1 white rust | Definition of white rust
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white rust

noun

Definition of white rust

: any of various diseases of chiefly cruciferous plants caused by a fungus (genus Albugo) and marked by white spore-filled lesions also : a fungus causing white rust

First Known Use of white rust

1815, in the meaning defined above

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More from Merriam-Webster on white rust

Britannica.com: Encyclopedia article about white rust

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