Evaluation of CSR Breeds for their Biology, Performance and Economic Importance of Silkworm, Bombyx mori L.

Murali S¹*, Tayal MK², Anil Dhar², Arti Devi³ and Sardar Singh²

¹Scientist - B, Regional Sericultural Research Station, Central Silk Board, Jammu, Jammu and Kashmir, India
²Scientist - D, Regional Sericultural Research Station, Central Silk Board, Jammu, Jammu and Kashmir, India
³Rearing Assistant, Regional Sericultural Research Station, Central Silk Board, Jammu, Jammu and Kashmir, India

*Corresponding Author: Murali S, Regional Sericultural Research Station, Central Silk Board, Jammu and Kashmir, India. E-mail: dr.mmrl@rediffmail.com

Received: December 21, 2017; Published: February 12, 2018

Citation: Murali S., et al. “Evaluation of CSR Breeds for their Biology, Performance and Economic Importance of Silkworm, Bombyx mori L.". Acta Scientific Agriculture 2.3 (2018).

Abstract

  The classification and characterization of silkworm breeds are important for sericulture, which is supported by the constant development of new hybrids. In this study, 5 parental CSR breeds of Bombyxi mori L. from the germplasm bank of RSRS, Miran Sahib were evaluated regrading phenotypic and biological/economic parameters of CSR breeds. Observations on the different phenotypic and economic traits of silkworm, Bombyx mori L. were taken. The perusal of the data reveals that the fecundity was recorded from 365.00 (CSR - 18) to 460.67 (CSR - 5) and hatching per cent ranged from 93.87 (CSR 19) to 95.88 (CSR 2). The larval weight varied in the range of 34.94 to 40.86 g whereas, larval duration was observed in the range of 24.00 days to 26.22 days. The larval length recorded as on 6th day 7.76 cm (CSR - 19) to 8.26 cm (CSR - 2). Single cocoon weight 1.49 to 1.70 g. The highest single cocoon weight was CSR - 18 (1.70 g), Single shell weight 0.28 to 0.36 g. Maximum shell weight recorded in CSR - 18 (0.36 g), Shell percentage 18.86 per cent (CSR - 4) to 21.29 per cent (CSR - 19). Maximum yield CSR - 2 (15.23 Kg), was observed significantly superior compared to others. These findings will help the sericulturists in finding suitable breed for getting more economic returns from silkworm rearing. It is observed that CSR - 2 is having highest yield per 10, 000 larvae with shell ratio 20.06 (%).

Keywords: Fecundity; Larval Duration; Larval Length; Cocoon Yield; Shell Ratio; Bombyx mori L.

Copyright: © 2018 Murali S., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.