Cork Spot
Abiotic Abiotic disorder
This profile contains basic abiotic disorder data. Regional field notes and expert review are in progress.
Quick Reference
Symptoms
Small sunken areas that are greener than the surrounding tissues, especially near the calyx end. The d'Anjou pear gets a bumpy uneven appearance on the lower half of the fruit. These areas may be more yellow than other areas. Brown corky lesions can be seen in the flesh when cut but may be symptomless on the surface. Depth and shape of the corking spots will give diagnostic clues as to the cause. Cork spot (calcium deficiency) has spots deeper into the fruit than a brown marmorated stink bug could reach with its mouthparts (1 cm or less from the surface). Stink bug caused cork spots are shallow and have irregular (but not square) shape. The boron deficiency spots tend to be square and flat-bottomed.