In course-textured soils, increasing the pH can result in boron deficiency. This may be alleviated by application of boron in transplant water or as a foliar spray. With transplanted crops, the use of pathogen-free seedbeds and uninfected plants is essential to prevent introduction of the disease. Application of a fungicide in transplant water or rototilled in a band prior to planting may help to reduce disease development. Clean and disinfect all machinery before moving it from infested to non-infested land.
Some resistant cultivars are available.
However, plant resistance has not been very useful in clubroot control because of rapid development of new races of the fungus. Crop rotation does not appear to help, since the fungus lives so long in the soil. When purchasing seedlings, inspect the plants for any signs of the disease before purchasing.