What do you see and when?
- Stunted sub-clover plants, usually pale green in colour
- Seen in autumn and winter.
What could this indicate?
- Soil acidity and associated high soil aluminium
- Soil borne diseases
- Caused by four main pathogens (Phytophthora, Pythium, Aphanomyces, Rhizoctonia).
What test can I do to confirm?
- Soil test, with reference to pH and aluminium.
- Test strips with lime. Note, lime responses are often not seen in the first year, especially if lime is not incorporated.
- Inspect roots. Hostile soil conditions will result in stunted roots with less fine roots.
- Diseased roots are commonly yellow in colour with reduced or pruned branches and may also have brown/ black lesions.
- Test strips of foliar fungicide such as Phosphorus acid.
- Predicta B to identify pathogen presence.
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