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Clubroot affects plants within the brassica family.  Plants are stunted as a result of tumour like growths on their roots.

It is a soil-borne disease and is becoming more prevalent and problematic in oilseed rape crops with shorter time periods between the rotations.

Crops grown in wet fields, with a low pH are at greater risk of infection.  Flooding can cause disease spread.  Managing soil structure and drainage can help towards disease management, as can regular soil sampling and pH management.

AHDB Cereals & Oilseeds funded research has reported a yield loss of 0.03 t/ha per 1% of plants infected.

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