Cultural control or club root

Once club root is present in the garden, it is nearly impossible to eliminate. Take steps to avoid introducing the disease by purchasing plants from a guaranteed, club root-free supplier.

If the disease is present, the following can be done to protect plants from infection:

- Grow seedlings to a robust size prior to transplanting into the garden. Transplant in pots of a least 9cm in diameter so the roots grow into affected soil with a larger than usual, healthy root system.

- Disinfect any tools and equipment, including footwear, after use.

- Raise the soil pH as this reduced the effects of club root.

- Ensure there is adequate soil drainage.

- Promptly remove susceptible weeds like charlock, shepherd's purse, and wild radish.

- Use club root-resistant cultivars. 

* Brussels sprouts - 'Crispus', 'Cryptus'

* Calabrese - 'Monclano'

* Cauliflower - 'Clapton', 'Clarify'

* Cabbages - 'Kilaxy', 'Kilazol', and 'Kilaton'

* Kale - 'Tall Green Curled'

* Swede - 'Marian'