| Albugo occidentalis | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Stramenopiles |
| Phylum: | Oomycota |
| Order: | Albuginales |
| Family: | Albuginaceae |
| Genus: | Albugo |
| Species: | A. occidentalis
|
| Binomial name | |
| Albugo occidentalis G.W. Wilson, (1907)
| |
| Synonyms | |
|
Cystopus occidentalis (G.W. Wilson) Sacc. & Trotter, (1912) | |
Albugo occidentalis, the causal agent of spinach white rust, is an oomycete plant pathogen, although some discussions still treat it as a fungal organism. Albugo occidentalis is one of the most important spinach diseases in North America, found throughout the United States east of the rocky mountains.