Cork Spot
Non-pathogenic (calcium deficiency)
4 host plants
Last updated
Data Coverage 3 of 6 dimensions
Cork spot creates dark, corky lesions on fruit and leaves of affected plants. You notice brown, raised spots that disfigure produce and foliage. The condition may be physiological or disease-related. Proper nutrition, water management, and cultural practices help reduce incidence.
For Anjou, lower calcium rates are recommended than those for correcting bitter pit in apple because there is a risk of marking the fruit. Prune lightly by thinning out branches rather than by heading.
Quick Reference
Causal Agent
Non-pathogenic (calcium deficiency)
Host Plants
4
Management
Cultural Controls
- For Anjou, lower calcium rates are recommended than those for correcting bitter pit in apple because there is a risk of marking the fruit.
- Prune lightly by thinning out branches rather than by heading.
- Head new shoot growth in summer on an overly vigorous tree.
- This may be done up until a month before harvest.
- Apply five (5) summer sprays about 1 month apart of calcium chloride or calcium nitrate at not more than 5 lb/100 gal.
- Add a surfactant to all sprays to reduce the possibility of burning.