crown rust

noun

, Plant Pathology.

1. a disease of oats and other grasses, characterized by the formation, on the leaves, of orange or black spores, caused by a rust fungus, Puccinia coronata.

Word History and Origins

Origin of crown rust¹

First recorded in 1895–1900

Example Sentences

In oats, crown rust, stem rust, barley yellow dwarf virus, oat smut, and other diseases are seen in North America.

From The Verge