Speckled tar spot
- Latin name: Rhytisma punctatum (Pers.:Fr.) Fr.
- French name: Tache goudronneuse ponctuée
- Division: Ascomycota
- Class: Leotiomycetes
- Synonym(s): Melasmia punctata Sacc. & Roum.
Description
Micro-habitat(s)
Leaf
Distribution
Canada
Damage, symptoms and biology
Stromata appear as "tar spots" on roughly circular areas of chlorotic leaf tissue.
The major impact of this disease is a reduction in the aesthetic value of ornamentals.
Other information
Raking up and destroying dead leaves in the fall will reduce the severity of the disease.
Canadian Forest Service Publications
Information on host(s)
Main host(s)
Bigleaf maple, Manitoba maple, mountain maple, silver maple, striped maple
Secondary host(s)
Photos
Stromata of Rhytisma punctatum on bigleaf maple CFS