Development of different egg preservation schedules for “Barpat”, an univoltine race of the Mulberry Silkworm, Bombyx mori L.

摘要

 A study was conducted at Silkworm Seed Technology Laboratory, Kodathi, Bangalore, to evaluate a tropical univoltine race “Barpat” by preserving the eggs for 4, 6, 8 and 10 months preservation schedules following 10, 20, 40 and 60 days aestivation period respectively. The results indicated that fecundity ranged from 406 to 566, hatching ranged from 77 to 85%, effective rate of rearing (ERR) ranged from 8855 to 9800, pupation from 92.18 to 93.19%, cocoon weight from 1.243 to 1.374 g, cocoon shell weight from 0.203 to 0.224 g and cocoon shell percentage ranged from 15.13 to 17.37 %. Further studies are in progress to utilize the univoltine race as male parent with indigenous multivoltine races namely, Pure Mysore, Sarupat and Nistari to know the feasibility of utilization of univoltine race in order to get sustainable cocoon crops in the field.