Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Birch > Unusually colored area on branch/trunk
Birch > Trunk/Branches > Unusually colored area on branch/trunk
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Coral spot canker
Nectria cinnabarina
- Raised cushion-like bumps on affected branches, may be cream
to orange or red, turn black with age - Sunken dark brown area on branch that is often cracked or has a ridge at the edge
- Dead branches and twigs are often first observed in early spring
- Common on trees stressed by drought, recent transplant or
other factors - More information on canker
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Perennial nectria canker
Neonectria galligena
- Red to reddish orange raised cushion like bumps can occasionally be seen on the edge of the canker
- Cankers do not have bark and raised ridges of wood occur in target-like rings within the canker
- Sunken target shaped cankers on main trunk or branches
- Dead branches and twigs killed by girdling cankers
- More information on Perennial nectria canker
