Peronospora farinosa f.sp. betae is a forma specialis of Peronospora farinosa, attacking sugar beet.
| Peronospora farinosa f.sp. betae | |
|---|---|
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| Leaves infected by Peronospora farinosa f.sp. betae | |
Scientific classification 
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| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Stramenopiles |
| Phylum: | Oomycota |
| Order: | Peronosporales |
| Family: | Peronosporaceae |
| Genus: | Peronospora |
| Species: | |
| Subspecies: | P. f. f.sp. betae
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| Trinomial name | |
| Peronospora farinosa f.sp. betae Byford, (1967)
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| Synonyms | |