red rot

noun

Definition of red rot

1 : a common sundew (Drosera rotundifolia)

2a : either of two diseases of sugarcane:

(1) : a destructive disease caused by a fungus (Physalospora tucumanensis) characterized by red patches within the canes and found also on sorgo

(2) : a rot of the leaf sheaths caused by a fungus (Sclerotium rolfsii)

b : a wood decay of various conifers and deciduous trees caused by various pore fungi

— called also red heart

c : adustiosis