Slow Dieback of Grapevine: Association of Phialophora parasitica with Slow Dieback of Grapevines

  • J.H.S. Ferreira Nietvoorbij Institute for Viticulture and Oenology (Nietvoorbij), Private Bag X5026, 7599 Stellenbosch, Republic of South Africa
  • P.S. van Wyk Grain Crops Institute, Oil and Protein Centre, Private Bag X1251, 2520 Potchefstroom, Republic of South Africa
  • E. Venter Plant and Quality Control, Private Bag X5015, 7599 Stellenbosch, Republic of South Africa
DOI: https://doi.org/10.21548/15-1-2276

Abstract

Phialophora parasitica was consistently isolated from vines showing symptoms of slow dieback and decline. Pathogenicity tests were conducted on in vitro plantlets, grafted plants in a glasshouse and on graft unions. The fungus caused discolouration of wood as well as extensive plugging of xylem tissue.  Plugging material seemed to be of gum as well as parenchyma origin.  Callusing of graft unions was negatively affected.

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Published
2017-05-05
Issue
Vol. 15 No. 1 (1994)
Section
Articles

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