Effect of Feeding Mixed Leaves of Different Mulberry Varieties on Economic Traits of Silk Worm Bombyx mori L.

All the economic traits of silkworm viz., larval weight (39.10 g), larval duration(22.83 days), pupal duration (10.22 days), cocoon weight (1.80 g), cocoon yield (17.35 kg), filament length (872 m), filament weight (0.26g) and moth emergence percentage (95.33) were found to be superior in case of those larvae which were reared on 100% leaves of V 1, S 1635 and mixed feed of 50% leaves of V1 and 50% leaves of S1635. Hence the varieties V 1 and S 1635 are used for increasing silk yield and improving all the economic characters of mulberry silkworm. While All the economic traits of silkworm viz., larval weight (34.83 g), larval duration (28.46 days), pupal duration(11.35 days), cocoon weight (1.32 g), cocoon yield (13.60 kg), filament length (688 m), filament weight (0.22 g) and moth emergence percentage (84.66) were found to be inferior in case of those larvae which were reared on 100% leaves of M 5. Thus the variety M 5 was unsuitable for increasing silk yield and improving the economic characters of mulberry silkworm.