Localized areas of destruction occurring on plants that have been infected by a virus are referred to as necrotic lesions.
Necrotic tissue is the result of skin necrosis. Necrosis is a premature death of cells that occurs due to autolysis (self-digestion of cells after the release of enzymes). These cells are a part of the living tissue inside the skin. Necrosis occurs due to external injury or trauma in a particular organ.
Necrosis can be caused by a number of external sources, including injury, infection, cancer, infarction, poisons, and inflammation. Black necrotic tissue is formed when healthy tissue dies and becomes dehydrated, typically as a result of local ischemia.
Treatment can slow the progress of avascular necrosis, but there is no cure. Most people who have avascular necrosis eventually have surgery, including joint replacement. People who have avascular necrosis can also develop severe osteoarthritis.
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