Basic Seed Farms (BSF) are the backbone of NSSO’s existence as an organization and also   for the sericulture industry as they maintain the stock of pure authorized silkworm breeds apart from generating and supplying basic seed cocoons for the production of commercial dfls  of high quality since the supply chain at the level of NSSO originates from BSFs. These BSFs are the only source of basic seed for all the commercial seed production agencies in the country, as they meet the entire basic seed requirement, both of NSSO and the state sericulture departments. NSSO has 16 well-organized BSFs setup in different parts of the country covering P3, P2 and P1 levels for downstream basic seed multiplication. The basic seed multiplication system has a greater impact on the quality of commercial silkworm seed produced. It is said that quality of good seed is a reflection of the sound seed production system and a good harvest of commercial cocoons would in turn be a reflection of good quality seed. The breeders’ stock is maintained at the research Institutes and the multiplication of breeders’ stock is undertaken at P4 station. Down the line, multiplication of P3 (great grandparent) and P2 (grand parent) levels are done in Basic Seed Farms of NSSO. The maintenance and multiplication of P3 and P2 basic seed is very important from the quality seed production point of view. Therefore, adoption of one way system of multiplication is highly crucial in terms of quality seed production. Though the silkworms are reared in the same method at P3, P2 and P1 levels, the care taken in the maintenance and multiplication at each stage and the system of rearing is different for each level.

Currently basic seed maintenance and multiplication is carried out in the Government sector in the country and NSSO is entrusted with this work along with the responsibility of meeting the basic seed requirement of different agencies involved in commercial seed production. NSSO Head Quarters is involved in meticulous planning, monitoring, coordinating and evaluating the programmes implemented at these farms regularly on a day-to-day basis.


To maintain high yielding mulberry varieties for production of quality leaf suitable for seed crop rearing by following scientific package of practices and also maintain and multiply basic seed of authorized silkworm breeds true to breed characters for downstream multiplication.


Activities of Basic Seed Farms

  • To maintain and multiply basic seed of authorized silkworm breeds, true to the original characteristic of the breed for downstream multiplication.
  • To generate quality parental seed cocoons and address the problem areas for excellence in F1 seed production through SSPCs.
  • Maintaining high yielding mulberry varieties by replacing the old varieties in a phased manner.
  • Follow package of practices for mulberry cultivation recommended by Research Institutes
  • Systematic multiplication of approved races true to their breed characteristics.
  • Rearing of silkworm breeds on scientific lines.
  • Multiply the stock and produce basic seed, as per requirement