white rust

noun

1. Plant Pathology. a disease of plants, characterized by pustules of white spores on affected parts that become yellow and malformed, caused by fungi of the genus Albugo.
2. any fungus of the genus Albugo.

Word History and Origins

Origin of white rust¹

First recorded in 1880–85

Example Sentences

Footnote 81: Florida tobacco is noted for the white rust found on the leaves.

From Project Gutenberg