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The effects of different photoperiod on the weight of different larval Instars of Eri Silkworm (Philosamia ricini) in gram were studied. The experiments were performed in Zoology Department of Govt. P.G. M.V.M. Ujjain. The disease free laying (DFL’S) were collected from Govt. Sericulture Dept. Indore. Worms were reared under hygienic laboratory condition. The optimum temperature 25±2ºC and relative humidity 75±5% were maintained during complete experiment. The IInstar larvae attained maximum weightat 12hr. light and 12hr. dark. The II, III and IV Instars attained maximum weight in complete darkness and lowest weight in complete light.The V Instarlarvae attained maximum weight at 8hr. light and 16hr. dark.


Sericulture Photoperiod Philosamia ricini larval Instars Nocturnal

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Yadav, U. ., & Jadhav, N. . (2016). The effect of different photoperiod on the weight of different larval Instars of Eri Silkworm (Philosamia ricini) L (Saturniidae: Lepidoptera). Environment Conservation Journal, 17(3), 53–55.


  1. Basaiah, J.M.M. 1988. Consumption and utilization of castor and tapioca by Eri silkworms samia Cynthia ricini Boisd- M.Sc. (Seri.) Thesis. UAS. Bangalore. pp.111.
  2. Debaraj, Y., Datta, R.N., P.K. and Benchamin, K.V. 2002. Eri silkworm crop improvement. A review. Ind. J. Seri., 41 (2): pp.100-105.
  3. Choudhary S. N. 1982. Eri Silk industry. Published by Directorate of Sericulture and weaving. Government of Assam. Pp.16-25.
  4. Goryshin, N.I. and Akchmedov, R.M. 1971. Photoperiod and temperature as factors in the development of Agrotis vpsilon (Lepidoptera: Roctuidae. J. Zoologic, 50: pp.56-66.
  5. Jolly M.S., Sen, S.K. & Ahsan, M.M. 1974. Tasar Culture (1st Ed.). Central Silk Board, Bombay, India: pp.1-266.
  6. Krishnaswami. N. S., and Kumararaj. 1973. Manual of Sericulture, Vol. 2 Silkworm Rearing, F.A.O. United Nations, Rome, 121.
  7. Pandey, R.K. 1995. Do leaf tannins affect non-mulberry silkworm. Indian silk, 34 (8): pp.21-23.
  8. Pfeiffer K, Homberg. 2007. U. Coding of azimuthal directions via time compensated combination of celestial compass cues. Curr Biol. 2007. 17: pp.960–965.
  9. Reddy D.N.R.; Baruah, A.M. and Reddy, R.N. 1998. Effective utilization of Eri silkworm wastes. Proceeding of the Third International Conf. on wild silk moths. pp.278-280.
  10. Sarkar, D. C. 1980. Ericulture in India, K.I. Ahmed (Central Silk Board, Bombay), pp. 22-23.
  11. Saulieh, A. 1975. The effects of photoperiod and group size on the development of Cirphis unipuncta (Haw.) and Laphygma exigua Hb. Ento., 54: pp.314-325.
  12. Shimizu, I and Matsui, K. 1983. Photoreceptions in the eclosion of the silkworm, Bombyx mori. Photochemistry and Photobiology,37: pp 409-413.
  13. Stremer RA. 1959. Spectral response of certain stored-product insects to electromagnetic radiation. Journal of Economic Entomology. 52: 888-892.