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Bitter pit
Bitter pit is a disorder in apple fruits, now believed to be induced by calcium deficiency. It occurs less commonly in pears. The disease was probably first reported in Germany where it was known as ''Stippen''.〔Jaeger, G (1869) Uber das Peliz oder Stippinwerden Kernobstfrucht. Illus. Monash obst u-Weinbau 16: 16 : 318-319.〕 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.〔Cobb, N.A. (1895). Diseases of plants and their remedies. 11. Bitter Pit of apples. Agric. Gaz.N.S.W. 6 : 859-861.〕 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". == Symptoms == The affected fruit have dark spots, about ½ cm diameter, which occur on the skin and/or in the flesh The cells in the spots are dead (necrotic), and turn brown-black.〔http://postharvest.tfrec.wsu.edu/marketdiseases/bitterpit.html〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Bitter pit」の詳細全文を読む
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