Clubroot disease
- kingdom: Chromista
- phylum: Cercozoa
- class: Phytomyxea
- order: Plasmodiophorida
- family: Plasmodiophoridae
- genus: Plasmodiophora
- species: Plasmodiophora brassicae
Amherst Center
MassachusettsHighland Park
New Brunswick
New Jersey
United States