Q.26
The seed plot technique (SPT) of potato is specifically developed for the production of
- Seed Plot Technique (SPT) in Potato:
- Conceived and perfected by Dr. Pushkarnath in 1959 at the Central Potato Research Institute (CPRI), Shimla.
- Objective: Developed to produce virus-free seed tubers in the sub-tropical Indo-Gangetic plains of Northern India during the autumn/winter window (October to January).
- Mechanism: Exploits the low-aphid population period when vector density of Myzus persicae remains below the critical threshold of $20\text{ aphids per } 100\text{ leaves}$, coupled with dehaulming (cutting potato foliage) in late December/early January before aphid swarms arrive.
- Correct Option: Option 1 (Virus free seed tubers in plains).
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