Heart rot of cabbage (Brassica oleracea) caused by a severe calcium deficiency.	Heart rot of cabbage (Brassica oleracea) caused by a severe calcium deficiency.	Heart rot of cabbage (Brassica oleracea) caused by a severe calcium deficiency.	Pineapple (Ananas comosus) heart rot disease, caused by the plant pathigen, Phytophthora parasitica.
Necrotic heart leaves pulled easily from a a pineapple (Ananas comosus ) plant suffering from pineapple heart rot disease, caused by the plant pathogen, Phytophthora parasitica.	Foliar symptoms (wliting and death of heart leaves) of coconut heart rot disease on coconut (Cocos nucifera) palm, caused by the plant pathogen, Phytophthora katsurae.

Definition

Heart rot is a disease symptom characterized by extensive necrosis and decay in the heart of a plant.