Which of the following is NOT a seed-borne disease?

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RRB JE Previous Paper 5 (Held On: 23 May 2019 Shift 3)
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  1. Red rot of sugarcane 
  2. Sheath rot on rice 
  3. Potato mosaic
  4. Moulting of wheat 

Answer (Detailed Solution Below)

Option 3 : Potato mosaic
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  • Potato mosaic is NOT a seed-borne disease.
  • It is a disease caused by a virus which affects the potato plant.
  • Generally, mosaic viruses that infect potatoes are transmitted by aphids.
  • They feed on the sap of infected plants and transmit the virus to healthy plants
  • There are many different types of mosaic diseases that attack the potato crop.
  • Most of the time, as the name suggests, the leaves show green and dark green mosaic patterns.
  • The leaves may also show faint yellow patches on the leaves.
  • The attacked or affected plants remain stunted and sick.
  • The disease also affects tubers and their Size and numbers are reduced.
  • In some other times, the leaves may show necrosis of tissues along the vein. 
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