Gangrene

Symptoms

Symptoms first appear as small dark depressions associated with wounds, eyes or lenticels. The depression can enlarge to form larger irregularly shaped areas. Gangrene also causes an internal rot beneath the superficial depressions, which is characterised by extensive cavities with walls which are discoloured and lined by dark grey or pinkish-purple strands of the fungus. The extent of the internal rots is not related to the size of the diseased area on the surface, and it is common to find relatively minor surface damage masking extensive internal damage.