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Medicinal Yam

Aphids

Symptoms of damage

Aphids cause damage to young seedlings
Nymph and adults suck the sap from leaves and stems of young vines.
As a result, new growth is adversely affected.

Identification of pest

Globular yellowish green to brown or black in colour.

Management

Spray neem oil 0.5% (or) NSKE 5%.
Conserve natural enemies like parasitoids and predators

Red spider mite

Symptoms of damage

Red spider mites are found to infest laminary base adjoining petiole
Development of necrotic areas on the upper surface of the leaf lamina
Feeding injury predisposes the plant for fungal infection in D. floribunda and D. composita.

Identification of pest

Nymphs and adults are red in colour.

Eggs are laid on the ventral surface of the leaves and are whitish, spherical in shape

Management

Spray wettable sulphur 50 WP 2g/lit.