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Government Of Assam Handloom Textiles & Sericulture Directorate of Sericulture

Silkworm Seed Technology
Home ❯ Silkworm Seed Technology ❯ Special Advantages of Hybrids

Special Advantages of Hybrids

Both hatching and larval growth are improved and the larval period is reduced.

Silkworm gain resistance, become strong and can survive in adverse climatic conditions.

Cocoon productivity increases along with the single cocoon and single shell weight.

Silk filament becomes thick and long.

NORMS OF SEED COCOONS REQUIRED TO PRODUCE QUALITY BIVOLTINE HYBRID SEED

Production of quality bivoltine hybrid seed can be achieved by using bivoltine parent seed cocoons with following parameters :

  1. Free from pebrine disease.
  2. Free from mixing of another race.
  3. Pupation rate of 80 % and above.
  4. Yield per 100 dfls is 45 kg and above.
  5. Average single cocoon weight of 1.55 g to 1.75 g i.e., 570 to 650 cocoons per kg.
  6. Production of quality bivoltine hybrid seed can be achieved by using bivoltine parent seed cocoons with following parameters : Free from pebrine disease.
  7. Free from mixing of another race.
  8. Pupation rate of 80 % and above.
  9. Yield per 100 dfls is 45 kg and above.

Average single cocoon weight of 1.55 g to 1.75 g i.e., 570 to 650 cocoons per kg.

Production of quality multivoltine hybrid seed can be achieved by using multivoltine parent seed cocoons with following parameters :

  1. Free from pebrine disease
  2. Pupation rate of 90 % and above.
  3. Yield per 100 dfls is 42 kg and above.
  4. Average single cocoon weight of 1.00 g