crown rust

American  

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.

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Etymology

Origin of crown rust

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.

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