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Polyphagous root knot nematode

occurs in warm areas.

Damage is serious in sandy soils.

Nematode attacks increase the

incidence of bacterial wilt,

fungal wilt and other pathogens.

Root knot nematode of potato (Meloidogyne spp)

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Symptoms:

Above ground symptoms are not specific.

Weak top growth and small chlorotic leaves that wilt quickly in warm weather.

Tubers also show galls, deformations.

Severe attack causes early death of infected plants.

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It causes serious damage to the potato crop. Its prevalence

in India was reported during 1960s from Nilgiri hills

Golden nematode of potato (Globodera rostochiences)

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Symptoms:

Stunted growth and sickly

appearance of the plants in

patches.

Loss in vigour of plants, similar to

mineral deficiency.

Roots show shallow bushy

appearance.

Underground symptoms include

presence of galls on the roots and

pimple like structures on tuber.

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Infected plants should be uprooted and burnt as soon

as detected in the field.

Organic amendment of soil to reduce the nematode activity in the soil. Use resistant variety like Kufri Swarna.Deep ploughing during summer months.Crop potato with non host crop for at least two years.Strict quarantine measures particularly in Nilgiri hills for golden nematode disease.

Management (Golden nematode & Root Knot nematode

disease)

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