Grapevine death caused by <i>Nattrassia toruloidea</i>

Authors

  • G. Granata
  • A. Sidoti

DOI:

https://doi.org/10.5073/vitis.1991.30.219-222

Keywords:

fungus, pathogen, variety of vine, rootstock, leaf, wood, necrosis, toxicity, etiology, symptomatology, Italy

Abstract

Severe decline has been observed on different grapevine cultivars (Vitis vinifera L.) grafted on rootstock hybrid 140 R.(V. berlandieri PLANCHON x V. rupestris SCHEELE) in various plantations in eastern and central Sicily. The affected grapevines presented chlorotic leaf spots and necrosis. Early leaf cast was followed by drying of the shoots from the apex and darkening of subcortical tissues. The whole grapevine died 2 or 3 years after onset of leaf symptoms.
The fungus Nattrassia toruloidea (NATTRASS) DYKO and SUTTON was constantly isolated from the infected wood. Artificial inoculation of the isolate on rooted cuttings of the local cultivars Nerello Mascalese and Frappato di Vittoria reproduced the disease observed in the field.
The fungus was reisolated from the artificially inoculated plants, confirming that N. toruloidea is the specific pathogenic agent responsible for the grapevine death observed by us. The most suitable temperature range for growth of this pathogen is 30-35°C which explains its distribution in hot African and Asian countries, its presence in Sicily and its widespread diffusion during the summer season.

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Published

2015-10-22

Issue

Vol. 30 No. 4 (1991): Vitis

Section

Article

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