white rust

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white′ rust′

1. a disease of plants characterized by pustules of white spores that become yellow, caused by fungi of the genus Albugo.
2. any of these fungi.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.white rust - fungus causing a disease characterized by a white powdery mass of conidia
Albugo, genus Albugo - type genus of the Albuginaceae; fungi causing white rusts
fungus - an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia