Esca disease complex of grapevine in Montenegro: incidence, economic importance, variety sensitivity, and identification of the pathogens
Published 2026-03-23
Keywords
- vineyard,
- autochthonous varieties,
- Fungi,
- Grapevine trunk diseases
How to Cite
Copyright (c) 2026 Bogoljub KANDIĆ , Christos TSOUKAS , Jelena LATINOVIĆ , Epaminondas J. PAPLOMATAS , Nedeljko LATINOVIC

This work is licensed under a Creative Commons Attribution 4.0 International License.
Abstract
Grapevine cultivation in Montenegro has long historical and economic significance, with wine being a key trade product. However, under Montenegrin agroecological conditions, grapevine cultivation is increasingly threatened by plant diseases, particularly the Esca disease complex (EDC) which is the most economically damaging among grapevine trunk disease. A 4 year survey from 2021 to 2024 confirmed presence of EDC in all Montenegrin winegrowing regions, as Grapevine Leaf Stripe Disease (GLSD) and apoplexy. Symptom severity varied by grapevine variety and vineyard age, with the greatest incidence in vineyards aged 30–35 years. The indigenous varieties Vranac and Kratošija were more susceptible than introduced varieties (Syrah, Merlot, Chardonnay, Cabernet Sauvignon). Laboratory analyses of symptomatic trunks yielded numerous isolates of endophytic microorganisms. Preliminary identification of these, based on morphology, and molecular PCR diagnostics targeting the ITS rRNA genomic region, plus analyses of the partial tub2 and tef1-α genes, identified three key fungi responsible for EDC in Montenegro: Phaeoacremonium minimum, Phaeomoniella chlamydospora, and Fomitiporia mediterranea. In the investigated vineyards, numbers of empty places remaining after removal of dead grapevines varied, depending on vineyard age and grape variety. In a 21-year-old vineyard where dead vines were not replaced, vine loss of 32%, and direct yield reduction of 44%, were recorded, highlighting the substantial economic impact of esca disease.
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