Effect of Phytoecdysteroid on Fecundity of Multivoltine Mulberry Silkworm Bombyx Mori Linn.

ABSTRACT Effect of phytoecdysteroid on fecundity and hatchability of multivoltine mulberry silkworm Bombyx mori was studied. Experiments were performed by 40, 50, 60 and 70% concentration of phytoecdysteroid obtained from Achyranthes leaf extract. A control set was always maintained with each set of experiment.The parameter selected for observation was fecundity of Bombyx mori. Maximum fecundity (423.33 ± 4.67) was noticed to be in case of the double treatment (IV and V instar larvae were treated) by 60% phytoecdysteroid concentration. Phytoecdysteroid treatment,if applied tactfully,may be useful for boosting up the sericulture industry as well as the economy of silkworm rearing. References Abdel Salam, K.A. and Mahoud S.M, (1995). Stimulating effects of low levels of 60 Co gamma rays on the silkworm, Bombyx mori (L) . Anzeiger fuer Schaedlings Kunde pflanzeschutz umweltschutx. , 68: 147-150. Chou, W.S. & Lu, H.S. 1980. Growth regulation and silk production in Bombyx mori L from Phytogenous ecdysterone. In: Progress in Ecdysone Research (Hoffman,J. A. ed.) Elsevier. North Holland, 281-297. Dinan, L., Harmatha, J.,Volodin, V. and Lafont, R., (2009). Phytoecdysteroids: Diversity, Biosynthesis and distribution. In: Ecdysones:Structures and Functions.(Guy, S. ed.) Springer, 3-45. Doane, W.W., (1973) Role of hormone of insect development. In: Developmental Systems. Insects, S.J.Counce and C.H.Waddington (Eds), Academic Press, New York: 291-297. Ghosh, S.S., (1987). Silk realing technology,Appropriate Sericulture Technique (Ed. by M.S.Jolly). CSR and TI. Mysore, India, pp: 145-172. Hurkadli, H.K., (1998). Hatching of silkworm eggs. Indian Taxtile Journal; 108: 72-74. Hussain, M., Khan, S.A., Naeem, M. and Mohsin, A., (2011). Effect of Relative Humidity on Factors of Seed Cocoon Production in some Inbred Silk Worm (Bombyx mori). Int. J. Agric. Biol. 13:57-60. Kawaguchi, Y., Banno, Y., Doira, H. and Fuji, H., (1993b). Manifestation of characteristics in the giant egg mutant of Bombyx mori (Lepidoptera:Bombycidae) 4 Surface structure of eggshell in Ge egg. Jpn. J. Appl.Ent.Zool., 37:91-95. Kawaguchi, Y., Banno, Y., Koga, K., Doira, H. and Fuji, H., (1993a). Polygonal patterns on egg shells of giant egg mutant and large egg induced by 20-hydroxyecdysone in Bombyx mori. J. Insect Physiol., 36: 437-443. Krishnaswamy, S., Narasimhanna, M.N., Suryanaryan, S.K.and Kumar Raja, S., (1973). Sericulture Manual 2 Silkworm Rearing. F.A.O. Agric Serves Bull. Rome, 15: 1-131