Apple canker is a fungal disease causing disfiguring and sunken patches of dead bark on the branches of apple and some other trees. Infections often begin at wounds or buds.
Scientific name Neonectria ditissima (syn. Neonectria galligena, Nectria galligena)
Plants affected Mainly apples
Main symptoms Round or oval areas of dead, sunken bark
Caused by Fungus
Timing New cankers form from mid-spring
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