Birch > Trunk/Branches > Unusually colored area on branch/trunk
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Leaf and shoot blight
- Black sunken cankers occur on bark of infected branches
- Infections on young shoots cause branch tips to curl over in the form of a Shepard's crook
- Leaves wilt, die and remain attached to the branch when the canker completely girdles the branch
- Occurs only on yellow birch
- More information on Leaf and shoot blight...
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Coral spot canker
- 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
- More information on Coral spot canker...
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Perennial nectria canker
- 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...