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Bitter pit
Physiological plant disorder / From Wikipedia, the free encyclopedia
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Not to be confused with Bitter rot of apple.
Bitter pit is a disorder in apple fruits, now believed to be induced by calcium deficiency. It occurs less commonly in pears.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/0/0c/Malus_domestica_%27Summerred%27_bitterpit%2C_kurkstip_%28c%29.jpg/640px-Malus_domestica_%27Summerred%27_bitterpit%2C_kurkstip_%28c%29.jpg)
The disease was probably first reported in Germany where it was known as Stippen.[1] It was also known as "Baldwin spot" and "blotchy cork" in North America. The name "bitter pit" was first used by Cobb in Australia in 1895.[2] The disease has been shown as non-pathological and is now known as a disorder. When it occurs on the tree, it is known as "tree pit"; it may also occur in storage, when it is known as "storage pit".