Perennial nectria canker
- Early canker symptoms are small and difficult to see, usually forming a darkened, depressed area beneath smooth, young bark
- Sunken round to oval cankers with target shaped ridges of barkless wood on large branches or main trunk
- Red to reddish orange raised cushion like bumps can occasionally be seen on the edge of the canker
- Dead branches and twigs killed by girdling cankers
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