots

Possibly Linked to Yield Reductions Over Time
Jun 2002 Issue of Wine Business Monthly
Over the past several years we have noted the occurrence of a previously undescribed thin white 'crusty coating' on the roots of some grapevines that have shown a slow decline in fruit yield over a period of several years in well-managed vineyards. This white, dry, crusty material beneath and within a shredded periderm (bark) layer has been observed on dozens of samples of vines that frequently show chlorosis and signs of water stress after several days of hot weather during early summer. This i...
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