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.

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Etymology

Origin of white rust

First recorded in 1880–85

Example Sentences

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

From Northern Nut Growers Association, Report of the Proceedings at the Fourth Annual Meeting Washington D.C. November 18 and 19, 1913 by Northern Nut Growers Association

Zones of distribution, 270.Zoospores of Cystopus, 38. white rust, 151.Zygospores of Mucor, 158, 164.

From Fungi: Their Nature and Uses by Cooke, M. C. (Mordecai Cubitt)