ring spot

noun

, Plant Pathology.

1. any of various plant diseases caused by a virus or fungus and characterized by concentric rings of discoloration or necrosis on the leaves.

Word History and Origins

Origin of ring spot¹

First recorded in 1905–10

Example Sentences

Viral genes have been used to protect papaya plants against the ring spot virus, for example, with no sign of resistance evolving in over a decade of use in Hawaii.

From Scientific American