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: Lenticel Blotch Pit   

Lenticel Blotch Pit

Lenticel blotch pit is similar in appearance to both lenticel breakdown and bitter pit. Lenticel blotch pit has irregular patches around the lenticels, unlike the more defined circles found in lenticel breakdown; and are usually near the calyx end as in bitter pit, or on the more sun-exposed side of the fruit. Unlike lenticel breakdown, the flesh browning may extend deeper, as with bitter pit, and will likely increase and deepen after harvest. Hastening ripening will increase symptoms.

Figure 1: Fuji apple showing lenticel blotch pit on the lower half of the fruit.

Figure 2: Cutting through a blotch exposes corky tissue browning similar to bitter pit.

Lenticel Blotch Pit





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