Assessment of Cocoon and Egg Productivity in Selected Strains of Eri Silkworm through Consumption and Utilization Indices

B.K. Prakash¹ , B. Sannappa²

Section:Research Paper, Product Type: Isroset-Journal
Vol.5 , Issue.6 , pp.101-110, Dec-2018

CrossRef-DOI:   https://doi.org/10.26438/ijsrbs/v5i6.101110

Online published on Jan 01, 2018

Copyright © B.K. Prakash , B. Sannappa . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
Silkworm nutrition deals with the substances required for growth and production of proteinaceous silk fiber. The quantum of food consumption, utilization and conversion efficiency into body mater for production of silk mainly governed by the type of host/variety on which silkworm feeds and also strain/breed of silkworm. In the current investigation, selected eri silkworm (Samia cynthia ricini Boisduval) strains (Blue-Plain, Blue-Zebra, Blue Greenish-Plain, White-Plain, White-Zebra, Yellow-Plain, Yellow-Spotted and Yellow-Zebra) were reared using Local Pink castor leaf to assess the efficiency of ingestion, digestion and conversion of food for production of unit quantity of cocoon, shell and eggs. The study revealed that, among the eri silkworm strains White-Plain larvae exhibit significantly least ingesta and digesta to produce a gram of cocoon and shell and it was more with White-Zebra both on fresh and dry weight basis, respectively. The efficiency of conversion of ingested food and digested food into cocoon and shell both on fresh and dry weight basis was significantly better with White-Plain, least values were found with Blue-Plain and Yellow-Spotted for ingested food and digested food, respectively. In respect of leaf-egg ratio, White-Plain strain stood best over other strains with least being in Yellow-Zebra strain. The study inferred that, White-Plain strain of eri silkworm performed better by recording higher efficiency in consumption and utilization of food for eri cocoon and egg production.

Key-Words / Index Term :
Consumption, Eri silkworm, Indices, Samia cynthia ricini, Strains

References :
[1]. L. Richard and Lindroth, “The food conversion efficiencies of insects herbivores”. The Food Insect Newsletter, University of Wisconsin, Madison, Wiscons, 6 (1): 12, 1993.

[2]. C.T. Brues, “Insect Dietary”, Cambridge Mass, pp: 466, 1946.

[3]. G.P. Waldbauer, “The consumption and utilization of food by insects”. Recent Adv. Insect Physiol., 5: 29-288, 1968.

[4]. F. Slansky and J.M. Scriber, “Food consumption and utilization”. In: Comprehensive Insect Physiology, Biochemistry and Pharmacology. Pergamon Press, Oxford, 4: 88-151, 1985.

[5]. Englemann, “Energetics, terrestrial, field studies and animal productivity”, In: Advances in Ecological Research (Ed. J.B. Cragg). Academic Press, London and New York, 3: 73-115, 1966.

[6]. V.K. Rahmathulla, M.T. Himantharaj, G. Srininvasa and R.K. Rajan, “Association of moisture content in mulberry leaf with nutritional parameters of bivoltine silkworm (Bombyx mori L.). Acta Entomologica Sinica, 47: 701-704, 2004.

[7]. V.K. Rahmathulla and H.M. Suresh, “Seasonal variation in food consumption, assimilation, and conversion efficiency of Indian bivoltine hybrid silkworm, Bombyx mori L.”, Journal of Insect Science, 12: 82, 2012.

[8]. Y.S. Reddy, “Role of nutrition in silkworm (Bombyx mori L.) and cocoon production – A review”, J. Seric Tech., 2(1): 1-23, 2011.

[9]. J.M. Scriber and P. Feeny, “Growth of herbivorous caterpillars in relation to feeding specialization and to the growth form of their food plant”, Ecology, 60: 829-850, 1979.

[10]. M. Kogan and J.R.P. Parra, “Techniques and applications of measurements of consumption and utilization of feed by phytophagous insects. In: Current Topics in Insect Endocrinology and Nutrition, Plenum Press, New York, pp. 337-352, 1981.

[11]. N. Sundarraj, S. Nagaraju, M.N. Venkataramu and M.K. Jagannath, “Design and Analysis of Field Experiments. Directorate of Research, UAS, Bangalore, p. 419, 1972.

[12]. D.N.R. Reddy and K.C. Narayanaswamy, “Effect of host on the consumption rate, leaf-cocoon and leaf-egg ratio of eri silkworm, Samia cynthia ricini Boisduval. Entomon, 24: 67-70, 1999.

[13]. B. Sannappa, M. Jayaramaiah, D.N.R. Reddy, S.S. Chavan and Rangaswamy, “Consumption and leaf - cocoon ratio of eri silkworm on castor genotypes. Proc. Natl. Sem. Tropic. Seric. UAS, Bangalore, 3: 47-49, 2000.
[14]. M. Jayaramaiah and B. Sannappa, “Influence of castor genotypes on cocoon traits and reproductive potential in eri silkworm, Samia cynthia ricini Boisduval (Lepidoptera: Saturniidae). Proc. XIXth Cong. Int. Seric. Commission, 21-25th September, Bangkok, Thailand, pp. 256-260, 2002.

[15]. D. Chandrappa, “Performance of eri silkworm on some castor genotype and economics of ericulture-cum-castor seed production. Ph.D. Thesis, UAS, Bangalore, p. 146, 2003.

[16]. S. Chandrashekhar, “Identification of suitable castor genotypes for dual purpose of ericulture and seed production, Ph.D. Thesis, UAS, Bangalore, 122, 2007.

[17]. B. Sannappa, D. Manjunath and B.K. Prakash, “Efficacy of castor hybrids and varieties on nutritional efficiency in eri silkworm (Samia cynthia ricini Boisduval). Journal of Sericulture & Technology, 4(1&2): 27-34, 2013.