white rust

American  

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.

---

Etymology

Origin of white rust

First recorded in 1880–85

Example Sentences

The plant had been the site of tension between the growing Latino community working in the meatpacking plants and the surrounding white rust belt community.

From The Guardian

One, commonly called white rust, a disease of the leaves, attracts mycologists in collecting, but it has never been of serious economic importance.

From Project Gutenberg

These plants resemble quite closely the white rusts, and are probably related to them.

From Project Gutenberg

They soon come to rest, and germinate in the same way as those of the white rusts and mildews.

From Project Gutenberg

Occupying the bottom of the cup are closely set, upright filaments, each bearing a row of spores, arranged like those of the white rusts, but so closely crowded as to be flattened at the sides.

From Project Gutenberg