Slow Dieback of Grapevine in South Africa: Stress-Related Predisposition of Young Vines for Infection by Phaeoacremonium chlamydosporum

  • J.H.S. Ferreira ARC-Fruit, Vine and Wine Research Institute, Nietvoorbij Centre for Vine and Wine, Private Bag X5026, 7599 Stellenbosch, South Africa
  • P.S. van Wyk ARC-Grain Crops Institute, Private Bag Xl251, 2520 Potchefstroom, South Africa
  • F.J. Calitz ARC-Agrimetrics Institute, Private Bag X5013, 7599 Stellenbosch, South Africa
DOI: https://doi.org/10.21548/20-2-2228

Abstract

Phaeoacremonium chlamydosporum causes slow dieback of nursery vines and young vines in vineyards. In a greenhouse trial it was observed that significantly more inoculated Chenin blanc vines grafted onto rootstock 101-14 Mgt, and subjected to water stress, exhibited dieback symptoms. More plants eventually died compared to inoculated vines not subjected to stress.  Inoculation technique (stem inoculation vs soil inoculation) did not significantly affect disease incidence. Extensive plugging of the xylem tissue in inoculated plants was observed, eventually leading to slow dieback of these vines.

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Published
2017-05-04
Issue
Vol. 20 No. 2 (1999)
Section
Articles

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