Brown Spots Inside Green Apples: Disease or Physiological Issue?

Possible Causes

Internal brown spots on some apples (while others on same tree are fine) suggest:

• Bitter rot, anthracnose, or scab—fungal diseases.
• Physiological disorder—like cork spot or Jonathan spot from calcium imbalance.
• Insect damage—stink bug feeding creates corky spots.

Next Steps

1. Send clear close-up photos of cut fruit to your extension service.
2. Compare with Google Images for the diseases above.
3. Sanitation: Remove all fallen fruit and leaves each fall to reduce disease carryover.

Multi-Graft Tree Note

Since only one variety (green apples) is affected, it's likely variety-specific susceptibility, not a whole-tree issue.