Dutch elm disease continues to reshape urban forestry decisions across Poland. This resource tracks disease patterns, resistant cultivar performance, and municipal tree replacement programs.
Recent Articles
Current information on elm disease monitoring, cultivar trials, and municipal responses in Polish cities.
Disease Biology
The pathogen Ophiostoma novo-ulmi moves through root grafts and bark beetle galleries. Understanding both transmission routes shapes effective containment strategies.
May 2026
Cultivar Selection
Breeding programs in the Netherlands and the United States have produced cultivars with confirmed resistance. Performance in Polish urban conditions varies by site and climate zone.
May 2026
Urban Programs
Several Polish municipalities have begun systematic replacement of lost elm canopy. The approaches differ by city size, budget, and target species selection.
May 2026
Quick Reference
| Transmission route | Vector / mechanism | Season |
|---|---|---|
| Bark beetle galleries | Scolytus spp. | Spring–Summer |
| Root graft contact | Direct fungal spread | Year-round |
| Infected wood transport | Human activity | Year-round |
Early symptoms typically appear in late spring: wilting of leaves on individual branches (flagging), followed by yellowing and brown streaking under the bark. A cross-section of an infected twig reveals dark brown staining in the outer wood ring.
Once wilting is visible, the infection has usually been present for several weeks. Prompt removal of infected material reduces spread through root networks where neighboring trees share grafted root systems.
Contact
Questions about elm disease monitoring, cultivar suitability, or urban tree management in your municipality can be directed through this form.