Albugo candida

Albugo candida
On Shepherd's purse
Scientific classification
Domain: Eukaryota
Clade: Sar
Clade: Stramenopiles
Phylum: Oomycota
Class: Peronosporomycetes
Order: Albuginales
Family: Albuginaceae
Genus: Albugo
Species:
A. candida
Binomial name
Albugo candida
Synonyms

Aecidium candidum Pers. (1797)
Albugo cruciferarum (DC.) Gray (1821)
Cystopus candidus (Pers.) Lév. (1847)
Uredo candida (Pers.) Fr., (1832)
Uredo cruciferarum DC.

Albugo candida, commonly known as white rust or white blister rust, is an obligate plant pathogen in the family Albuginaceae that infects Brassicaceae species. (Although called a "rust" and a fungus, it is an oomycete.) It has a relatively smaller genome than other oomycetes.