Russeting

Russeting is a coverage of the skin with rough and slightly harder patches of greenish-brown colour (cork). It is usually limited to parts of the apple such as the stem area. But also the entire apple surface can be covered by a network of corky tissue. The russet occurs naturally, especially in certain varieties, and is usually already present at harvest. In rare cases, the russet can develop during storage. It does not harm the fruit but can make the apple look less attractive.