Management:
- Rot first appears on the calyx end of the fruit as a firm, black, metallic-like spot with concentric rings.
- Typical decay spots are circular and medium brown
- Reddish border and appear anywhere on the apple surface.
- Treatment of fruits with linseed oil or mustard oil or castor oil
Image source:
| Black concentric rings | Decayed brown spots | Reddish border |