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. All educational programs conducted by Ohio State University Extension are available to clientele on a nondiscriminatory basis without regard to race, color, creed, religion, sexual orientation, national origin, gender, age, disability or Vietnam-era veteran status. Keith L. Smith, Associate Vice President for Ag. Adm. and Director, OSU Extension.