Tree Fruit Research & Extension Center

Cullage Assessment & Education

Quick Identification Guide to Apple Postharvest Defects & Disorders

Physiological Disorders

The Physiological Disorders section of the card set includes most the common disorders of physiological origins found during the sorting and packing of Washington apples. Bitter pit, scalds and lenticel conditions are just a few of the items presented in this section. At a later date more cards may be developed for this section which would include any emerging or reclassified disorders. For ordering information visit the Order Information section of the Introduction. The cards shown on this site are slightly modified to accomodate web formatting. Figures may appear fragmented in some browsers. Please report viewing problems here. Any reproduction of the card images or content without permission is in violation of WSU Copyright policies.

 

 

PHYSIOLOGICAL: Core Fush  

Core Flush

Core flush, a form of senescent breakdown is common in Granny Smith, Braeburn, and other apple varieties. The core area turns pink, then brown. The discoloration starts near the core and extends with wedges of brownish tissue outward. The discoloration may circle the core partially or completely. The affected tissue is moist and softer than unaffected tissue. In severe cases, it may extend just below the skin. There is no exterior symptom.

 

Figure 1: Core flesh starts to turn pink.

Figure 2: The pink gradually turns brown.

Core Flush

 

 

 

 

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