Coin Canker
Nectria cinnabarina
9 host plants
Last updated
Data Coverage 2 of 6 dimensions
Coin canker appears as distinctive round or oval lesions on tree bark. You see well-defined circular cankers that enlarge annually. The fungus enters through wounds created by pruning or weather damage. Remove infected branches and prevent mechanical injury to avoid infection.
Prune out cankered branches at least six inches below visible symptoms, making cuts into healthy wood. Sterilize your tools between cuts. Canker pathogens typically enter through wounds, so minimize pruning injuries and avoid working on trees when bark is wet. Maintain tree vigor through proper watering and avoid stress from drought or compacted soil, which makes trees more susceptible.
Quick Reference
Causal Agent
Nectria cinnabarina
Host Plants
9
Host Plants (9)
Fraxinus americana White Ash, American Ash Fraxinus anomala Singleleaf Ash, Dwarf Ash Fraxinus excelsior Euopean Ash, Common Ash Fraxinus latifolia Oregon Ash Fraxinus ornus Flowering Ash Fraxinus oxycarpa Fraxinus oxycarpa Fraxinus pennsylvanica Green Ash Fraxinus quadrangulata Blue Ash Fraxinus sieboldiana Siebold Ash, Japanese Flowering Ash, Chinese Flowering Ash