There is no economical way of eliminating the clubroot organism from fields once infested. Therefore, it is essential to prevent the introduction of the pathogen. Clubroot of Cabbage Clubroot of Rutabaga copyright images from Queen's Printer for Ontario used with permission Prevention and Management Never plant infected transplants into a clean field. Avoid southern field-grown transplants. Choose well-drained sites, free of the clubroot pathogen for crop production.
Alkaline soils limit clubroot infection.
Commercial control is often achieved by raising the pH of a field above 7.2 with a combination of crushed lime-stone and hydrated lime. Raise the pH above 6.8 by applying crushed limestone six months prior to planting crucifers. Then apply 1,500 pounds of hydrated lime at least six weeks before planting to elevate the pH to 7.2 or more. This information was developed for conditions in the Northeast. Use in other geographical areas may be inappropriate.