Economic parameters in selected silkworm races/breeds of Bombyx mori L. using two mulberry varieties
BN Prashanth Kumar, RS Umakanth
The present study was conducted to evaluate larval growth and economic characteristics of cocoon produced by silkworm, Bombyx mori, L. Two mulberry varieties namely, V-1 and M-5 was selected to feed on Multivoltine Pure Mysore, bivoltine CSR2 and multi-bi hybrid PMXCSR2. Further, three replications were maintained and 100 silkworm larvae were reared in each replication. Different larval parameters viz. larval duration, larval weight, were measured at different number of feeding of silkworm. Soon after, harvested the cocoon and same were used to find out cocoon weight, shell weight, shell ratio, filament length, filament weight, denier, reelability, renditta, fecundity and hatching percentage were recorded. Results of the present work noticed that significant differences among different mulberry varieties on larval growth and cocoon characteristics. The best performance was observed by feeding V1 variety @ 4 feedings/day in respect of larval duration, larval weight, cocoon weight, shell weight, filament length, filament weight, denier, reelability, renditta, fecundity and hatching percentage were performed superior as compared to the larvae fed on V1 variety @ 2 feedings/day and M5 variety @ 4 and 2 feedings/day. Therefore, it was concluded that V1 mulberry leaves @ 4 feedings/day is the best as compared to M5 mulberry variety.