Nematode suppression relies upon turning under large amounts of green matter with high glucosinolate levels. The sulphur containing compounds in the crop residues break down into chemicals very similar to commercial fumigants. The glucosinolate levels vary greatly among varieties. Clubroot disease and cabbage root maggot can affect many of this type of cover crop. Nematode suppressing varieties are usually more expensive.
Seed is available.
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