Yam mosaic disease (Yam mosaic virus. Vector: Aphis gossypii)

Symptoms

• Irregular patches of light and dark green or yellow on leaves and flowers.
• These patches usually appear on younger leaves.
• The affected leaves may become smaller, curled, or wrinkled.
• The veins might look lighter than usual or have bands of dark green or yellow.
• Plants often end up smaller, twisted, and stunted.
• Infected tubers might turn brown inside and develop brown nodules.

Management

• Avoid planting a single cultivar in a large area.
• Rouge out and destroy affected plants.
• Use disease free corms.
• Control the vector.

Chemical Control

Extremely Toxic

Highly Toxic

Moderately Toxic

Slightly Toxic