Galls and egg masses on fibrous roots (left) compared with normal roots (W. Martin, APS).

Cracking on storage roots (G. Lawrence, APS).

Diagnostic summary

• What you see on plants

- poor shoot growth, leaf chlorosis and stunting.

- galling of rootlets and severe cracking of roots on some varieties or formation of small bumps  or blisters on other varieties.

- severe longitudinal cracking of storage roots.

- brown to black lesions on flesh which are not evident unless  storage root is peeled. 

• Can be diagnosed by presence of pearl-like swollen female nematodes in flesh of storage roots or in fibrous roots.

• Worldwide in distribution.

• Usually occurs in warmer areas. 

Taxonomy

Economic importance

Geographical distribution

Morphology

Life cycle

Symptoms

Host range

Management

References

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