A disease of strawberries caused by the fungus Phytophthora fragariae, which causes the roots to rot off from the tip upwards, the central part being often stained a deep red.
Origin
1930s.
Definition of red core in US English:
red core
(also red core disease)
noun
A disease of strawberries caused by the fungus Phytophthora fragariae, which causes the roots to rot off from the tip upwards, the central part being often stained a deep red.