Monimala Saikia Roshmi Borah Dutta Hemanta Saikia Manasee Hazarika
Muga cocoons were procured from Jorhat, Kamrup and Lakhimpur districts in spring and autumn season. The objective was to determine the impact of three regions and commercial seasons on cocoon characters in terms of cocoon size, cocoon weight, pupal weight, shell weight and shell ratio. The experiment was laid out in completely randomised design with three replications. The impact of three regions and two seasons was found to be significant on cocoon parameters. Large sized cocoons were obtained from Kamrup district followed by Lakhimpur and Jorhat in autumn season compared to those obtained in spring season. Cocoon weight, shell weight, pupal weight and shell ratio percentage (5.73g, 0.51g, 5.19g and 8.74% respectively) were found to be significantly higher in Kamrup as compared to Lakhimpur (5.4g, 0.46g, 4.94g and 8.43% respectively) while lowest was recorded in Jorhat district (5.27g, 0.43g, 4.83g and 8.20% respectively) irrespective of the seasons. Considering the seasons, cocoons obtained from autumn were superior in terms of cocoon characters (5.66g cocoon weight, 0.49g shell weight, 5.16g pupal weight and 8.63% shell ratio) than those of spring season. Kamrup district and autumn season have turned out to be the best region and best season clearly indicating that region and season influences the cocoon characters of muga silkworm.
How to Cite
Autumn, Cocoon Size, Cocoon Weight, Pupal Weight, Shell Weight, Shell Ratio, Spring
Anonymous (2020b). Statistical Handbook Assam 2020, Chapter 11, Sericulture, Directorate of Economics and Statistics, Govt. of Assam,161-165.
Anonymous (2021a). Retrieved from https://kssrdi.karnataka.gov.in/page/Contributions/Silk+Reeling+and+Fabric+Manufacturing/en on 31st December, 2021.
Aruga, H. (1994). Principles of Sericulture (Translated from Japanese) (1st ed.). Oxford & IBH publishing Co. Pvt. Ltd., New Delhi, India.
Bahar, M. H., Al Parvez, M., Rahman, S., & Islam, R. (2011). Performance of polyvoltine silkworm Bombyx mori L. on different mulberry plant varieties. Entomological Research, 41(2), 46-52.
Barman, H., and Rana, B. (2011). Early stage indoor tray rearing of muga silkworm (Antheraea assamensis Helfer) – a comparative study in respect of larval characters. Munis Entomology & Zoology, 6 (1), 262-267.
Bashir, M., Kamili, A.S., & Sharma, R.K. (2014). Influence of seasonal variation on cocoon, silk filament and economic traits of Bombyx mori L. International Journal of Advanced Biological Research, 4(3), 362-368.
Bayan Borah, M. & Borgohain, A. (2018). State and muga silk industry in independent Assam. International Journal of Social Science and Economic Research, 3(2),495-504.
Bhatia, N. K. & Yousuf, M. (2014). Effect of rearing season, host plants and their interaction on economical traits of tropical tasar silkworm, Antheraea mylitta Drury - an overview. International Journal of Industrial Entomology, 29(1), 93-119.
Bordoloi, K.S. (1999). Effect of hostplants on larval growth and cocoon characters of muga silkworm Antheraea assama Westwood in different seasons [Unpublished M.Sc. (Agri.) dissertation]. Assam Agricultural University, Jorhat, Assam.
Borpuzari, P., Das, M.R., Hussain, H., & Rahman, A. (2020). Performance of muga silkworm on different host plants under different rearing seasons with respect of rearing performance and chemical constituents. Journal of Entomology and Zoology Studies, 8(2), 1254-1258.
Chattopadhyay, D., Chakraborty, A., & Chatterjee, S.M. (2017). Studies on structural and fibre quality characteristics of eri silk cocoons in different seasons and places. Journal of the Textile Institute, 109(4), 1-9.
Chattopadhyay, D., Mitra, G., Moon, M.A., Ramdass, S.V., & Kolarkar, P.J. (2017). Cocoon characters of tropical tasar in different states. Indian silk, 8(5-7),24-27.
Chattopadhyay, D., Munshi, R., & Chakravorty, D. (2018). Studies on distribution of filament length and non-broken filament length for tropical tasar and muga silk cocoons vis-à-vis mulberry silk cocoons. The Journal of the Textile Institute, 109(9),1202-1207.
Choudhury, S.N., Ahmed, R., Bhattacharya, P.R., Dutta, S., Das, A.M., & Rajkhowa, A. (1998). Performance of muga silkworm (Antheraea assama Ww.) on different “som” (Persea bombycina King Ex Hook (F) Kost.) plant collections from Assam, India. In: Proceedings of Third International Conference on Wild Silkmoths (ed. Giridhar, K.; Singh, R.N.; Rahman, K.V.A.; Shillin, S.; Kirsur, M.V.) Bhubaneswar, Odisha, 66-69.
Deka, M., & Kumari, M. (2013). Comparative study of the effect of different food plant species on cocoon crop performance of tropical tasar silkworm (Antheraea mylitta Drury). International Journal of Research in Chemistry and Environment, 3(1), 99-104.
Goswami, N.K., Nath, P. & Saharia, D. (2013). Uzi fly infestation severity in muga seed cocoons, Antheraea assamensis Helfer and crop loss during chotua crop in Assam. Indian Journal of Applied Research, 3(10),1-4.
Gowda, V., Kalpana, G.V., Parthasarathy, B. A., Reddy, S.J. & Angadi, B. S. (2014). On cocoon uniformity in different crosses of bivoltine hybrids of silkworm Bombyx mori L. Entomology and Applied Science Letters, 1(3), 13-18.
Kalita, T. & Dutta, K. (2015). A study on morphological variations in different population of Antheraea assamensis. International Journal of Advanced Research, 3(9), 1429-1437.
Kalita, T. & Dutta, K. (2020). Characterisation of cocoon of different population of Antheraea assamensis (Lepidoptera: Saturniidae), Oriental Insects, 1-17.
Kemprai, D. (2012). Effect of interchanging som, soalu, mejankari plants on larval growth, cocoon yield and characters of muga silkworm, Antheraea assama Westwood (Lepidoptera: Saturniidae) [Unpublished M.Sc. (Agri.) dissertation]. Assam Agricultural University, Jorhat, Assam.
Kumar, R., Gargi, Hembrom, I. (2012) Bioassay studies in Terminalia sp., Lagerstroemia parviflora and L. speciosa. In: Annual report 2011-12. Central Tasar Research and Training Insitute, Ranchi, Jharkhand, India. pp. 4-5.
Lee, Y.W. (1999). Silk reeling and testing manual (1sted.). FAO, Agricultural Services Bulletin No.136. Food and Agriculture Organization of the United Nations Rome.
Mishra, S.N., Ravikumar. D., Reddy, A., & Naik, S.V. (2016). Influence of cocoon stifling and storage on silk reeling performance and quality of muga raw silk. Indian Journal of Fibre & Textile Research,45, 359-361
Naik, C.M., Patil, G.M., Murthy, C., Awaknavar, J.S., Shekharappa, & Alagundagi, S.C. (2010). Development and economic cocoon parameters of eri silkworm, Samia cynthia ricini Boisduval (Lepidoptera: Saturniidae) as influenced by new hosts. Karnataka Journal of Agricultural Science, 23(5), 716-721.
Neog, K., Changmai, A. & Choudhury, B. (2016). Evaluation of different host plants in terms of biochemical properties, rearing performance and cocoon characters of muga silkworm Antheraea assamensis Helfer. In: 103th Indian Science Congress Conference, University of Mysore, Mysuru, 1-11.
Padaki, N.V., Bhattacharya, A., Das, B., Choudhury, B., Mishra, S.N., & Singh, B.K. (2014). Studies on the Influence of seasonal and regional aspects on the quality of muga silk. Research Journal of Textile and Apparel, 18, 25-30.
Pallabi & Sannappa, B. (2018) Commercial characters of selected eco-races of eri silkworm (Samia cynthia ricini Boisduval) reared on castor hybrid/variety, 5(4), 513-518.
Panse, V.G. & Sukhatme, P.V. (1989). Statistical methods for agricultural workers (5th ed.). Indian Council of Agricultural Research, New Delhi, India.
Rahman, A., Talukdar, K. &Borpuzari, P. (2015). Seasonal effects on development and economic characters of muga silkworm (Antheraea assama Westwood). Hexagon, 1, 50-59.
Rahmathulla, V.K. (2012). Management of climatic factors for successful silkworm (Bombyx mori L.) crop and higher silk production: a review. Psyche: A Journal of Entomology, 1-12.
Saikia, P. (2008). Cocoon and yarn parameters of eri silkworm reared on certain host plants [Unpublished M.Sc. (Agri.) dissertation]. Assam Agricultural University, Jorhat, Assam.
Sarkar, K. (2018). Management of nutritional and climatic factors for silkworm rearing in West Bengal: a review. International Journal of Agriculture and Environment and Biotechnology, 11(5), 769-780.
Sarmah, M.C., Neog, K., Das, A. & Phukan, J.C.D. (2013). Impact of soil fertility and leaf nutrients status on cocoon production of muga silkworm, Antheraea assamensis (Helfer) in potential muga growing areas of Assam, India. International Journal of Current Microbiology and Applied Sciences, 2(9), 25-38.
Singh, N.I., and Goswami, D. (2012). Food plant varietal effect on the rearing and grainage of muga silkworm, Antheraea assamensis Helfer, 1837. Munis Entomology & Zoology, 7(2), 1023-1027.
Subharani, S., Debaraj, Y., Bidyapati, L., & Sinha, A. K. (2017). Rearing performances of Indian temperate tasar silkworm, Antheraea proylei Jolly fed on Quercus serrata (Carruther), Quercus griffithii (Hook & Thomson) and Lithocarpus dealbata (Hook & Thomson) during autumn crop. Munis Entomology & Zoology,12(2), 612-617.
Tikader, A. (2012). Feed performance of muga silkworm (Antheraea assamensis Helfer) on different host plants. Grobios, 39, 104-108.
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